4.9.313-rc1 review

This is the start of the stable review cycle for the 4.9.313 release. There are 66 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know.

Responses should be made by Thu, 12 May 2022 13:07:16 +0000. Anything received after that time might be too late.

The whole patch series can be found in one patch at:

	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.9.313-rc1.gz

or in the git tree and branch at:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.9.y
and the diffstat can be found below.

thanks,

greg k-h

-------------
Pseudo-Shortlog of commits:

Greg Kroah-Hartman <[email protected]>

    Linux 4.9.313-rc1

Mike Snitzer <[email protected]>
dm: interlock pending dm_io and dm_wait_for_bios_completion

Jiazi Li <[email protected]>
dm: fix mempool NULL pointer race when completing IO

[email protected] <[email protected]>
net: ipv6: ensure we call ipv6_mc_down() at most once

Thadeu Lima de Souza Cascardo <[email protected]>
net: sched: prevent UAF on tc_ctl_tfilter when temporarily dropping rtnl_lock

Sandipan Das <[email protected]>

    kvm: x86/cpuid: Only provide CPUID leaf 0xA if host has architectural PMU

Eric Dumazet <[email protected]>
net: igmp: respect RCU rules in ip_mc_source() and ip_mc_msfilter()

Filipe Manana <[email protected]>
btrfs: always log symlinks in full mode

Sergey Shtylyov <[email protected]>
smsc911x: allow using IRQ0

Shravya Kumbham <[email protected]>
net: emaclite: Add error handling for of_address_to_resource()

Codrin Ciubotariu <[email protected]>
ASoC: dmaengine: Restore NULL prepare_slave_config() callback

Armin Wolf <[email protected]>
hwmon: (adt7470) Fix warning on module removal

Duoming Zhou <[email protected]>
NFC: netlink: fix sleep in atomic bug when firmware download timeout

Duoming Zhou <[email protected]>
nfc: nfcmrvl: main: reorder destructive operations in nfcmrvl_nci_unregister_dev to avoid bugs

Duoming Zhou <[email protected]>
nfc: replace improper check device_is_registered() in netlink related functions

Daniel Hellstrom <[email protected]>

    can: grcan: use ofdev->dev when allocating DMA memory

Duoming Zhou <[email protected]>
can: grcan: grcan_close(): fix deadlock

Mark Brown <[email protected]>
ASoC: wm8958: Fix change notifications for DSP controls

Niels Dossche <[email protected]>

    firewire: core: extend card->lock in fw_core_handle_bus_reset

Jakob Koschel <[email protected]>
firewire: remove check of list iterator against head past the loop body

Chengfeng Ye <[email protected]>
firewire: fix potential uaf in outbound_phy_packet_callback()

Trond Myklebust <[email protected]>
Revert "SUNRPC: attempt AF_LOCAL connect on setup"

Takashi Sakamoto <[email protected]>
ALSA: fireworks: fix wrong return count shorter than expected by 4 bytes

Helge Deller <[email protected]>
parisc: Merge model and model name into one line in /proc/cpuinfo

Maciej W. Rozycki <[email protected]>
MIPS: Fix CP0 counter erratum detection for R4k CPUs

Daniel Starke <[email protected]>
tty: n_gsm: fix incorrect UA handling

Daniel Starke <[email protected]>
tty: n_gsm: fix wrong command frame length field encoding

Daniel Starke <[email protected]>
tty: n_gsm: fix wrong command retry handling

Daniel Starke <[email protected]>
tty: n_gsm: fix missing explicit ldisc flush

Daniel Starke <[email protected]>
tty: n_gsm: fix insufficient txframe size

Daniel Starke <[email protected]>
tty: n_gsm: fix malformed counter for out of frame data

Daniel Starke <[email protected]>
tty: n_gsm: fix wrong signal octet encoding in convergence layer type 2

Borislav Petkov <[email protected]>
x86/cpu: Load microcode during restore_processor_state()

Duoming Zhou <[email protected]>
drivers: net: hippi: Fix deadlock in rr_close()

Zheyu Ma <[email protected]>
ASoC: wm8731: Disable the regulator when probing fails

Manish Chopra <[email protected]>
bnx2x: fix napi API usage sequence

Yang Yingliang <[email protected]>
clk: sunxi: sun9i-mmc: check return value after calling platform_get_resource()

Christophe JAILLET <[email protected]>
bus: sunxi-rsb: Fix the return value of sunxi_rsb_device_create()

Eric Dumazet <[email protected]>
tcp: fix potential xmit stalls caused by TCP_NOTSENT_LOWAT

Peilin Ye <[email protected]>
ip_gre: Make o_seqno start from 0 in native mode

Lv Ruyi <[email protected]>
pinctrl: pistachio: fix use of irq_of_parse_and_map()

Miaoqian Lin <[email protected]>
mtd: rawnand: Fix return value check of wait_for_completion_timeout

H. Nikolaus Schaller <[email protected]>
ARM: dts: Fix mmc order for omap3-gta04

Miaoqian Lin <[email protected]>
ARM: OMAP2+: Fix refcount leak in omap_gic_of_init

Krzysztof Kozlowski <[email protected]>
phy: samsung: exynos5250-sata: fix missing device put in probe error paths

Miaoqian Lin <[email protected]>
phy: samsung: Fix missing of_node_put() in exynos_sata_phy_probe

Fabio Estevam <[email protected]>
ARM: dts: imx6qdl-apalis: Fix sgtl5000 detection issue

Mikulas Patocka <[email protected]>
hex2bin: fix access beyond string end

Mikulas Patocka <[email protected]>
hex2bin: make the function hex_to_bin constant-time

Maciej W. Rozycki <[email protected]>
serial: 8250: Correct the clock for EndRun PTP/1588 PCIe device

Maciej W. Rozycki <[email protected]>
serial: 8250: Also set sticky MCR bits in console restoration

Vijayavardhan Vennapusa <[email protected]>
usb: gadget: configfs: clear deactivation flag in configfs_composite_unbind()

Dan Vacura <[email protected]>
usb: gadget: uvc: Fix crash when encoding data for usb request

Hangyu Hua <[email protected]>
usb: misc: fix improper handling of refcount in uss720_probe()

Zheyu Ma <[email protected]>
iio: magnetometer: ak8975: Fix the error handling in ak8975_power_on()

Michael Hennerich <[email protected]>
iio: dac: ad5446: Fix read_raw not returning set value

Zizhuang Deng <[email protected]>
iio: dac: ad5592r: Fix the missing return value.

Henry Lin <[email protected]>
xhci: stop polling roothubs after shutdown

Daniele Palmas <[email protected]>

    USB: serial: option: add Telit 0x1057, 0x1058, 0x1075 compositions

Slark Xiao <[email protected]>
USB: serial: option: add support for Cinterion MV32-WA/MV32-WB

Bruno Thomsen <[email protected]>

    USB: serial: cp210x: add PIDs for Kamstrup USB Meter Reader

Kees Cook <[email protected]>
USB: serial: whiteheat: fix heap overflow in WHITEHEAT_GET_DTR_RTS

Oliver Neukum <[email protected]>
USB: quirks: add STRING quirk for VCOM device

Oliver Neukum <[email protected]>
USB: quirks: add a Realtek card reader

Greg Kroah-Hartman <[email protected]>
lightnvm: disable the subsystem

Greg Kroah-Hartman <[email protected]>
Revert "net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link"

Willy Tarreau <[email protected]>
floppy: disable FDRAWCMD by default

-------------

Diffstat:

 Makefile                                           |  4 +-
 arch/arm/boot/dts/imx6qdl-apalis.dtsi              | 10 ++++-
 arch/arm/boot/dts/omap3-gta04.dtsi                 |  2 +
 arch/arm/mach-omap2/omap4-common.c                 |  2 +
 arch/mips/include/asm/timex.h                      |  8 ++--
 arch/mips/kernel/time.c                            | 11 ++----
 arch/parisc/kernel/processor.c                     |  3 +-
 arch/x86/include/asm/microcode.h                   |  2 +
 arch/x86/kernel/cpu/microcode/core.c               |  6 +--
 arch/x86/kvm/cpuid.c                               |  5 +++
 arch/x86/power/cpu.c                               |  8 ++++
 drivers/block/Kconfig                              | 16 ++++++++
 drivers/block/floppy.c                             | 43 ++++++++++++++++------
 drivers/bus/sunxi-rsb.c                            |  2 +
 drivers/clk/sunxi/clk-sun9i-mmc.c                  |  2 +
 drivers/firewire/core-card.c                       |  3 ++
 drivers/firewire/core-cdev.c                       |  4 +-
 drivers/firewire/core-topology.c                   |  9 ++---
 drivers/firewire/core-transaction.c                | 30 ++++++++-------
 drivers/firewire/sbp2.c                            | 13 ++++---
 drivers/hwmon/adt7470.c                            |  4 +-
 drivers/iio/dac/ad5446.c                           |  2 +-
 drivers/iio/dac/ad5592r-base.c                     |  2 +-
 drivers/iio/magnetometer/ak8975.c                  |  1 +
 drivers/lightnvm/Kconfig                           |  2 +-
 drivers/md/dm.c                                    | 19 ++++++----
 drivers/mtd/nand/sh_flctl.c                        | 14 ++++---
 drivers/net/can/grcan.c                            |  8 +++-
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c   |  9 +++--
 drivers/net/ethernet/smsc/smsc911x.c               |  2 +-
 drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.c |  8 ++++
 drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.h |  4 --
 .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    | 13 ++++---
 drivers/net/ethernet/xilinx/xilinx_emaclite.c      | 15 ++++++--
 drivers/net/hippi/rrunner.c                        |  2 +
 drivers/nfc/nfcmrvl/main.c                         |  2 +-
 drivers/phy/phy-exynos5250-sata.c                  | 21 ++++++++---
 drivers/pinctrl/pinctrl-pistachio.c                |  6 +--
 drivers/tty/n_gsm.c                                | 40 ++++++++++----------
 drivers/tty/serial/8250/8250_pci.c                 |  8 ++--
 drivers/tty/serial/8250/8250_port.c                |  2 +-
 drivers/usb/core/quirks.c                          |  6 +++
 drivers/usb/gadget/configfs.c                      |  2 +
 drivers/usb/gadget/function/uvc_queue.c            |  2 +
 drivers/usb/host/xhci.c                            | 11 ++++++
 drivers/usb/misc/uss720.c                          |  3 +-
 drivers/usb/serial/cp210x.c                        |  2 +
 drivers/usb/serial/option.c                        | 12 ++++++
 drivers/usb/serial/whiteheat.c                     |  5 +--
 fs/btrfs/tree-log.c                                | 14 ++++++-
 include/linux/kernel.h                             |  2 +-
 include/net/tcp.h                                  |  1 +
 lib/hexdump.c                                      | 41 ++++++++++++++++-----
 net/ipv4/igmp.c                                    |  9 +++--
 net/ipv4/ip_gre.c                                  |  8 ++--
 net/ipv4/tcp_input.c                               | 12 +++++-
 net/ipv4/tcp_output.c                              |  1 +
 net/ipv6/addrconf.c                                |  8 +++-
 net/nfc/core.c                                     | 29 +++++++--------
 net/nfc/netlink.c                                  |  4 +-
 net/sched/cls_api.c                                |  5 ++-
 net/sunrpc/xprtsock.c                              |  3 --
 sound/firewire/fireworks/fireworks_hwdep.c         |  1 +
 sound/soc/codecs/wm8731.c                          | 19 ++++++----
 sound/soc/codecs/wm8958-dsp2.c                     |  8 ++--
 sound/soc/soc-generic-dmaengine-pcm.c              |  6 +--
 66 files changed, 387 insertions(+), 194 deletions(-)

From: Willy Tarreau <[email protected]>

commit 233087ca063686964a53c829d547c7571e3f67bf upstream.

Minh Yuan reported a concurrency use-after-free issue in the floppy code between raw_cmd_ioctl and seek_interrupt.

[ It turns out this has been around, and that others have reported the
KASAN splats over the years, but Minh Yuan had a reproducer for it and
so gets primary credit for reporting it for this fix - Linus ]

The problem is, this driver tends to break very easily and nowadays, nobody is expected to use FDRAWCMD anyway since it was used to manipulate non-standard formats. The risk of breaking the driver is higher than the risk presented by this race, and accessing the device requires privileges anyway.

Let's just add a config option to completely disable this ioctl and leave it disabled by default. Distros shouldn't use it, and only those running on antique hardware might need to enable it.

---
 drivers/block/Kconfig  |   16 ++++++++++++++++
 drivers/block/floppy.c |   43 ++++++++++++++++++++++++++++++++-----------
 2 files changed, 48 insertions(+), 11 deletions(-)

@@ -33,6 +33,22 @@ config BLK_DEV_FD
 	  To compile this driver as a module, choose M here: the
 	  module will be called floppy.
 
+config BLK_DEV_FD_RAWCMD
+	bool "Support for raw floppy disk commands (DEPRECATED)"
+	depends on BLK_DEV_FD
+	help
+	  If you want to use actual physical floppies and expect to do
+	  special low-level hardware accesses to them (access and use
+	  non-standard formats, for example), then enable this.
+
+	  Note that the code enabled by this option is rarely used and
+	  might be unstable or insecure, and distros should not enable it.
+
+	  Note: FDRAWCMD is deprecated and will be removed from the kernel
+	  in the near future.
+
+	  If unsure, say N.
+
 config AMIGA_FLOPPY
 	tristate "Amiga floppy support"
 	depends on AMIGA

This reverts commit edba120f094394454f5b9511d04abd7e8c2c31ee which is commit a6aaa00324240967272b451bfa772547bd576ee6 upstream.

Pavel reports that it causes boot issues, so revert it for now.

---
 drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.c  |    8 ++++++++
 drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.h  |    4 ----
 drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c |   13 ++++++++-----
 3 files changed, 16 insertions(+), 9 deletions(-)

@@ -68,6 +68,10 @@
 #define TSE_PCS_USE_SGMII_ENA				BIT(0)
 #define TSE_PCS_IF_USE_SGMII				0x03
 
+#define SGMII_ADAPTER_CTRL_REG				0x00
+#define SGMII_ADAPTER_DISABLE				0x0001
+#define SGMII_ADAPTER_ENABLE				0x0000
+
 #define AUTONEGO_LINK_TIMER				20
 
 static int tse_pcs_reset(void __iomem *base, struct tse_pcs *pcs)

@@ -211,8 +215,12 @@ void tse_pcs_fix_mac_speed(struct tse_pc
 			   unsigned int speed)
 {
 	void __iomem *tse_pcs_base = pcs->tse_pcs_base;
+	void __iomem *sgmii_adapter_base = pcs->sgmii_adapter_base;
 	u32 val;
 
+	writew(SGMII_ADAPTER_ENABLE,
+	       sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
+
 	pcs->autoneg = phy_dev->autoneg;
 
 	if (phy_dev->autoneg == AUTONEG_ENABLE) {

@@ -21,10 +21,6 @@
 #include <linux/phy.h>
 #include <linux/timer.h>
 
-#define SGMII_ADAPTER_CTRL_REG		0x00
-#define SGMII_ADAPTER_ENABLE		0x0000
-#define SGMII_ADAPTER_DISABLE		0x0001
-
 struct tse_pcs {
 	struct device *dev;
 	void __iomem *tse_pcs_base;

@@ -29,6 +29,9 @@
 
 #include "altr_tse_pcs.h"
 
+#define SGMII_ADAPTER_CTRL_REG                          0x00
+#define SGMII_ADAPTER_DISABLE                           0x0001
+
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII 0x0
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII 0x1
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII 0x2

@@ -62,14 +65,16 @@ static void socfpga_dwmac_fix_mac_speed(
 {
 	struct socfpga_dwmac *dwmac = (struct socfpga_dwmac *)priv;
 	void __iomem *splitter_base = dwmac->splitter_base;
+	void __iomem *tse_pcs_base = dwmac->pcs.tse_pcs_base;
 	void __iomem *sgmii_adapter_base = dwmac->pcs.sgmii_adapter_base;
 	struct device *dev = dwmac->dev;
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct phy_device *phy_dev = ndev->phydev;
 	u32 val;
 
-	writew(SGMII_ADAPTER_DISABLE,
-	       sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
+	if ((tse_pcs_base) && (sgmii_adapter_base))
+		writew(SGMII_ADAPTER_DISABLE,
+		       sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
 
 	if (splitter_base) {
 		val = readl(splitter_base + EMAC_SPLITTER_CTRL_REG);

@@ -91,9 +96,7 @@ static void socfpga_dwmac_fix_mac_speed(
 		writel(val, splitter_base + EMAC_SPLITTER_CTRL_REG);
 	}
 
-	writew(SGMII_ADAPTER_ENABLE,
-	       sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
-	if (phy_dev)
+	if (tse_pcs_base && sgmii_adapter_base)
 		tse_pcs_fix_mac_speed(&dwmac->pcs, phy_dev, speed);
 }
 

In commit 9ea9b9c48387 ("remove the lightnvm subsystem") the lightnvm subsystem was removed as there is no hardware in the wild for it, and the code is known to have problems. This should also be disabled for older LTS kernels as well to prevent anyone from accidentally using it.

---
 drivers/lightnvm/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -4,7 +4,7 @@
 
 menuconfig NVM
 	bool "Open-Channel SSD target support"
-	depends on BLOCK && HAS_DMA
+	depends on BLOCK && HAS_DMA && BROKEN
 	help
 	  Say Y here to get to enable Open-channel SSDs.
 

From: Oliver Neukum <[email protected]>

commit 2a7ccf6bb6f147f64c025ad68f4255d8e1e0ce6d upstream.

This device is reported to stall when enummerated.

---
 drivers/usb/core/quirks.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -243,6 +243,9 @@ static const struct usb_device_id usb_qu
 	{ USB_DEVICE(0x0b05, 0x17e0), .driver_info =
 			USB_QUIRK_IGNORE_REMOTE_WAKEUP },
 
+	/* Realtek Semiconductor Corp. Mass Storage Device (Multicard Reader)*/
+	{ USB_DEVICE(0x0bda, 0x0151), .driver_info = USB_QUIRK_CONFIG_INTF_STRINGS },
+
 	/* Realtek hub in Dell WD19 (Type-C) */
 	{ USB_DEVICE(0x0bda, 0x0487), .driver_info = USB_QUIRK_NO_LPM },
 	{ USB_DEVICE(0x0bda, 0x5487), .driver_info = USB_QUIRK_RESET_RESUME },

From: Oliver Neukum <[email protected]>

commit ec547af8a9ea6441864bad34172676b5652ceb96 upstream.

This has been reported to stall if queried

---
 drivers/usb/core/quirks.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -328,6 +328,9 @@ static const struct usb_device_id usb_qu
 	/* DJI CineSSD */
 	{ USB_DEVICE(0x2ca3, 0x0031), .driver_info = USB_QUIRK_NO_LPM },
 
+	/* VCOM device */
+	{ USB_DEVICE(0x4296, 0x7570), .driver_info = USB_QUIRK_CONFIG_INTF_STRINGS },
+
 	/* INTEL VALUE SSD */
 	{ USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },
 

From: Kees Cook <[email protected]>

commit e23e50e7acc8d8f16498e9c129db33e6a00e80eb upstream.

The sizeof(struct whitehat_dr_info) can be 4 bytes under CONFIG_AEABI=n due to "-mabi=apcs-gnu", even though it has a single u8:

whiteheat_private {
        __u8                       mcr;                  /*     0     1 */

        /* size: 4, cachelines: 1, members: 1 */
        /* padding: 3 */
        /* last cacheline: 4 bytes */
};

The result is technically harmless, as both the source and the destinations are currently the same allocation size (4 bytes) and don't use their padding, but if anything were to ever be added after the "mcr" member in "struct whiteheat_private", it would be overwritten. The structs both have a single u8 "mcr" member, but are 4 bytes in padded size. The memcpy() destination was explicitly targeting the u8 member (size 1) with the length of the whole structure (size 4), triggering the memcpy buffer overflow warning:

In file included from include/linux/string.h:253,
from include/linux/bitmap.h:11,
from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/spinlock.h:62,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from drivers/usb/serial/whiteheat.c:17:
In function 'fortify_memcpy_chk',
inlined from 'firm_send_command' at drivers/usb/serial/whiteheat.c:587:4:
include/linux/fortify-string.h:328:25: warning: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Wattribute-warning]

  328 |                         __write_overflow_field(p_size_field, size);
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Instead, just assign the one byte directly.

---
 drivers/usb/serial/whiteheat.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

@@ -644,9 +644,8 @@ static int firm_send_command(struct usb_
 		switch (command) {
 		case WHITEHEAT_GET_DTR_RTS:
 			info = usb_get_serial_port_data(port);
-			memcpy(&info->mcr, command_info->result_buffer,
-					sizeof(struct whiteheat_dr_info));
-				break;
+			info->mcr = command_info->result_buffer[0];
+			break;
 		}
 	}
 exit:

From: Bruno Thomsen <[email protected]>

commit 35a923a0b329c343e9e81d79518e2937eba06fcd upstream.

Wireless reading of water and heat meters using 868 MHz wM-Bus mode C1.

The two different product IDs allow detection of dongle antenna solution:
- Internal antenna
- External antenna using SMA connector

https://www.kamstrup.com/en-en/water-solutions/water-meter-reading/usb-meter-reader

---
 drivers/usb/serial/cp210x.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -192,6 +192,8 @@ static const struct usb_device_id id_tab
 	{ USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
 	{ USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
 	{ USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
+	{ USB_DEVICE(0x17A8, 0x0101) }, /* Kamstrup 868 MHz wM-Bus C-Mode Meter Reader (Int Ant) */
+	{ USB_DEVICE(0x17A8, 0x0102) }, /* Kamstrup 868 MHz wM-Bus C-Mode Meter Reader (Ext Ant) */
 	{ USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
 	{ USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
 	{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */

From: Slark Xiao <[email protected]>

commit b4a64ed6e7b857317070fcb9d87ff5d4a73be3e8 upstream.

Add support for Cinterion device MV32-WA/MV32-WB. MV32-WA PID is 0x00F1, and MV32-WB PID is 0x00F2.

Test evidence as below:

T:  Bus=04 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  4 Spd=5000 MxCh= 0
D:  Ver= 3.20 Cls=ef(misc ) Sub=02 Prot=01 MxPS= 9 #Cfgs=  1
P:  Vendor=1e2d ProdID=00f1 Rev=05.04
S:  Manufacturer=Cinterion
S:  Product=Cinterion PID 0x00F1 USB Mobile Broadband
S:  SerialNumber=78ada8c4
C:  #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=896mA
I:  If#=0x0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
I:  If#=0x1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
I:  If#=0x2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=40 Driver=option
I:  If#=0x3 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I:  If#=0x4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=60 Driver=option
I:  If#=0x5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=option

T:  Bus=04 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  3 Spd=5000 MxCh= 0
D:  Ver= 3.20 Cls=ef(misc ) Sub=02 Prot=01 MxPS= 9 #Cfgs=  1
P:  Vendor=1e2d ProdID=00f2 Rev=05.04
S:  Manufacturer=Cinterion
S:  Product=Cinterion PID 0x00F2 USB Mobile Broadband
S:  SerialNumber=cdd06a78
C:  #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=896mA
I:  If#=0x0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
I:  If#=0x1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
I:  If#=0x2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=40 Driver=option
I:  If#=0x3 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I:  If#=0x4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=60 Driver=option
I:  If#=0x5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=option

Interface 0&1: MBIM, 2:Modem, 3: GNSS, 4: NMEA, 5: Diag GNSS port don't use serial driver.

---
 drivers/usb/serial/option.c |    6 ++++++
 1 file changed, 6 insertions(+)

@@ -430,6 +430,8 @@ static void option_instat_callback(struc
 #define CINTERION_PRODUCT_CLS8			0x00b0
 #define CINTERION_PRODUCT_MV31_MBIM		0x00b3
 #define CINTERION_PRODUCT_MV31_RMNET		0x00b7
+#define CINTERION_PRODUCT_MV32_WA		0x00f1
+#define CINTERION_PRODUCT_MV32_WB		0x00f2
 
 /* Olivetti products */
 #define OLIVETTI_VENDOR_ID			0x0b3c

@@ -1945,6 +1947,10 @@ static const struct usb_device_id option
 	  .driver_info = RSVD(3)},
 	{ USB_DEVICE_INTERFACE_CLASS(CINTERION_VENDOR_ID, CINTERION_PRODUCT_MV31_RMNET, 0xff),
 	  .driver_info = RSVD(0)},
+	{ USB_DEVICE_INTERFACE_CLASS(CINTERION_VENDOR_ID, CINTERION_PRODUCT_MV32_WA, 0xff),
+	  .driver_info = RSVD(3)},
+	{ USB_DEVICE_INTERFACE_CLASS(CINTERION_VENDOR_ID, CINTERION_PRODUCT_MV32_WB, 0xff),
+	  .driver_info = RSVD(3)},
 	{ USB_DEVICE(OLIVETTI_VENDOR_ID, OLIVETTI_PRODUCT_OLICARD100),
 	  .driver_info = RSVD(4) },
 	{ USB_DEVICE(OLIVETTI_VENDOR_ID, OLIVETTI_PRODUCT_OLICARD120),

From: Daniele Palmas <[email protected]>

commit f32c5a0423400e01f4d7c607949fa3a1f006e8fa upstream.

Add support for the following Telit FN980 and FN990 compositions:

0x1057: tty, adb, rmnet, tty, tty, tty, tty, tty
0x1058: tty, adb, tty, tty, tty, tty, tty
0x1075: adb, tty

---
 drivers/usb/serial/option.c |    6 ++++++
 1 file changed, 6 insertions(+)

@@ -1195,6 +1195,10 @@ static const struct usb_device_id option
 	  .driver_info = NCTRL(0) | RSVD(1) },
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1056, 0xff),	/* Telit FD980 */
 	  .driver_info = NCTRL(2) | RSVD(3) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1057, 0xff),	/* Telit FN980 */
+	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(2) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1058, 0xff),	/* Telit FN980 (PCIe) */
+	  .driver_info = NCTRL(0) | RSVD(1) },
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1060, 0xff),	/* Telit LN920 (rmnet) */
 	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(2) },
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1061, 0xff),	/* Telit LN920 (MBIM) */

@@ -1211,6 +1215,8 @@ static const struct usb_device_id option
 	  .driver_info = NCTRL(2) | RSVD(3) },
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1073, 0xff),	/* Telit FN990 (ECM) */
 	  .driver_info = NCTRL(0) | RSVD(1) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1075, 0xff),	/* Telit FN990 (PCIe) */
+	  .driver_info = RSVD(0) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910),
 	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(3) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910_DUAL_MODEM),

From: Henry Lin <[email protected]>

commit dc92944a014cd6a6f6c94299aaa36164dd2c238a upstream.

While rebooting, XHCI controller and its bus device will be shut down in order by .shutdown callback. Stopping roothubs polling in xhci_shutdown() can prevent XHCI driver from accessing port status after its bus device shutdown.

Take PCIe XHCI controller as example, if XHCI driver doesn't stop roothubs polling, XHCI driver may access PCIe BAR register for port status after parent PCIe root port driver is shutdown and cause PCIe bus error.

[check shared hcd exist before stopping its roothub polling -Mathias]

---
 drivers/usb/host/xhci.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

@@ -746,6 +746,17 @@ void xhci_shutdown(struct usb_hcd *hcd)
 	if (xhci->quirks & XHCI_SPURIOUS_REBOOT)
 		usb_disable_xhci_ports(to_pci_dev(hcd->self.controller));
 
+	/* Don't poll the roothubs after shutdown. */
+	xhci_dbg(xhci, "%s: stopping usb%d port polling.\n",
+			__func__, hcd->self.busnum);
+	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+	del_timer_sync(&hcd->rh_timer);
+
+	if (xhci->shared_hcd) {
+		clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
+		del_timer_sync(&xhci->shared_hcd->rh_timer);
+	}
+
 	spin_lock_irq(&xhci->lock);
 	xhci_halt(xhci);
 	/* Workaround for spurious wakeups at shutdown with HSW */

From: Zizhuang Deng <[email protected]>

commit b55b38f7cc12da3b9ef36e7a3b7f8f96737df4d5 upstream.

The third call to fwnode_property_read_u32 did not record the return value, resulting in channel_offstate possibly being assigned the wrong value.

---
 drivers/iio/dac/ad5592r-base.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -532,7 +532,7 @@ static int ad5592r_alloc_channels(struct
 		if (!ret)
 			st->channel_modes[reg] = tmp;
 
-		fwnode_property_read_u32(child, "adi,off-state", &tmp);
+		ret = fwnode_property_read_u32(child, "adi,off-state", &tmp);
 		if (!ret)
 			st->channel_offstate[reg] = tmp;
 	}

From: Michael Hennerich <[email protected]>

commit 89a01cd688d3c0ac983ef0b0e5f40018ab768317 upstream.

read_raw should return the un-scaled value.

---
 drivers/iio/dac/ad5446.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -171,7 +171,7 @@ static int ad5446_read_raw(struct iio_de
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		*val = st->cached_val;
+		*val = st->cached_val >> chan->scan_type.shift;
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
 		*val = st->vref_mv;

From: Zheyu Ma <[email protected]>

commit 3a26787dacf04257a68b16315c984eb2c340bc5e upstream.

When the driver fails to enable the regulator 'vid', we will get the following splat:

[   79.955610] WARNING: CPU: 5 PID: 441 at drivers/regulator/core.c:2257 _regulator_put+0x3ec/0x4e0
[   79.959641] RIP: 0010:_regulator_put+0x3ec/0x4e0
[   79.967570] Call Trace:
[   79.967773]  <TASK>
[   79.967951]  regulator_put+0x1f/0x30
[   79.968254]  devres_release_group+0x319/0x3d0
[   79.968608]  i2c_device_probe+0x766/0x940

Fix this by disabling the 'vdd' regulator when failing to enable 'vid' regulator.

---
 drivers/iio/magnetometer/ak8975.c |    1 +
 1 file changed, 1 insertion(+)

@@ -404,6 +404,7 @@ static int ak8975_power_on(const struct
 	if (ret) {
 		dev_warn(&data->client->dev,
 			 "Failed to enable specified Vid supply\n");
+		regulator_disable(data->vdd);
 		return ret;
 	}
 	/*

From: Hangyu Hua <[email protected]>

commit 0a96fa640dc928da9eaa46a22c46521b037b78ad upstream.

usb_put_dev shouldn't be called when uss720_probe succeeds because of priv->usbdev. At the same time, priv->usbdev shouldn't be set to NULL before destroy_priv in uss720_disconnect because usb_put_dev is in destroy_priv.

Fix this by moving priv->usbdev = NULL after usb_put_dev.

---
 drivers/usb/misc/uss720.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

@@ -87,6 +87,7 @@ static void destroy_priv(struct kref *kr
 
 	dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n");
 	usb_put_dev(priv->usbdev);
+	priv->usbdev = NULL;
 	kfree(priv);
 }
 

@@ -750,7 +751,6 @@ static int uss720_probe(struct usb_inter
 	parport_announce_port(pp);
 
 	usb_set_intfdata(intf, pp);
-	usb_put_dev(usbdev);
 	return 0;
 
 probe_abort:

@@ -770,7 +770,6 @@ static void uss720_disconnect(struct usb
 	if (pp) {
 		priv = pp->private_data;
 		usbdev = priv->usbdev;
-		priv->usbdev = NULL;
 		priv->pp = NULL;
 		dev_dbg(&intf->dev, "parport_remove_port\n");
 		parport_remove_port(pp);

From: Dan Vacura <[email protected]>

commit 71d471e3faf90c9674cadc7605ac719e82cb7fac upstream.

During the uvcg_video_pump() process, if an error occurs and uvcg_queue_cancel() is called, the buffer queue will be cleared out, but the current marker (queue->buf_used) of the active buffer (no longer active) is not reset. On the next iteration of uvcg_video_pump() the stale buf_used count will be used and the logic of min((unsigned int)len, buf->bytesused - queue->buf_used) may incorrectly calculate a nbytes size, causing an invalid memory access.

[80802.185460][  T315] configfs-gadget gadget: uvc: VS request completed
with status -18.
[80802.185519][  T315] configfs-gadget gadget: uvc: VS request completed

with status -18.
...
uvcg_queue_cancel() is called and the queue is cleared out, but the marker queue->buf_used is not reset.
...

[80802.262328][ T8682] Unable to handle kernel paging request at virtual
address ffffffc03af9f000
...
...
[80802.263138][ T8682] Call trace:
[80802.263146][ T8682]  __memcpy+0x12c/0x180
[80802.263155][ T8682]  uvcg_video_pump+0xcc/0x1e0
[80802.263165][ T8682]  process_one_work+0x2cc/0x568
[80802.263173][ T8682]  worker_thread+0x28c/0x518
[80802.263181][ T8682]  kthread+0x160/0x170
[80802.263188][ T8682]  ret_from_fork+0x10/0x18
[80802.263198][ T8682] Code: a8c12829 a88130cb a8c130

---
 drivers/usb/gadget/function/uvc_queue.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -246,6 +246,8 @@ void uvcg_queue_cancel(struct uvc_video_
 		buf->state = UVC_BUF_STATE_ERROR;
 		vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_ERROR);
 	}
+	queue->buf_used = 0;
+
 	/* This must be protected by the irqlock spinlock to avoid race
 	 * conditions between uvc_queue_buffer and the disconnection event that
 	 * could result in an interruptible wait in uvc_dequeue_buffer. Do not

From: Vijayavardhan Vennapusa <[email protected]>

commit bf95c4d4630c7a2c16e7b424fdea5177d9ce0864 upstream.

If any function like UVC is deactivating gadget as part of composition switch which results in not calling pullup enablement, it is not getting enabled after switch to new composition due to this deactivation flag not cleared. This results in USB enumeration not happening after switch to new USB composition. Hence clear deactivation flag inside gadget structure in configfs_composite_unbind() before switch to new USB composition.

---
 drivers/usb/gadget/configfs.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -1409,6 +1409,8 @@ static void configfs_composite_unbind(st
 	usb_ep_autoconfig_reset(cdev->gadget);
 	spin_lock_irqsave(&gi->spinlock, flags);
 	cdev->gadget = NULL;
+	cdev->deactivations = 0;
+	gadget->deactivated = false;
 	set_gadget_data(gadget, NULL);
 	spin_unlock_irqrestore(&gi->spinlock, flags);
 }

From: Maciej W. Rozycki <[email protected]>

commit 6e6eebdf5e2455f089ccd000754a0deaeb79af82 upstream.

Sticky MCR bits are lost in console restoration if console suspending has been disabled. This currently affects the AFE bit, which works in combination with RTS which we set, so we want to make sure the UART retains control of its FIFO where previously requested. Also specific drivers may need other bits in the future.

---
 drivers/tty/serial/8250/8250_port.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -3150,7 +3150,7 @@ static void serial8250_console_restore(s
 
 	serial8250_set_divisor(port, baud, quot, frac);
 	serial_port_out(port, UART_LCR, up->lcr);
-	serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS);
+	serial8250_out_MCR(up, up->mcr | UART_MCR_DTR | UART_MCR_RTS);
 }
 
 /*

From: Maciej W. Rozycki <[email protected]>

commit 637674fa40059cddcc3ad2212728965072f62ea3 upstream.

The EndRun PTP/1588 dual serial port device is based on the Oxford Semiconductor OXPCIe952 UART device with the PCI vendor:device ID set for EndRun Technologies and is therefore driven by a fixed 62.5MHz clock input derived from the 100MHz PCI Express clock. The clock rate is divided by the oversampling rate of 16 as it is supplied to the baud rate generator, yielding the baud base of 3906250.

Replace the incorrect baud base of 4000000 with the right value of 3906250 then, complementing commit 6cbe45d8ac93 ("serial: 8250: Correct the clock for OxSemi PCIe devices").

---
 drivers/tty/serial/8250/8250_pci.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

@@ -2915,7 +2915,7 @@ enum pci_board_num_t {
 	pbn_panacom2,
 	pbn_panacom4,
 	pbn_plx_romulus,
-	pbn_endrun_2_4000000,
+	pbn_endrun_2_3906250,
 	pbn_oxsemi,
 	pbn_oxsemi_1_4000000,
 	pbn_oxsemi_2_4000000,

@@ -3479,10 +3479,10 @@ static struct pciserial_board pci_boards
 	* signal now many ports are available
 	* 2 port 952 Uart support
 	*/
-	[pbn_endrun_2_4000000] = {
+	[pbn_endrun_2_3906250] = {
 		.flags		= FL_BASE0,
 		.num_ports	= 2,
-		.base_baud	= 4000000,
+		.base_baud	= 3906250,
 		.uart_offset	= 0x200,
 		.first_offset	= 0x1000,
 	},

@@ -4430,7 +4430,7 @@ static struct pci_device_id serial_pci_t
 	*/
 	{	PCI_VENDOR_ID_ENDRUN, PCI_DEVICE_ID_ENDRUN_1588,
 		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
-		pbn_endrun_2_4000000 },
+		pbn_endrun_2_3906250 },
 	/*
 	 * Quatech cards. These actually have configurable clocks but for
 	 * now we just use the default.

From: Mikulas Patocka <[email protected]>

commit e5be15767e7e284351853cbaba80cde8620341fb upstream.

The function hex2bin is used to load cryptographic keys into device mapper targets dm-crypt and dm-integrity. It should take constant time independent on the processed data, so that concurrently running unprivileged code can't infer any information about the keys via microarchitectural convert channels.

This patch changes the function hex_to_bin so that it contains no branches and no memory accesses.

Note that this shouldn't cause performance degradation because the size of the new function is the same as the size of the old function (on x86-64) - and the new function causes no branch misprediction penalties.

I compile-tested this function with gcc on aarch64 alpha arm hppa hppa64 i386 ia64 m68k mips32 mips64 powerpc powerpc64 riscv sh4 s390x sparc32 sparc64 x86_64 and with clang on aarch64 arm hexagon i386 mips32 mips64 powerpc powerpc64 s390x sparc32 sparc64 x86_64 to verify that there are no branches in the generated code.

---
 include/linux/kernel.h |    2 +-
 lib/hexdump.c          |   32 +++++++++++++++++++++++++-------
 2 files changed, 26 insertions(+), 8 deletions(-)

@@ -530,7 +530,7 @@ static inline char *hex_byte_pack_upper(
 	return buf;
 }
 
-extern int hex_to_bin(char ch);
+extern int hex_to_bin(unsigned char ch);
 extern int __must_check hex2bin(u8 *dst, const char *src, size_t count);
 extern char *bin2hex(char *dst, const void *src, size_t count);
 

@@ -24,15 +24,33 @@ EXPORT_SYMBOL(hex_asc_upper);
  *
  * hex_to_bin() converts one hex digit to its actual value or -1 in case of bad
  * input.
+ *
+ * This function is used to load cryptographic keys, so it is coded in such a
+ * way that there are no conditions or memory accesses that depend on data.
+ *
+ * Explanation of the logic:
+ * (ch - '9' - 1) is negative if ch <= '9'
+ * ('0' - 1 - ch) is negative if ch >= '0'
+ * we "and" these two values, so the result is negative if ch is in the range
+ *	'0' ... '9'
+ * we are only interested in the sign, so we do a shift ">> 8"; note that right
+ *	shift of a negative value is implementation-defined, so we cast the
+ *	value to (unsigned) before the shift --- we have 0xffffff if ch is in
+ *	the range '0' ... '9', 0 otherwise
+ * we "and" this value with (ch - '0' + 1) --- we have a value 1 ... 10 if ch is
+ *	in the range '0' ... '9', 0 otherwise
+ * we add this value to -1 --- we have a value 0 ... 9 if ch is in the range '0'
+ *	... '9', -1 otherwise
+ * the next line is similar to the previous one, but we need to decode both
+ *	uppercase and lowercase letters, so we use (ch & 0xdf), which converts
+ *	lowercase to uppercase
  */
-int hex_to_bin(char ch)
+int hex_to_bin(unsigned char ch)
 {
-	if ((ch >= '0') && (ch <= '9'))
-		return ch - '0';
-	ch = tolower(ch);
-	if ((ch >= 'a') && (ch <= 'f'))
-		return ch - 'a' + 10;
-	return -1;
+	unsigned char cu = ch & 0xdf;
+	return -1 +
+		((ch - '0' +  1) & (unsigned)((ch - '9' - 1) & ('0' - 1 - ch)) >> 8) +
+		((cu - 'A' + 11) & (unsigned)((cu - 'F' - 1) & ('A' - 1 - cu)) >> 8);
 }
 EXPORT_SYMBOL(hex_to_bin);
 

From: Mikulas Patocka <[email protected]>

commit e4d8a29997731b3bb14059024b24df9f784288d0 upstream.

If we pass too short string to "hex2bin" (and the string size without the terminating NUL character is even), "hex2bin" reads one byte after the terminating NUL character. This patch fixes it.

Note that hex_to_bin returns -1 on error and hex2bin return -EINVAL on error - so we can't just return the variable "hi" or "lo" on error. This inconsistency may be fixed in the next merge window, but for the purpose of fixing this bug, we just preserve the existing behavior and return -1 and -EINVAL.

---
 lib/hexdump.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

@@ -65,10 +65,13 @@ EXPORT_SYMBOL(hex_to_bin);
 int hex2bin(u8 *dst, const char *src, size_t count)
 {
 	while (count--) {
-		int hi = hex_to_bin(*src++);
-		int lo = hex_to_bin(*src++);
+		int hi, lo;
 
-		if ((hi < 0) || (lo < 0))
+		hi = hex_to_bin(*src++);
+		if (unlikely(hi < 0))
+			return -1;
+		lo = hex_to_bin(*src++);
+		if (unlikely(lo < 0))
 			return -1;
 
 		*dst++ = (hi << 4) | lo;

From: Fabio Estevam <[email protected]>

[ Upstream commit fa51e1dc4b91375bc18349663a52395ad585bd3c ]

On a custom carrier board with a i.MX6Q Apalis SoM, the sgtl5000 codec on the SoM is often not detected and the following error message is seen when the sgtl5000 driver tries to read the ID register:

sgtl5000 1-000a: Error reading chip id -6

The reason for the error is that the MCLK clock is not provided early enough.

Fix the problem by describing the MCLK pinctrl inside the codec node instead of placing it inside the audmux pinctrl group.

With this change applied the sgtl5000 is always detected on every boot.

---
 arch/arm/boot/dts/imx6qdl-apalis.dtsi | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

index 99e323b57261..cbe7b0dcb6eb 100644
@@ -324,6 +324,8 @@ vgen6_reg: vgen6 {
 	codec: sgtl5000@0a {
 		compatible = "fsl,sgtl5000";
 		reg = <0x0a>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_sgtl5000>;
 		clocks = <&clks IMX6QDL_CLK_CKO>;
 		VDDA-supply = <&reg_2p5v>;
 		VDDIO-supply = <&reg_3p3v>;

@@ -550,8 +552,6 @@ MX6QDL_PAD_DISP0_DAT20__AUD4_TXC	0x130b0
 			MX6QDL_PAD_DISP0_DAT21__AUD4_TXD	0x130b0
 			MX6QDL_PAD_DISP0_DAT22__AUD4_TXFS	0x130b0
 			MX6QDL_PAD_DISP0_DAT23__AUD4_RXD	0x130b0
-			/* SGTL5000 sys_mclk */
-			MX6QDL_PAD_GPIO_5__CCM_CLKO1		0x130b0
 		>;
 	};
 

@@ -812,6 +812,12 @@ MX6QDL_PAD_NANDF_CS1__GPIO6_IO14 0x000b0
 		>;
 	};
 
+	pinctrl_sgtl5000: sgtl5000grp {
+		fsl,pins = <
+			MX6QDL_PAD_GPIO_5__CCM_CLKO1	0x130b0
+		>;
+	};
+
 	pinctrl_spdif: spdifgrp {
 		fsl,pins = <
 			MX6QDL_PAD_GPIO_16__SPDIF_IN  0x1b0b0

2.35.1

From: Miaoqian Lin <[email protected]>

[ Upstream commit 388ec8f079f2f20d5cd183c3bc6f33cbc3ffd3ef ]

The device_node pointer is returned by of_parse_phandle() with refcount incremented. We should use of_node_put() on it when done.

---
 drivers/phy/phy-exynos5250-sata.c | 1 +
 1 file changed, 1 insertion(+)

index 60e13afcd9b8..7960c69d09a6 100644
@@ -193,6 +193,7 @@ static int exynos_sata_phy_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	sata_phy->client = of_find_i2c_device_by_node(node);
+	of_node_put(node);
 	if (!sata_phy->client)
 		return -EPROBE_DEFER;
 

2.35.1

From: Krzysztof Kozlowski <[email protected]>

[ Upstream commit 5c8402c4db45dd55c2c93c8d730f5dfa7c78a702 ]

The actions of of_find_i2c_device_by_node() in probe function should be reversed in error paths by putting the reference to obtained device.

---
 drivers/phy/phy-exynos5250-sata.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

index 7960c69d09a6..2c39d2fd3cd8 100644
@@ -202,20 +202,21 @@ static int exynos_sata_phy_probe(struct platform_device *pdev)
 	sata_phy->phyclk = devm_clk_get(dev, "sata_phyctrl");
 	if (IS_ERR(sata_phy->phyclk)) {
 		dev_err(dev, "failed to get clk for PHY\n");
-		return PTR_ERR(sata_phy->phyclk);
+		ret = PTR_ERR(sata_phy->phyclk);
+		goto put_dev;
 	}
 
 	ret = clk_prepare_enable(sata_phy->phyclk);
 	if (ret < 0) {
 		dev_err(dev, "failed to enable source clk\n");
-		return ret;
+		goto put_dev;
 	}
 
 	sata_phy->phy = devm_phy_create(dev, NULL, &exynos_sata_phy_ops);
 	if (IS_ERR(sata_phy->phy)) {
-		clk_disable_unprepare(sata_phy->phyclk);
 		dev_err(dev, "failed to create PHY\n");
-		return PTR_ERR(sata_phy->phy);
+		ret = PTR_ERR(sata_phy->phy);
+		goto clk_disable;
 	}
 
 	phy_set_drvdata(sata_phy->phy, sata_phy);

@@ -223,11 +224,18 @@ static int exynos_sata_phy_probe(struct platform_device *pdev)
 	phy_provider = devm_of_phy_provider_register(dev,
 					of_phy_simple_xlate);
 	if (IS_ERR(phy_provider)) {
-		clk_disable_unprepare(sata_phy->phyclk);
-		return PTR_ERR(phy_provider);
+		ret = PTR_ERR(phy_provider);
+		goto clk_disable;
 	}
 
 	return 0;
+
+clk_disable:
+	clk_disable_unprepare(sata_phy->phyclk);
+put_dev:
+	put_device(&sata_phy->client->dev);
+
+	return ret;
 }
 
 static const struct of_device_id exynos_sata_phy_of_match[] = {

2.35.1

From: Miaoqian Lin <[email protected]>

[ Upstream commit 0f83e6b4161617014017a694888dd8743f46f071 ]

The of_find_compatible_node() function returns a node pointer with refcount incremented, We should use of_node_put() on it when done Add the missing of_node_put() to release the refcount.

Message-Id: <[email protected]>

---
 arch/arm/mach-omap2/omap4-common.c | 2 ++
 1 file changed, 2 insertions(+)

index e5dcbda20129..7fff67ea7bcd 100644
@@ -342,10 +342,12 @@ void __init omap_gic_of_init(void)
 
 	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic");
 	gic_dist_base_addr = of_iomap(np, 0);
+	of_node_put(np);
 	WARN_ON(!gic_dist_base_addr);
 
 	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-twd-timer");
 	twd_base = of_iomap(np, 0);
+	of_node_put(np);
 	WARN_ON(!twd_base);
 
 skip_errata_init:

2.35.1

From: H. Nikolaus Schaller <[email protected]>

[ Upstream commit 09269dd050094593fc747f2a5853d189fefcb6b5 ]

Commit a1ebdb374199 ("ARM: dts: Fix swapped mmc order for omap3") introduces general mmc aliases. Let's tailor them to the need of the GTA04 board which does not make use of mmc2 and mmc3 interfaces.

Message-Id: <dc9173ee3d391d9e92b7ab8ed4f84b29f0a21c83.1646744420.git.hns@goldelico.com>

---
 arch/arm/boot/dts/omap3-gta04.dtsi | 2 ++
 1 file changed, 2 insertions(+)

index 338ee6bd0e0c..ced298d07338 100644
@@ -29,6 +29,8 @@ memory@80000000 {
 	aliases {
 		display0 = &lcd;
 		display1 = &tv0;
+		/delete-property/ mmc2;
+		/delete-property/ mmc3;
 	};
 
 	gpio-keys {

2.35.1

From: Miaoqian Lin <[email protected]>

[ Upstream commit 084c16ab423a8890121b902b405823bfec5b4365 ]

wait_for_completion_timeout() returns unsigned long not int. It returns 0 if timed out, and positive if completed. The check for <= 0 is ambiguous and should be == 0 here indicating timeout which is the only error case.

---
 drivers/mtd/nand/sh_flctl.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

index 31f98acdba07..17e15bd05442 100644
@@ -399,7 +399,8 @@ static int flctl_dma_fifo0_transfer(struct sh_flctl *flctl, unsigned long *buf,
 	dma_addr_t dma_addr;
 	dma_cookie_t cookie;
 	uint32_t reg;
-	int ret;
+	int ret = 0;
+	unsigned long time_left;
 
 	if (dir == DMA_FROM_DEVICE) {
 		chan = flctl->chan_fifo0_rx;

@@ -440,13 +441,14 @@ static int flctl_dma_fifo0_transfer(struct sh_flctl *flctl, unsigned long *buf,
 		goto out;
 	}
 
-	ret =
+	time_left =
 	wait_for_completion_timeout(&flctl->dma_complete,
 				msecs_to_jiffies(3000));
 
-	if (ret <= 0) {
+	if (time_left == 0) {
 		dmaengine_terminate_all(chan);
 		dev_err(&flctl->pdev->dev, "wait_for_completion_timeout\n");
+		ret = -ETIMEDOUT;
 	}
 
 out:

@@ -456,7 +458,7 @@ static int flctl_dma_fifo0_transfer(struct sh_flctl *flctl, unsigned long *buf,
 
 	dma_unmap_single(chan->device->dev, dma_addr, len, dir);
 
-	/* ret > 0 is success */
+	/* ret == 0 is success */
 	return ret;
 }
 

@@ -480,7 +482,7 @@ static void read_fiforeg(struct sh_flctl *flctl, int rlen, int offset)
 
 	/* initiate DMA transfer */
 	if (flctl->chan_fifo0_rx && rlen >= 32 &&
-		flctl_dma_fifo0_transfer(flctl, buf, rlen, DMA_FROM_DEVICE) > 0)
+		!flctl_dma_fifo0_transfer(flctl, buf, rlen, DMA_FROM_DEVICE))
 			goto convert;	/* DMA success */
 
 	/* do polling transfer */

@@ -539,7 +541,7 @@ static void write_ec_fiforeg(struct sh_flctl *flctl, int rlen,
 
 	/* initiate DMA transfer */
 	if (flctl->chan_fifo0_tx && rlen >= 32 &&
-		flctl_dma_fifo0_transfer(flctl, buf, rlen, DMA_TO_DEVICE) > 0)
+		!flctl_dma_fifo0_transfer(flctl, buf, rlen, DMA_TO_DEVICE))
 			return;	/* DMA success */
 
 	/* do polling transfer */

2.35.1

From: Lv Ruyi <[email protected]>

[ Upstream commit 0c9843a74a85224a89daa81fa66891dae2f930e1 ]

The irq_of_parse_and_map() function returns 0 on failure, and does not return an negative value.

---
 drivers/pinctrl/pinctrl-pistachio.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

index b2b7e238bda9..fc8c57527fb7 100644
@@ -1374,10 +1374,10 @@ static int pistachio_gpio_register(struct pistachio_pinctrl *pctl)
 		}
 
 		irq = irq_of_parse_and_map(child, 0);
-		if (irq < 0) {
-			dev_err(pctl->dev, "No IRQ for bank %u: %d\n", i, irq);
+		if (!irq) {
+			dev_err(pctl->dev, "No IRQ for bank %u\n", i);
 			of_node_put(child);
-			ret = irq;
+			ret = -EINVAL;
 			goto err;
 		}
 

2.35.1

From: Peilin Ye <[email protected]>

[ Upstream commit ff827beb706ed719c766acf36449801ded0c17fc ]

For GRE and GRETAP devices, currently o_seqno starts from 1 in native mode. According to RFC 2890 2.2., "The first datagram is sent with a sequence number of 0." Fix it.

It is worth mentioning that o_seqno already starts from 0 in collect_md mode, see gre_fb_xmit(), where tunnel->o_seqno is passed to gre_build_header() before getting incremented.

---
 net/ipv4/ip_gre.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

index fe1801d9f059..eec225c637f0 100644
@@ -339,14 +339,12 @@ static void __gre_xmit(struct sk_buff *skb, struct net_device *dev,
 		       __be16 proto)
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
-
-	if (tunnel->parms.o_flags & TUNNEL_SEQ)
-		tunnel->o_seqno++;
+	__be16 flags = tunnel->parms.o_flags;
 
 	/* Push GRE header. */
 	gre_build_header(skb, tunnel->tun_hlen,
-			 tunnel->parms.o_flags, proto, tunnel->parms.o_key,
-			 htonl(tunnel->o_seqno));
+			 flags, proto, tunnel->parms.o_key,
+			 (flags & TUNNEL_SEQ) ? htonl(tunnel->o_seqno++) : 0);
 
 	ip_tunnel_xmit(skb, dev, tnl_params, tnl_params->protocol);
 }

2.35.1

From: Eric Dumazet <[email protected]>

[ Upstream commit 4bfe744ff1644fbc0a991a2677dc874475dd6776 ]

I had this bug sitting for too long in my pile, it is time to fix it.

Thanks to Doug Porter for reminding me of it!

We had various attempts in the past, including commit 0cbe6a8f089e ("tcp: remove SOCK_QUEUE_SHRUNK"), but the issue is that TCP stack currently only generates EPOLLOUT from input path, when tp->snd_una has advanced and skb(s) cleaned from rtx queue.

If a flow has a big RTT, and/or receives SACKs, it is possible that the notsent part (tp->write_seq - tp->snd_nxt) reaches 0 and no more data can be sent until tp->snd_una finally advances.

What is needed is to also check if POLLOUT needs to be generated whenever tp->snd_nxt is advanced, from output path.

This bug triggers more often after an idle period, as we do not receive ACK for at least one RTT. tcp_notsent_lowat could be a fraction of what CWND and pacing rate would allow to send during this RTT.

In a followup patch, I will remove the bogus call to tcp_chrono_stop(sk, TCP_CHRONO_SNDBUF_LIMITED) from tcp_check_space(). Fact that we have decided to generate an EPOLLOUT does not mean the application has immediately refilled the transmit queue. This optimistic call might have been the reason the bug seemed not too serious.

Tested:

200 ms rtt, 1% packet loss, 32 MB tcp_rmem[2] and tcp_wmem[2]

$ echo 500000 >/proc/sys/net/ipv4/tcp_notsent_lowat
$ cat bench_rr.sh
SUM=0
for i in {1..10}
do
 V=`netperf -H remote_host -l30 -t TCP_RR -- -r 10000000,10000 -o LOCAL_BYTES_SENT | egrep -v "MIGRATED|Bytes"`
 echo $V
 SUM=$(($SUM + $V))
done
echo SUM=$SUM

Before patch:

$ bench_rr.sh
130000000
80000000
140000000
140000000
140000000
140000000
130000000
40000000
90000000
110000000
SUM=1140000000

After patch:

$ bench_rr.sh
430000000
590000000
530000000
450000000
450000000
350000000
450000000
490000000
480000000
460000000
SUM=4680000000  # This is 410 % of the value before patch.

---
 include/net/tcp.h     |  1 +
 net/ipv4/tcp_input.c  | 12 +++++++++++-
 net/ipv4/tcp_output.c |  1 +
 3 files changed, 13 insertions(+), 1 deletion(-)

index f26f075250b4..97df2f6fcbd7 100644
@@ -579,6 +579,7 @@ void tcp_synack_rtt_meas(struct sock *sk, struct request_sock *req);
 void tcp_reset(struct sock *sk);
 void tcp_skb_mark_lost_uncond_verify(struct tcp_sock *tp, struct sk_buff *skb);
 void tcp_fin(struct sock *sk);
+void tcp_check_space(struct sock *sk);
 
 /* tcp_timer.c */
 void tcp_init_xmit_timers(struct sock *);

index 01c73775ed00..7f48f8504284 100644
@@ -5159,7 +5159,17 @@ static void tcp_new_space(struct sock *sk)
 	sk->sk_write_space(sk);
 }
 
-static void tcp_check_space(struct sock *sk)
+/* Caller made space either from:
+ * 1) Freeing skbs in rtx queues (after tp->snd_una has advanced)
+ * 2) Sent skbs from output queue (and thus advancing tp->snd_nxt)
+ *
+ * We might be able to generate EPOLLOUT to the application if:
+ * 1) Space consumed in output/rtx queues is below sk->sk_sndbuf/2
+ * 2) notsent amount (tp->write_seq - tp->snd_nxt) became
+ *    small enough that tcp_stream_memory_free() decides it
+ *    is time to generate EPOLLOUT.
+ */
+void tcp_check_space(struct sock *sk)
 {
 	if (sock_flag(sk, SOCK_QUEUE_SHRUNK)) {
 		sock_reset_flag(sk, SOCK_QUEUE_SHRUNK);

index aafea53c7c06..95b0f486cb10 100644
@@ -83,6 +83,7 @@ static void tcp_event_new_data_sent(struct sock *sk, const struct sk_buff *skb)
 
 	NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPORIGDATASENT,
 		      tcp_skb_pcount(skb));
+	tcp_check_space(sk);
 }
 
 /* SND.NXT, if window was not shrunk.

2.35.1

From: Christophe JAILLET <[email protected]>

[ Upstream commit fff8c10368e64e7f8960f149375c12ca5f3b30af ]

This code is really spurious.
It always returns an ERR_PTR, even when err is known to be 0 and calls put_device() after a successful device_register() call.

It is likely that the return statement in the normal path is missing. Add 'return rdev;' to fix it.

---
 drivers/bus/sunxi-rsb.c | 2 ++
 1 file changed, 2 insertions(+)

index 4f3d988210b0..ce5b976a8856 100644
@@ -224,6 +224,8 @@ static struct sunxi_rsb_device *sunxi_rsb_device_create(struct sunxi_rsb *rsb,
 
 	dev_dbg(&rdev->dev, "device %s registered\n", dev_name(&rdev->dev));
 
+	return rdev;
+
 err_device_add:
 	put_device(&rdev->dev);
 

2.35.1

From: Yang Yingliang <[email protected]>

[ Upstream commit f58ca215cda1975f77b2b762903684a3c101bec9 ]

It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value.

---
 drivers/clk/sunxi/clk-sun9i-mmc.c | 2 ++
 1 file changed, 2 insertions(+)

index f69f9e8c6f38..7e9d1624032f 100644
@@ -117,6 +117,8 @@ static int sun9i_a80_mmc_config_clk_probe(struct platform_device *pdev)
 	spin_lock_init(&data->lock);
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!r)
+		return -EINVAL;
 	/* one clock/reset pair per word */
 	count = DIV_ROUND_UP((resource_size(r)), SUN9I_MMC_WIDTH);
 	data->membase = devm_ioremap_resource(&pdev->dev, r);

2.35.1

From: Manish Chopra <[email protected]>

[ Upstream commit af68656d66eda219b7f55ce8313a1da0312c79e1 ]

While handling PCI errors (AER flow) driver tries to disable NAPI [napi_disable()] after NAPI is deleted [__netif_napi_del()] which causes unexpected system hang/crash.

System message log shows the following:
=======================================

[ 3222.537510] EEH: Detected PCI bus error on PHB#384-PE#800000 [ 3222.537511] EEH: This PCI device has failed 2 times in the last hour and will be permanently disabled after 5 failures.
[ 3222.537512] EEH: Notify device drivers to shutdown [ 3222.537513] EEH: Beginning: 'error_detected(IO frozen)'
[ 3222.537514] EEH: PE#800000 (PCI 0384:80:00.0): Invoking
bnx2x->error_detected(IO frozen)
[ 3222.537516] bnx2x: [bnx2x_io_error_detected:14236(eth14)]IO error detected [ 3222.537650] EEH: PE#800000 (PCI 0384:80:00.0): bnx2x driver reports:
'need reset'
[ 3222.537651] EEH: PE#800000 (PCI 0384:80:00.1): Invoking
bnx2x->error_detected(IO frozen)
[ 3222.537651] bnx2x: [bnx2x_io_error_detected:14236(eth13)]IO error detected [ 3222.537729] EEH: PE#800000 (PCI 0384:80:00.1): bnx2x driver reports:
'need reset'
[ 3222.537729] EEH: Finished:'error_detected(IO frozen)' with aggregate recovery state:'need reset'
[ 3222.537890] EEH: Collect temporary log [ 3222.583481] EEH: of node=0384:80:00.0 [ 3222.583519] EEH: PCI device/vendor: 168e14e4 [ 3222.583557] EEH: PCI cmd/status register: 00100140 [ 3222.583557] EEH: PCI-E capabilities and status follow:
[ 3222.583744] EEH: PCI-E 00: 00020010 012c8da2 00095d5e 00455c82 [ 3222.583892] EEH: PCI-E 10: 10820000 00000000 00000000 00000000 [ 3222.583893] EEH: PCI-E 20: 00000000 [ 3222.583893] EEH: PCI-E AER capability register set follows:
[ 3222.584079] EEH: PCI-E AER 00: 13c10001 00000000 00000000 00062030 [ 3222.584230] EEH: PCI-E AER 10: 00002000 000031c0 000001e0 00000000 [ 3222.584378] EEH: PCI-E AER 20: 00000000 00000000 00000000 00000000 [ 3222.584416] EEH: PCI-E AER 30: 00000000 00000000 [ 3222.584416] EEH: of node=0384:80:00.1 [ 3222.584454] EEH: PCI device/vendor: 168e14e4 [ 3222.584491] EEH: PCI cmd/status register: 00100140 [ 3222.584492] EEH: PCI-E capabilities and status follow:
[ 3222.584677] EEH: PCI-E 00: 00020010 012c8da2 00095d5e 00455c82 [ 3222.584825] EEH: PCI-E 10: 10820000 00000000 00000000 00000000 [ 3222.584826] EEH: PCI-E 20: 00000000 [ 3222.584826] EEH: PCI-E AER capability register set follows:
[ 3222.585011] EEH: PCI-E AER 00: 13c10001 00000000 00000000 00062030 [ 3222.585160] EEH: PCI-E AER 10: 00002000 000031c0 000001e0 00000000 [ 3222.585309] EEH: PCI-E AER 20: 00000000 00000000 00000000 00000000 [ 3222.585347] EEH: PCI-E AER 30: 00000000 00000000 [ 3222.586872] RTAS: event: 5, Type: Platform Error (224), Severity: 2 [ 3222.586873] EEH: Reset without hotplug activity [ 3224.762767] EEH: Beginning: 'slot_reset'
[ 3224.762770] EEH: PE#800000 (PCI 0384:80:00.0): Invoking
bnx2x->slot_reset()
[ 3224.762771] bnx2x: [bnx2x_io_slot_reset:14271(eth14)]IO slot reset initializing...
[ 3224.762887] bnx2x 0384:80:00.0: enabling device (0140 -> 0142) [ 3224.768157] bnx2x: [bnx2x_io_slot_reset:14287(eth14)]IO slot reset

--> driver unload

Uninterruptible tasks
=====================
crash> ps | grep UN

     213      2  11  c000000004c89e00  UN   0.0       0      0  [eehd]
     215      2   0  c000000004c80000  UN   0.0       0      0
[kworker/0:2]
    2196      1  28  c000000004504f00  UN   0.1   15936  11136  wickedd
    4287      1   9  c00000020d076800  UN   0.0    4032   3008  agetty
    4289      1  20  c00000020d056680  UN   0.0    7232   3840  agetty
   32423      2  26  c00000020038c580  UN   0.0       0      0
[kworker/26:3]
   32871   4241  27  c0000002609ddd00  UN   0.1   18624  11648  sshd
   32920  10130  16  c00000027284a100  UN   0.1   48512  12608  sendmail
   33092  32987   0  c000000205218b00  UN   0.1   48512  12608  sendmail
   33154   4567  16  c000000260e51780  UN   0.1   48832  12864  pickup
   33209   4241  36  c000000270cb6500  UN   0.1   18624  11712  sshd
   33473  33283   0  c000000205211480  UN   0.1   48512  12672  sendmail
   33531   4241  37  c00000023c902780  UN   0.1   18624  11648  sshd

EEH handler hung while bnx2x sleeping and holding RTNL lock
===========================================================
crash> bt 213
PID: 213 TASK: c000000004c89e00 CPU: 11 COMMAND: "eehd"
#0 [c000000004d477e0] __schedule at c000000000c70808 #1 [c000000004d478b0] schedule at c000000000c70ee0 #2 [c000000004d478e0] schedule_timeout at c000000000c76dec #3 [c000000004d479c0] msleep at c0000000002120cc #4 [c000000004d479f0] napi_disable at c000000000a06448

                                        ^^^^^^^^^^^^^^^^

#5 [c000000004d47a30] bnx2x_netif_stop at c0080000018dba94 [bnx2x] #6 [c000000004d47a60] bnx2x_io_slot_reset at c0080000018a551c [bnx2x] #7 [c000000004d47b20] eeh_report_reset at c00000000004c9bc #8 [c000000004d47b90] eeh_pe_report at c00000000004d1a8
#9 [c000000004d47c40] eeh_handle_normal_event at c00000000004da64

And the sleeping source code
============================
crash> dis -ls c000000000a06448
FILE: ../net/core/dev.c
LINE: 6702

6697 {
6698 might_sleep();
6699 set_bit(NAPI_STATE_DISABLE, &n->state);
6700
6701 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
* 6702 msleep(1);
6703 while (test_and_set_bit(NAPI_STATE_NPSVC, &n->state))
6704 msleep(1);
6705
6706 hrtimer_cancel(&n->timer);
6707
6708 clear_bit(NAPI_STATE_DISABLE, &n->state);
6709 }

EEH calls into bnx2x twice based on the system log above, first through bnx2x_io_error_detected() and then bnx2x_io_slot_reset(), and executes the following call chains:

bnx2x_io_error_detected()

  +-> bnx2x_eeh_nic_unload()
       +-> bnx2x_del_all_napi()
            +-> __netif_napi_del()

bnx2x_io_slot_reset()

  +-> bnx2x_netif_stop()
       +-> bnx2x_napi_disable()
            +->napi_disable()

Fix this by correcting the sequence of NAPI APIs usage, that is delete the NAPI after disabling it.

---
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

index 8d17d464c067..398928642a97 100644
@@ -14314,10 +14314,6 @@ static int bnx2x_eeh_nic_unload(struct bnx2x *bp)
 
 	/* Stop Tx */
 	bnx2x_tx_disable(bp);
-	/* Delete all NAPI objects */
-	bnx2x_del_all_napi(bp);
-	if (CNIC_LOADED(bp))
-		bnx2x_del_all_napi_cnic(bp);
 	netdev_reset_tc(bp->dev);
 
 	del_timer_sync(&bp->timer);

@@ -14422,6 +14418,11 @@ static pci_ers_result_t bnx2x_io_slot_reset(struct pci_dev *pdev)
 		bnx2x_drain_tx_queues(bp);
 		bnx2x_send_unload_req(bp, UNLOAD_RECOVERY);
 		bnx2x_netif_stop(bp, 1);
+		bnx2x_del_all_napi(bp);
+
+		if (CNIC_LOADED(bp))
+			bnx2x_del_all_napi_cnic(bp);
+
 		bnx2x_free_irq(bp);
 
 		/* Report UNLOAD_DONE to MCP */

2.35.1

From: Zheyu Ma <[email protected]>

[ Upstream commit 92ccbf17eeacf510cf1eed9c252d9332ca24f02d ]

When the driver fails during probing, the driver should disable the regulator, not just handle it in wm8731_hw_init().

The following log reveals it:

[   17.812483] WARNING: CPU: 1 PID: 364 at drivers/regulator/core.c:2257 _regulator_put+0x3ec/0x4e0
[   17.815958] RIP: 0010:_regulator_put+0x3ec/0x4e0
[   17.824467] Call Trace:
[   17.824774]  <TASK>
[   17.825040]  regulator_bulk_free+0x82/0xe0
[   17.825514]  devres_release_group+0x319/0x3d0
[   17.825882]  i2c_device_probe+0x766/0x940
[   17.829198]  i2c_register_driver+0xb5/0x130

---
 sound/soc/codecs/wm8731.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

index 4f9a1eb28120..abe5e77ba171 100644
@@ -604,7 +604,7 @@ static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
 	ret = wm8731_reset(wm8731->regmap);
 	if (ret < 0) {
 		dev_err(dev, "Failed to issue reset: %d\n", ret);
-		goto err_regulator_enable;
+		goto err;
 	}
 
 	/* Clear POWEROFF, keep everything else disabled */

@@ -621,10 +621,7 @@ static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
 
 	regcache_mark_dirty(wm8731->regmap);
 
-err_regulator_enable:
-	/* Regulators will be enabled by bias management */
-	regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
-
+err:
 	return ret;
 }
 

@@ -768,21 +765,27 @@ static int wm8731_i2c_probe(struct i2c_client *i2c,
 		ret = PTR_ERR(wm8731->regmap);
 		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 			ret);
-		return ret;
+		goto err_regulator_enable;
 	}
 
 	ret = wm8731_hw_init(&i2c->dev, wm8731);
 	if (ret != 0)
-		return ret;
+		goto err_regulator_enable;
 
 	ret = snd_soc_register_codec(&i2c->dev,
 			&soc_codec_dev_wm8731, &wm8731_dai, 1);
 	if (ret != 0) {
 		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
-		return ret;
+		goto err_regulator_enable;
 	}
 
 	return 0;
+
+err_regulator_enable:
+	/* Regulators will be enabled by bias management */
+	regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
+
+	return ret;
 }
 
 static int wm8731_i2c_remove(struct i2c_client *client)

2.35.1

From: Duoming Zhou <[email protected]>

[ Upstream commit bc6de2878429e85c1f1afaa566f7b5abb2243eef ]

There is a deadlock in rr_close(), which is shown below:

   (Thread 1)                |      (Thread 2)
                             | rr_open()
rr_close()                   |  add_timer()
 spin_lock_irqsave() //(1)   |  (wait a time)
 ...                         | rr_timer()
 del_timer_sync()            |  spin_lock_irqsave() //(2)
 (wait timer to stop)        |  ...

We hold rrpriv->lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need rrpriv->lock in position (2) of thread 2. As a result, rr_close() will block forever.

This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.

---
 drivers/net/hippi/rrunner.c | 2 ++
 1 file changed, 2 insertions(+)

index 6f3519123eb6..0e1a422d9567 100644
@@ -1354,7 +1354,9 @@ static int rr_close(struct net_device *dev)
 
 	rrpriv->fw_running = 0;
 
+	spin_unlock_irqrestore(&rrpriv->lock, flags);
 	del_timer_sync(&rrpriv->timer);
+	spin_lock_irqsave(&rrpriv->lock, flags);
 
 	writel(0, &regs->TxPi);
 	writel(0, &regs->IpRxPi);

2.35.1

From: Borislav Petkov <[email protected]>

commit f9e14dbbd454581061c736bf70bf5cbb15ac927c upstream.

When resuming from system sleep state, restore_processor_state() restores the boot CPU MSRs. These MSRs could be emulated by microcode. If microcode is not loaded yet, writing to emulated MSRs leads to unchecked MSR access error:

...
PM: Calling lapic_suspend+0x0/0x210
unchecked MSR access error: WRMSR to 0x10f (tried to write 0x0...0) at rIP: ... (native_write_msr)

  Call Trace:
    <TASK>
    ? restore_processor_state
    x86_acpi_suspend_lowlevel
    acpi_suspend_enter
    suspend_devices_and_enter
    pm_suspend.cold
    state_store
    kobj_attr_store
    sysfs_kf_write
    kernfs_fop_write_iter
    new_sync_write
    vfs_write
    ksys_write
    __x64_sys_write
    do_syscall_64
    entry_SYSCALL_64_after_hwframe
   RIP: 0033:0x7fda13c260a7

To ensure microcode emulated MSRs are available for restoration, load the microcode on the boot CPU before restoring these MSRs.

[ Pawan: write commit message and productize it. ]

---
 arch/x86/include/asm/microcode.h     |    2 ++
 arch/x86/kernel/cpu/microcode/core.c |    6 +++---
 arch/x86/power/cpu.c                 |    8 ++++++++
 3 files changed, 13 insertions(+), 3 deletions(-)

@@ -135,10 +135,12 @@ extern void __init load_ucode_bsp(void);
 extern void load_ucode_ap(void);
 void reload_early_microcode(void);
 extern bool get_builtin_firmware(struct cpio_data *cd, const char *name);
+void microcode_bsp_resume(void);
 #else
 static inline void __init load_ucode_bsp(void)			{ }
 static inline void load_ucode_ap(void)				{ }
 static inline void reload_early_microcode(void)			{ }
+static inline void microcode_bsp_resume(void)			{ }
 static inline bool
 get_builtin_firmware(struct cpio_data *cd, const char *name)	{ return false; }
 #endif

@@ -586,9 +586,9 @@ static struct subsys_interface mc_cpu_in
 };
 
 /**
- * mc_bp_resume - Update boot CPU microcode during resume.
+ * microcode_bsp_resume - Update boot CPU microcode during resume.
  */
-static void mc_bp_resume(void)
+void microcode_bsp_resume(void)
 {
 	int cpu = smp_processor_id();
 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;

@@ -600,7 +600,7 @@ static void mc_bp_resume(void)
 }
 
 static struct syscore_ops mc_syscore_ops = {
-	.resume			= mc_bp_resume,
+	.resume			= microcode_bsp_resume,
 };
 
 static int mc_cpu_online(unsigned int cpu)

@@ -26,6 +26,7 @@
 #include <asm/cpu.h>
 #include <asm/mmu_context.h>
 #include <asm/cpu_device_id.h>
+#include <asm/microcode.h>
 
 #ifdef CONFIG_X86_32
 __visible unsigned long saved_context_ebx;

@@ -261,6 +262,13 @@ static void notrace __restore_processor_
 	x86_platform.restore_sched_clock_state();
 	mtrr_bp_restore();
 	perf_restore_debug_store();
+
+	microcode_bsp_resume();
+
+	/*
+	 * This needs to happen after the microcode has been updated upon resume
+	 * because some of the MSRs are "emulated" in microcode.
+	 */
 	msr_restore_context(ctxt);
 }
 

From: Daniel Starke <[email protected]>

commit 06d5afd4d640eea67f5623e76cd5fc03359b7f3c upstream.

n_gsm is based on the 3GPP 07.010 and its newer version is the 3GPP 27.010.
See https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516
The changes from 07.010 to 27.010 are non-functional. Therefore, I refer to
the newer 27.010 here. Chapter 5.5.2 describes that the signal octet in
convergence layer type 2 can be either one or two bytes. The length is
encoded in the EA bit. This is set 1 for the last byte in the sequence. gsmtty_modem_update() handles this correctly but gsm_dlci_data_output()
fails to set EA to 1. There is no case in which we encode two signal octets
as there is no case in which we send out a break signal.
Therefore, always set the EA bit to 1 for the signal octet to fix this.

---
 drivers/tty/n_gsm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -839,7 +839,7 @@ static int gsm_dlci_data_output(struct g
 			break;
 		case 2:	/* Unstructed with modem bits.
 		Always one byte as we never send inline break data */
-			*dp++ = gsm_encode_modem(dlci);
+			*dp++ = (gsm_encode_modem(dlci) << 1) | EA;
 			break;
 		}
 		WARN_ON(kfifo_out_locked(dlci->fifo, dp , len, &dlci->lock) != len);

From: Daniel Starke <[email protected]>

commit a24b4b2f660b7ddf3f484b37600bba382cb28a9d upstream.

The gsm_mux field 'malformed' represents the number of malformed frames received. However, gsm1_receive() also increases this counter for any out of frame byte.
Fix this by ignoring out of frame data for the malformed counter.

---
 drivers/tty/n_gsm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -1977,7 +1977,8 @@ static void gsm1_receive(struct gsm_mux
 		}
 		/* Any partial frame was a runt so go back to start */
 		if (gsm->state != GSM_START) {
-			gsm->malformed++;
+			if (gsm->state != GSM_SEARCH)
+				gsm->malformed++;
 			gsm->state = GSM_START;
 		}
 		/* A SOF in GSM_START means we are still reading idling or

From: Daniel Starke <[email protected]>

commit 535bf600de75a859698892ee873521a48d289ec1 upstream.

n_gsm is based on the 3GPP 07.010 and its newer version is the 3GPP 27.010.
See https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516
The changes from 07.010 to 27.010 are non-functional. Therefore, I refer to
the newer 27.010 here. Chapter 5.7.2 states that the maximum frame size
(N1) refers to the length of the information field (i.e. user payload).
However, 'txframe' stores the whole frame including frame header, checksum
and start/end flags. We also need to consider the byte stuffing overhead.
Define constant for the protocol overhead and adjust the 'txframe' size
calculation accordingly to reserve enough space for a complete mux frame
including byte stuffing for advanced option mode. Note that no byte
stuffing is applied to the start and end flag.
Also use MAX_MTU instead of MAX_MRU as this buffer is used for data
transmission.

---
 drivers/tty/n_gsm.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -84,6 +84,8 @@ module_param(debug, int, 0600);
  */
 #define MAX_MRU 1500
 #define MAX_MTU 1500
+/* SOF, ADDR, CTRL, LEN1, LEN2, ..., FCS, EOF */
+#define PROT_OVERHEAD 7
 #define	GSM_NET_TX_TIMEOUT (HZ*10)
 
 /**

@@ -2199,7 +2201,7 @@ static struct gsm_mux *gsm_alloc_mux(voi
 		kfree(gsm);
 		return NULL;
 	}
-	gsm->txframe = kmalloc(2 * MAX_MRU + 2, GFP_KERNEL);
+	gsm->txframe = kmalloc(2 * (MAX_MTU + PROT_OVERHEAD - 1), GFP_KERNEL);
 	if (gsm->txframe == NULL) {
 		kfree(gsm->buf);
 		kfree(gsm);

From: Daniel Starke <[email protected]>

commit 17eac652028501df7ea296b1d9b9c134db262b7d upstream.

In gsm_cleanup_mux() the muxer is closed down and all queues are removed. However, removing the queues is done without explicit control of the underlying buffers. Flush those before freeing up our queues to ensure that all outgoing queues are cleared consistently. Otherwise, a new mux connection establishment attempt may time out while the underlying tty is still busy sending out the remaining data from the previous connection.

---
 drivers/tty/n_gsm.c |    1 +
 1 file changed, 1 insertion(+)

@@ -2101,6 +2101,7 @@ static void gsm_cleanup_mux(struct gsm_m
 			gsm_dlci_release(gsm->dlci[i]);
 	mutex_unlock(&gsm->mutex);
 	/* Now wipe the queues */
+	tty_ldisc_flush(gsm->tty);
 	list_for_each_entry_safe(txq, ntxq, &gsm->tx_list, list)
 		kfree(txq);
 	INIT_LIST_HEAD(&gsm->tx_list);

From: Daniel Starke <[email protected]>

commit d0bcdffcad5a22f202e3bf37190c0dd8c080ea92 upstream.

n_gsm is based on the 3GPP 07.010 and its newer version is the 3GPP 27.010.
See https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516
The changes from 07.010 to 27.010 are non-functional. Therefore, I refer to
the newer 27.010 here. Chapter 5.7.3 states that the valid range for the
maximum number of retransmissions (N2) is from 0 to 255 (both including).
gsm_config() fails to limit this range correctly. Furthermore,
gsm_control_retransmit() handles this number incorrectly by performing
N2 - 1 retransmission attempts. Setting N2 to zero results in more than 255 retransmission attempts.
Fix the range check in gsm_config() and the value handling in
gsm_control_send() and gsm_control_retransmit() to comply with 3GPP 27.010.

---
 drivers/tty/n_gsm.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

@@ -1345,7 +1345,6 @@ static void gsm_control_retransmit(unsig
 	spin_lock_irqsave(&gsm->control_lock, flags);
 	ctrl = gsm->pending_cmd;
 	if (ctrl) {
-		gsm->cretries--;
 		if (gsm->cretries == 0) {
 			gsm->pending_cmd = NULL;
 			ctrl->error = -ETIMEDOUT;

@@ -1354,6 +1353,7 @@ static void gsm_control_retransmit(unsig
 			wake_up(&gsm->event);
 			return;
 		}
+		gsm->cretries--;
 		gsm_control_transmit(gsm, ctrl);
 		mod_timer(&gsm->t2_timer, jiffies + gsm->t2 * HZ / 100);
 	}

@@ -1394,7 +1394,7 @@ retry:
 
 	/* If DLCI0 is in ADM mode skip retries, it won't respond */
 	if (gsm->dlci[0]->mode == DLCI_MODE_ADM)
-		gsm->cretries = 1;
+		gsm->cretries = 0;
 	else
 		gsm->cretries = gsm->n2;
 

@@ -2519,7 +2519,7 @@ static int gsmld_config(struct tty_struc
 	/* Check the MRU/MTU range looks sane */
 	if (c->mru > MAX_MRU || c->mtu > MAX_MTU || c->mru < 8 || c->mtu < 8)
 		return -EINVAL;
-	if (c->n2 < 3)
+	if (c->n2 > 255)
 		return -EINVAL;
 	if (c->encapsulation > 1)	/* Basic, advanced, no I */
 		return -EINVAL;

From: Daniel Starke <[email protected]>

commit 398867f59f956985f4c324f173eff7b946e14bd8 upstream.

n_gsm is based on the 3GPP 07.010 and its newer version is the 3GPP 27.010.
See https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516
The changes from 07.010 to 27.010 are non-functional. Therefore, I refer to
the newer 27.010 here. Chapter 5.4.6.1 states that each command frame shall
be made up from type, length and value. Looking for example in chapter
5.4.6.3.5 at the description for the encoding of a flow control on command
it becomes obvious, that the type and length field is always present
whereas the value may be zero bytes long. The current implementation omits
the length field if the value is not present. This is wrong.
Correct this by always sending the length in gsm_control_transmit().
So far only the modem status command (MSC) has included a value and encoded
its length directly. Therefore, also change gsmtty_modem_update().

---
 drivers/tty/n_gsm.c |   23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

@@ -1318,11 +1318,12 @@ static void gsm_control_response(struct
 
 static void gsm_control_transmit(struct gsm_mux *gsm, struct gsm_control *ctrl)
 {
-	struct gsm_msg *msg = gsm_data_alloc(gsm, 0, ctrl->len + 1, gsm->ftype);
+	struct gsm_msg *msg = gsm_data_alloc(gsm, 0, ctrl->len + 2, gsm->ftype);
 	if (msg == NULL)
 		return;
-	msg->data[0] = (ctrl->cmd << 1) | 2 | EA;	/* command */
-	memcpy(msg->data + 1, ctrl->data, ctrl->len);
+	msg->data[0] = (ctrl->cmd << 1) | CR | EA;	/* command */
+	msg->data[1] = (ctrl->len << 1) | EA;
+	memcpy(msg->data + 2, ctrl->data, ctrl->len);
 	gsm_data_queue(gsm->dlci[0], msg);
 }
 

@@ -2864,19 +2865,17 @@ static struct tty_ldisc_ops tty_ldisc_pa
 
 static int gsmtty_modem_update(struct gsm_dlci *dlci, u8 brk)
 {
-	u8 modembits[5];
+	u8 modembits[3];
 	struct gsm_control *ctrl;
 	int len = 2;
 
-	if (brk)
+	modembits[0] = (dlci->addr << 2) | 2 | EA;  /* DLCI, Valid, EA */
+	modembits[1] = (gsm_encode_modem(dlci) << 1) | EA;
+	if (brk) {
+		modembits[2] = (brk << 4) | 2 | EA; /* Length, Break, EA */
 		len++;
-
-	modembits[0] = len << 1 | EA;		/* Data bytes */
-	modembits[1] = dlci->addr << 2 | 3;	/* DLCI, EA, 1 */
-	modembits[2] = gsm_encode_modem(dlci) << 1 | EA;
-	if (brk)
-		modembits[3] = brk << 4 | 2 | EA;	/* Valid, EA */
-	ctrl = gsm_control_send(dlci->gsm, CMD_MSC, modembits, len + 1);
+	}
+	ctrl = gsm_control_send(dlci->gsm, CMD_MSC, modembits, len);
 	if (ctrl == NULL)
 		return -ENOMEM;
 	return gsm_control_wait(dlci->gsm, ctrl);

From: Daniel Starke <[email protected]>

commit ff9166c623704337bd6fe66fce2838d9768a6634 upstream.

n_gsm is based on the 3GPP 07.010 and its newer version is the 3GPP 27.010.
See https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516
The changes from 07.010 to 27.010 are non-functional. Therefore, I refer to
the newer 27.010 here. Chapter 5.4.4.2 states that any received unnumbered acknowledgment (UA) with its poll/final (PF) bit set to 0 shall be
discarded. Currently, all UA frame are handled in the same way regardless
of the PF bit. This does not comply with the standard.
Remove the UA case in gsm_queue() to process only UA frames with PF bit set
to 1 to abide the standard.

---
 drivers/tty/n_gsm.c |    1 -
 1 file changed, 1 deletion(-)

@@ -1829,7 +1829,6 @@ static void gsm_queue(struct gsm_mux *gs
 		gsm_response(gsm, address, UA);
 		gsm_dlci_close(dlci);
 		break;
-	case UA:
 	case UA|PF:
 		if (cr == 0 || dlci == NULL)
 			break;

From: Maciej W. Rozycki <[email protected]>

commit f0a6c68f69981214cb7858738dd2bc81475111f7 upstream.

Fix the discrepancy between the two places we check for the CP0 counter erratum in along with the incorrect comparison of the R4400 revision number against 0x30 which matches none and consistently consider all R4000 and R4400 processors affected, as documented in processor errata publications[1][2][3], following the mapping between CP0 PRId register values and processor models:

PRId | Processor Model
---------+--------------------

00000422 | R4000 Revision 2.2
00000430 | R4000 Revision 3.0
00000440 | R4400 Revision 1.0
00000450 | R4400 Revision 2.0
00000460 | R4400 Revision 3.0

No other revision of either processor has ever been spotted.

Contrary to what has been stated in commit ce202cbb9e0b ("[MIPS] Assume R4000/R4400 newer than 3.0 don't have the mfc0 count bug") marking the CP0 counter as buggy does not preclude it from being used as either a clock event or a clock source device. It just cannot be used as both at a time, because in that case clock event interrupts will be occasionally lost, and the use as a clock event device takes precedence.

Compare against 0x4ff in `can_use_mips_counter' so that a single machine instruction is produced.

[1] "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", MIPS

    Technologies Inc., May 10, 1994, Erratum 53, p.13

[2] "MIPS R4400PC/SC Errata, Processor Revision 1.0", MIPS Technologies

    Inc., February 9, 1994, Erratum 21, p.4

[3] "MIPS R4400PC/SC Errata, Processor Revision 2.0 & 3.0", MIPS

    Technologies Inc., January 24, 1995, Erratum 14, p.3

---
 arch/mips/include/asm/timex.h |    8 ++++----
 arch/mips/kernel/time.c       |   11 +++--------
 2 files changed, 7 insertions(+), 12 deletions(-)

@@ -40,9 +40,9 @@
 typedef unsigned int cycles_t;
 
 /*
- * On R4000/R4400 before version 5.0 an erratum exists such that if the
- * cycle counter is read in the exact moment that it is matching the
- * compare register, no interrupt will be generated.
+ * On R4000/R4400 an erratum exists such that if the cycle counter is
+ * read in the exact moment that it is matching the compare register,
+ * no interrupt will be generated.
  *
  * There is a suggested workaround and also the erratum can't strike if
  * the compare interrupt isn't being used as the clock source device.

@@ -63,7 +63,7 @@ static inline int can_use_mips_counter(u
 	if (!__builtin_constant_p(cpu_has_counter))
 		asm volatile("" : "=m" (cpu_data[0].options));
 	if (likely(cpu_has_counter &&
-		   prid >= (PRID_IMP_R4000 | PRID_REV_ENCODE_44(5, 0))))
+		   prid > (PRID_IMP_R4000 | PRID_REV_ENCODE_44(15, 15))))
 		return 1;
 	else
 		return 0;

@@ -168,15 +168,10 @@ static __init int cpu_has_mfc0_count_bug
 	case CPU_R4400MC:
 		/*
 		 * The published errata for the R4400 up to 3.0 say the CPU
-		 * has the mfc0 from count bug.
+		 * has the mfc0 from count bug.  This seems the last version
+		 * produced.
 		 */
-		if ((current_cpu_data.processor_id & 0xff) <= 0x30)
-			return 1;
-
-		/*
-		 * we assume newer revisions are ok
-		 */
-		return 0;
+		return 1;
 	}
 
 	return 0;

From: Helge Deller <[email protected]>

commit 5b89966bc96a06f6ad65f64ae4b0461918fcc9d3 upstream.

The Linux tool "lscpu" shows the double amount of CPUs if we have "model" and "model name" in two different lines in /proc/cpuinfo. This change combines the model and the model name into one line.

---
 arch/parisc/kernel/processor.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

@@ -390,8 +390,7 @@ show_cpuinfo (struct seq_file *m, void *
 		}
 		seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities);
 
-		seq_printf(m, "model\t\t: %s\n"
-				"model name\t: %s\n",
+		seq_printf(m, "model\t\t: %s - %s\n",
 				 boot_cpu_data.pdc.sys_model_name,
 				 cpuinfo->dev ?
 				 cpuinfo->dev->name : "Unknown");

From: Takashi Sakamoto <[email protected]>

commit eb9d84b0ffe39893cb23b0b6712bbe3637fa25fa upstream.

ALSA fireworks driver has a bug in its initial state to return count shorter than expected by 4 bytes to userspace applications when handling response frame for Echo Audio Fireworks transaction. It's due to missing addition of the size for the type of event in ALSA firewire stack.

---
 sound/firewire/fireworks/fireworks_hwdep.c |    1 +
 1 file changed, 1 insertion(+)

@@ -35,6 +35,7 @@ hwdep_read_resp_buf(struct snd_efw *efw,
 	type = SNDRV_FIREWIRE_EVENT_EFW_RESPONSE;
 	if (copy_to_user(buf, &type, sizeof(type)))
 		return -EFAULT;
+	count += sizeof(type);
 	remained -= sizeof(type);
 	buf += sizeof(type);
 

From: Trond Myklebust <[email protected]>

commit a3d0562d4dc039bca39445e1cddde7951662e17d upstream.

This reverts commit 7073ea8799a8cf73db60270986f14e4aae20fa80.

We must not try to connect the socket while the transport is under construction, because the mechanisms to safely tear it down are not in place. As the code stands, we end up leaking the sockets on a connection error.

---
 net/sunrpc/xprtsock.c |    3 ---
 1 file changed, 3 deletions(-)

@@ -2882,9 +2882,6 @@ static struct rpc_xprt *xs_setup_local(s
 		}
 		xprt_set_bound(xprt);
 		xs_format_peer_addresses(xprt, "local", RPCBIND_NETID_LOCAL);
-		ret = ERR_PTR(xs_local_setup_socket(transport));
-		if (ret)
-			goto out_err;
 		break;
 	default:
 		ret = ERR_PTR(-EAFNOSUPPORT);

From: Chengfeng Ye <[email protected]>

commit b7c81f80246fac44077166f3e07103affe6db8ff upstream.

&e->event and e point to the same address, and &e->event could be freed in queue_event. So there is a potential uaf issue if we dereference e after calling queue_event(). Fix this by adding a temporary variable to maintain e->client in advance, this can avoid the potential uaf issue.

---
 drivers/firewire/core-cdev.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -1496,6 +1496,7 @@ static void outbound_phy_packet_callback
 {
 	struct outbound_phy_packet_event *e =
 		container_of(packet, struct outbound_phy_packet_event, p);
+	struct client *e_client;
 
 	switch (status) {
 	/* expected: */

@@ -1512,9 +1513,10 @@ static void outbound_phy_packet_callback
 	}
 	e->phy_packet.data[0] = packet->timestamp;
 
+	e_client = e->client;
 	queue_event(e->client, &e->event, &e->phy_packet,
 		    sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0);
-	client_put(e->client);
+	client_put(e_client);
 }
 
 static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)

From: Jakob Koschel <[email protected]>

commit 9423973869bd4632ffe669f950510c49296656e0 upstream.

When list_for_each_entry() completes the iteration over the whole list without breaking the loop, the iterator value will be a bogus pointer computed based on the head element.

While it is safe to use the pointer to determine if it was computed based on the head element, either with list_entry_is_head() or &pos->member == head, using the iterator variable after the loop should be avoided.

In preparation to limit the scope of a list iterator to the list traversal loop, use a dedicated pointer to point to the found element [1].

---
 drivers/firewire/core-transaction.c |   30 ++++++++++++++++--------------
 drivers/firewire/sbp2.c             |   13 +++++++------
 2 files changed, 23 insertions(+), 20 deletions(-)

@@ -86,24 +86,25 @@ static int try_cancel_split_timeout(stru
 static int close_transaction(struct fw_transaction *transaction,
 			     struct fw_card *card, int rcode)
 {
-	struct fw_transaction *t;
+	struct fw_transaction *t = NULL, *iter;
 	unsigned long flags;
 
 	spin_lock_irqsave(&card->lock, flags);
-	list_for_each_entry(t, &card->transaction_list, link) {
-		if (t == transaction) {
-			if (!try_cancel_split_timeout(t)) {
+	list_for_each_entry(iter, &card->transaction_list, link) {
+		if (iter == transaction) {
+			if (!try_cancel_split_timeout(iter)) {
 				spin_unlock_irqrestore(&card->lock, flags);
 				goto timed_out;
 			}
-			list_del_init(&t->link);
-			card->tlabel_mask &= ~(1ULL << t->tlabel);
+			list_del_init(&iter->link);
+			card->tlabel_mask &= ~(1ULL << iter->tlabel);
+			t = iter;
 			break;
 		}
 	}
 	spin_unlock_irqrestore(&card->lock, flags);
 
-	if (&t->link != &card->transaction_list) {
+	if (t) {
 		t->callback(card, rcode, NULL, 0, t->callback_data);
 		return 0;
 	}

@@ -938,7 +939,7 @@ EXPORT_SYMBOL(fw_core_handle_request);
 
 void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
 {
-	struct fw_transaction *t;
+	struct fw_transaction *t = NULL, *iter;
 	unsigned long flags;
 	u32 *data;
 	size_t data_length;

@@ -950,20 +951,21 @@ void fw_core_handle_response(struct fw_c
 	rcode	= HEADER_GET_RCODE(p->header[1]);
 
 	spin_lock_irqsave(&card->lock, flags);
-	list_for_each_entry(t, &card->transaction_list, link) {
-		if (t->node_id == source && t->tlabel == tlabel) {
-			if (!try_cancel_split_timeout(t)) {
+	list_for_each_entry(iter, &card->transaction_list, link) {
+		if (iter->node_id == source && iter->tlabel == tlabel) {
+			if (!try_cancel_split_timeout(iter)) {
 				spin_unlock_irqrestore(&card->lock, flags);
 				goto timed_out;
 			}
-			list_del_init(&t->link);
-			card->tlabel_mask &= ~(1ULL << t->tlabel);
+			list_del_init(&iter->link);
+			card->tlabel_mask &= ~(1ULL << iter->tlabel);
+			t = iter;
 			break;
 		}
 	}
 	spin_unlock_irqrestore(&card->lock, flags);
 
-	if (&t->link == &card->transaction_list) {
+	if (!t) {
  timed_out:
 		fw_notice(card, "unsolicited response (source %x, tlabel %x)\n",
 			  source, tlabel);

@@ -421,7 +421,7 @@ static void sbp2_status_write(struct fw_
 			      void *payload, size_t length, void *callback_data)
 {
 	struct sbp2_logical_unit *lu = callback_data;
-	struct sbp2_orb *orb;
+	struct sbp2_orb *orb = NULL, *iter;
 	struct sbp2_status status;
 	unsigned long flags;
 

@@ -446,17 +446,18 @@ static void sbp2_status_write(struct fw_
 
 	/* Lookup the orb corresponding to this status write. */
 	spin_lock_irqsave(&lu->tgt->lock, flags);
-	list_for_each_entry(orb, &lu->orb_list, link) {
+	list_for_each_entry(iter, &lu->orb_list, link) {
 		if (STATUS_GET_ORB_HIGH(status) == 0 &&
-		    STATUS_GET_ORB_LOW(status) == orb->request_bus) {
-			orb->rcode = RCODE_COMPLETE;
-			list_del(&orb->link);
+		    STATUS_GET_ORB_LOW(status) == iter->request_bus) {
+			iter->rcode = RCODE_COMPLETE;
+			list_del(&iter->link);
+			orb = iter;
 			break;
 		}
 	}
 	spin_unlock_irqrestore(&lu->tgt->lock, flags);
 
-	if (&orb->link != &lu->orb_list) {
+	if (orb) {
 		orb->callback(orb, &status);
 		kref_put(&orb->kref, free_orb); /* orb callback reference */
 	} else {

From: Niels Dossche <[email protected]>

commit a7ecbe92b9243edbe94772f6f2c854e4142a3345 upstream.

card->local_node and card->bm_retries are both always accessed under card->lock.
fw_core_handle_bus_reset has a check whose condition depends on card->local_node and whose body writes to card->bm_retries. Both of these accesses are not under card->lock. Move the lock acquiring of card->lock to before this check such that these accesses do happen when card->lock is held.
fw_destroy_nodes is called inside the check.
Since fw_destroy_nodes already acquires card->lock inside its function body, move this out to the callsites of fw_destroy_nodes. Also add a comment to indicate which locking is necessary when calling fw_destroy_nodes.

---
 drivers/firewire/core-card.c     |    3 +++
 drivers/firewire/core-topology.c |    9 +++------
 2 files changed, 6 insertions(+), 6 deletions(-)

@@ -681,6 +681,7 @@ EXPORT_SYMBOL_GPL(fw_card_release);
 void fw_core_remove_card(struct fw_card *card)
 {
 	struct fw_card_driver dummy_driver = dummy_driver_template;
+	unsigned long flags;
 
 	card->driver->update_phy_reg(card, 4,
 				     PHY_LINK_ACTIVE | PHY_CONTENDER, 0);

@@ -695,7 +696,9 @@ void fw_core_remove_card(struct fw_card
 	dummy_driver.stop_iso		= card->driver->stop_iso;
 	card->driver = &dummy_driver;
 
+	spin_lock_irqsave(&card->lock, flags);
 	fw_destroy_nodes(card);
+	spin_unlock_irqrestore(&card->lock, flags);
 
 	/* Wait for all users, especially device workqueue jobs, to finish. */
 	fw_card_put(card);

@@ -387,16 +387,13 @@ static void report_found_node(struct fw_
 	card->bm_retries = 0;
 }
 
+/* Must be called with card->lock held */
 void fw_destroy_nodes(struct fw_card *card)
 {
-	unsigned long flags;
-
-	spin_lock_irqsave(&card->lock, flags);
 	card->color++;
 	if (card->local_node != NULL)
 		for_each_fw_node(card, card->local_node, report_lost_node);
 	card->local_node = NULL;
-	spin_unlock_irqrestore(&card->lock, flags);
 }
 
 static void move_tree(struct fw_node *node0, struct fw_node *node1, int port)

@@ -522,6 +519,8 @@ void fw_core_handle_bus_reset(struct fw_
 	struct fw_node *local_node;
 	unsigned long flags;
 
+	spin_lock_irqsave(&card->lock, flags);
+
 	/*
 	 * If the selfID buffer is not the immediate successor of the
 	 * previously processed one, we cannot reliably compare the

@@ -533,8 +532,6 @@ void fw_core_handle_bus_reset(struct fw_
 		card->bm_retries = 0;
 	}
 
-	spin_lock_irqsave(&card->lock, flags);
-
 	card->broadcast_channel_allocated = card->broadcast_channel_auto_allocated;
 	card->node_id = node_id;
 	/*

From: Mark Brown <[email protected]>

commit b4f5c6b2e52b27462c0599e64e96e53b58438de1 upstream.

The WM8958 DSP controls all return 0 on successful write, not a boolean value indicating if the write changed the value of the control. Fix this by returning 1 after a change, there is already a check at the start of each put() that skips the function in the case that there is no change.

---
 sound/soc/codecs/wm8958-dsp2.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

@@ -533,7 +533,7 @@ static int wm8958_mbc_put(struct snd_kco
 
 	wm8958_dsp_apply(codec, mbc, wm8994->mbc_ena[mbc]);
 
-	return 0;
+	return 1;
 }
 
 #define WM8958_MBC_SWITCH(xname, xval) {\

@@ -659,7 +659,7 @@ static int wm8958_vss_put(struct snd_kco
 
 	wm8958_dsp_apply(codec, vss, wm8994->vss_ena[vss]);
 
-	return 0;
+	return 1;
 }
 
 

@@ -733,7 +733,7 @@ static int wm8958_hpf_put(struct snd_kco
 
 	wm8958_dsp_apply(codec, hpf % 3, ucontrol->value.integer.value[0]);
 
-	return 0;
+	return 1;
 }
 
 #define WM8958_HPF_SWITCH(xname, xval) {\

@@ -827,7 +827,7 @@ static int wm8958_enh_eq_put(struct snd_
 
 	wm8958_dsp_apply(codec, eq, ucontrol->value.integer.value[0]);
 
-	return 0;
+	return 1;
 }
 
 #define WM8958_ENH_EQ_SWITCH(xname, xval) {\

From: Duoming Zhou <[email protected]>

commit 47f070a63e735bcc8d481de31be1b5a1aa62b31c upstream.

There are deadlocks caused by del_timer_sync(&priv->hang_timer) and del_timer_sync(&priv->rr_timer) in grcan_close(), one of the deadlocks are shown below:

   (Thread 1)              |      (Thread 2)
                           | grcan_reset_timer()
grcan_close()              |  mod_timer()
 spin_lock_irqsave() //(1) |  (wait a time)
 ...                       | grcan_initiate_running_reset()
 del_timer_sync()          |  spin_lock_irqsave() //(2)
 (wait timer to stop)      |  ...

We hold priv->lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need priv->lock in position (2) of thread 2. As a result, grcan_close() will block forever.

This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.

---
 drivers/net/can/grcan.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -1117,8 +1117,10 @@ static int grcan_close(struct net_device
 
 	priv->closing = true;
 	if (priv->need_txbug_workaround) {
+		spin_unlock_irqrestore(&priv->lock, flags);
 		del_timer_sync(&priv->hang_timer);
 		del_timer_sync(&priv->rr_timer);
+		spin_lock_irqsave(&priv->lock, flags);
 	}
 	netif_stop_queue(dev);
 	grcan_stop_hardware(dev);

From: Daniel Hellstrom <[email protected]>

commit 101da4268626b00d16356a6bf284d66e44c46ff9 upstream.

Use the device of the device tree node should be rather than the device of the struct net_device when allocating DMA buffers.

The driver got away with it on sparc32 until commit 53b7670e5735 ("sparc: factor the dma coherent mapping into helper") after which the driver oopses.

---
 drivers/net/can/grcan.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

@@ -252,6 +252,7 @@ struct grcan_device_config {
 struct grcan_priv {
 	struct can_priv can;	/* must be the first member */
 	struct net_device *dev;
+	struct device *ofdev_dev;
 	struct napi_struct napi;
 
 	struct grcan_registers __iomem *regs;	/* ioremap'ed registers */

@@ -928,7 +929,7 @@ static void grcan_free_dma_buffers(struc
 	struct grcan_priv *priv = netdev_priv(dev);
 	struct grcan_dma *dma = &priv->dma;
 
-	dma_free_coherent(&dev->dev, dma->base_size, dma->base_buf,
+	dma_free_coherent(priv->ofdev_dev, dma->base_size, dma->base_buf,
 			  dma->base_handle);
 	memset(dma, 0, sizeof(*dma));
 }

@@ -953,7 +954,7 @@ static int grcan_allocate_dma_buffers(st
 
 	/* Extra GRCAN_BUFFER_ALIGNMENT to allow for alignment */
 	dma->base_size = lsize + ssize + GRCAN_BUFFER_ALIGNMENT;
-	dma->base_buf = dma_alloc_coherent(&dev->dev,
+	dma->base_buf = dma_alloc_coherent(priv->ofdev_dev,
 					   dma->base_size,
 					   &dma->base_handle,
 					   GFP_KERNEL);

@@ -1606,6 +1607,7 @@ static int grcan_setup_netdev(struct pla
 	memcpy(&priv->config, &grcan_module_config,
 	       sizeof(struct grcan_device_config));
 	priv->dev = dev;
+	priv->ofdev_dev = &ofdev->dev;
 	priv->regs = base;
 	priv->can.bittiming_const = &grcan_bittiming_const;
 	priv->can.do_set_bittiming = grcan_set_bittiming;

From: Duoming Zhou <[email protected]>

commit da5c0f119203ad9728920456a0f52a6d850c01cd upstream.

The device_is_registered() in nfc core is used to check whether nfc device is registered in netlink related functions such as nfc_fw_download(), nfc_dev_up() and so on. Although device_is_registered() is protected by device_lock, there is still a race condition between device_del() and device_is_registered(). The root cause is that kobject_del() in device_del() is not protected by device_lock.

   (cleanup task)         |     (netlink task)
                          |
nfc_unregister_device     | nfc_fw_download
 device_del               |  device_lock
  ...                     |   if (!device_is_registered)//(1)
  kobject_del//(2)        |   ...
 ...                      |  device_unlock

The device_is_registered() returns the value of state_in_sysfs and the state_in_sysfs is set to zero in kobject_del(). If we pass check in position (1), then set zero in position (2). As a result, the check in position (1) is useless.

This patch uses bool variable instead of device_is_registered() to judge whether the nfc device is registered, which is well synchronized.

---
 net/nfc/core.c |   29 ++++++++++++++---------------
 1 file changed, 14 insertions(+), 15 deletions(-)

@@ -50,7 +50,7 @@ int nfc_fw_download(struct nfc_dev *dev,
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -106,7 +106,7 @@ int nfc_dev_up(struct nfc_dev *dev)
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -154,7 +154,7 @@ int nfc_dev_down(struct nfc_dev *dev)
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -218,7 +218,7 @@ int nfc_start_poll(struct nfc_dev *dev,
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -257,7 +257,7 @@ int nfc_stop_poll(struct nfc_dev *dev)
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -302,7 +302,7 @@ int nfc_dep_link_up(struct nfc_dev *dev,
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -346,7 +346,7 @@ int nfc_dep_link_down(struct nfc_dev *de
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -412,7 +412,7 @@ int nfc_activate_target(struct nfc_dev *
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -458,7 +458,7 @@ int nfc_deactivate_target(struct nfc_dev
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -505,7 +505,7 @@ int nfc_data_exchange(struct nfc_dev *de
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		kfree_skb(skb);
 		goto error;

@@ -562,7 +562,7 @@ int nfc_enable_se(struct nfc_dev *dev, u
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -611,7 +611,7 @@ int nfc_disable_se(struct nfc_dev *dev,
 
 	device_lock(&dev->dev);
 
-	if (!device_is_registered(&dev->dev)) {
+	if (dev->shutting_down) {
 		rc = -ENODEV;
 		goto error;
 	}

@@ -1142,6 +1142,7 @@ int nfc_register_device(struct nfc_dev *
 			dev->rfkill = NULL;
 		}
 	}
+	dev->shutting_down = false;
 	device_unlock(&dev->dev);
 
 	rc = nfc_genl_device_added(dev);

@@ -1174,12 +1175,10 @@ void nfc_unregister_device(struct nfc_de
 		rfkill_unregister(dev->rfkill);
 		rfkill_destroy(dev->rfkill);
 	}
+	dev->shutting_down = true;
 	device_unlock(&dev->dev);
 
 	if (dev->ops->check_presence) {
-		device_lock(&dev->dev);
-		dev->shutting_down = true;
-		device_unlock(&dev->dev);
 		del_timer_sync(&dev->check_pres_timer);
 		cancel_work_sync(&dev->check_pres_work);
 	}

From: Duoming Zhou <[email protected]>

commit d270453a0d9ec10bb8a802a142fb1b3601a83098 upstream.

There are destructive operations such as nfcmrvl_fw_dnld_abort and gpio_free in nfcmrvl_nci_unregister_dev. The resources such as firmware, gpio and so on could be destructed while the upper layer functions such as nfcmrvl_fw_dnld_start and nfcmrvl_nci_recv_frame is executing, which leads to double-free, use-after-free and null-ptr-deref bugs.

There are three situations that could lead to double-free bugs.

The first situation is shown below:

   (Thread 1)                 |      (Thread 2)
nfcmrvl_fw_dnld_start         |
 ...                          |  nfcmrvl_nci_unregister_dev
 release_firmware()           |   nfcmrvl_fw_dnld_abort
  kfree(fw) //(1)             |    fw_dnld_over
                              |     release_firmware
  ...                         |      kfree(fw) //(2)
                              |     ...

The second situation is shown below:

   (Thread 1)                 |      (Thread 2)
nfcmrvl_fw_dnld_start         |
 ...                          |
 mod_timer                    |
 (wait a time)                |
 fw_dnld_timeout              |  nfcmrvl_nci_unregister_dev
   fw_dnld_over               |   nfcmrvl_fw_dnld_abort
    release_firmware          |    fw_dnld_over
     kfree(fw) //(1)          |     release_firmware
     ...                      |      kfree(fw) //(2)

The third situation is shown below:

       (Thread 1)               |       (Thread 2)
nfcmrvl_nci_recv_frame          |
 if(..->fw_download_in_progress)|
  nfcmrvl_fw_dnld_recv_frame    |
   queue_work                   |
                                |
fw_dnld_rx_work                 | nfcmrvl_nci_unregister_dev
 fw_dnld_over                   |  nfcmrvl_fw_dnld_abort
  release_firmware              |   fw_dnld_over
   kfree(fw) //(1)              |    release_firmware
                                |     kfree(fw) //(2)

The firmware struct is deallocated in position (1) and deallocated in position (2) again.

The crash trace triggered by POC is like below:

BUG: KASAN: double-free or invalid-free in fw_dnld_over
Call Trace:
  kfree
  fw_dnld_over
  nfcmrvl_nci_unregister_dev
  nci_uart_tty_close
  tty_ldisc_kill
  tty_ldisc_hangup
  __tty_hangup.part.0
  tty_release
  ...

What's more, there are also use-after-free and null-ptr-deref bugs in nfcmrvl_fw_dnld_start. If we deallocate firmware struct, gpio or set null to the members of priv->fw_dnld in nfcmrvl_nci_unregister_dev, then, we dereference firmware, gpio or the members of priv->fw_dnld in nfcmrvl_fw_dnld_start, the UAF or NPD bugs will happen.

This patch reorders destructive operations after nci_unregister_device in order to synchronize between cleanup routine and firmware download routine.

The nci_unregister_device is well synchronized. If the device is detaching, the firmware download routine will goto error. If firmware download routine is executing, nci_unregister_device will wait until firmware download routine is finished.

---
 drivers/nfc/nfcmrvl/main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -194,6 +194,7 @@ void nfcmrvl_nci_unregister_dev(struct n
 {
 	struct nci_dev *ndev = priv->ndev;
 
+	nci_unregister_device(ndev);
 	if (priv->ndev->nfc_dev->fw_download_in_progress)
 		nfcmrvl_fw_dnld_abort(priv);
 

@@ -202,7 +203,6 @@ void nfcmrvl_nci_unregister_dev(struct n
 	if (priv->config.reset_n_io)
 		gpio_free(priv->config.reset_n_io);
 
-	nci_unregister_device(ndev);
 	nci_free_device(ndev);
 	kfree(priv);
 }

From: Duoming Zhou <[email protected]>

commit 4071bf121d59944d5cd2238de0642f3d7995a997 upstream.

There are sleep in atomic bug that could cause kernel panic during firmware download process. The root cause is that nlmsg_new with GFP_KERNEL parameter is called in fw_dnld_timeout which is a timer handler. The call trace is shown below:

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:265
Call Trace:

kmem_cache_alloc_node
__alloc_skb
nfc_genl_fw_download_done
call_timer_fn
__run_timers.part.0
run_timer_softirq
__do_softirq
...

The nlmsg_new with GFP_KERNEL parameter may sleep during memory allocation process, and the timer handler is run as the result of a "software interrupt" that should not call any other function that could sleep.

This patch changes allocation mode of netlink message from GFP_KERNEL to GFP_ATOMIC in order to prevent sleep in atomic bug. The GFP_ATOMIC flag makes memory allocation operation could be used in atomic context.

---
 net/nfc/netlink.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -1254,7 +1254,7 @@ int nfc_genl_fw_download_done(struct nfc
 	struct sk_buff *msg;
 	void *hdr;
 
-	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 	if (!msg)
 		return -ENOMEM;
 

@@ -1270,7 +1270,7 @@ int nfc_genl_fw_download_done(struct nfc
 
 	genlmsg_end(msg, hdr);
 
-	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
+	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
 
 	return 0;
 

From: Armin Wolf <[email protected]>

commit 7b2666ce445c700b8dcee994da44ddcf050a0842 upstream.

When removing the adt7470 module, a warning might be printed:

do not call blocking ops when !TASK_RUNNING; state=1
set at [<ffffffffa006052b>] adt7470_update_thread+0x7b/0x130 [adt7470]

This happens because adt7470_update_thread() can leave the kthread in TASK_INTERRUPTIBLE state when the kthread is being stopped before the call of set_current_state(). Since kthread_exit() might sleep in exit_signals(), the warning is printed.
Fix that by using schedule_timeout_interruptible() and removing the call of set_current_state().
This causes TASK_INTERRUPTIBLE to be set after kthread_should_stop() which might cause the kthread to exit.

---
 drivers/hwmon/adt7470.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -33,6 +33,7 @@
 #include <linux/kthread.h>
 #include <linux/slab.h>
 #include <linux/util_macros.h>
+#include <linux/sched.h>
 
 /* Addresses to scan */
 static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };

@@ -273,11 +274,10 @@ static int adt7470_update_thread(void *p
 		adt7470_read_temperatures(client, data);
 		mutex_unlock(&data->lock);
 
-		set_current_state(TASK_INTERRUPTIBLE);
 		if (kthread_should_stop())
 			break;
 
-		schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
+		schedule_timeout_interruptible(msecs_to_jiffies(data->auto_update_interval));
 	}
 
 	return 0;

From: Codrin Ciubotariu <[email protected]>

commit 660564fc9a92a893a14f255be434f7ea0b967901 upstream.

As pointed out by Sascha Hauer, this patch changes:
if (pmc->config && !pcm->config->prepare_slave_config)
<do nothing>
to:
if (pmc->config && !pcm->config->prepare_slave_config)
snd_dmaengine_pcm_prepare_slave_config()

This breaks the drivers that do not need a call to dmaengine_slave_config(). Drivers that still need to call snd_dmaengine_pcm_prepare_slave_config(), but have a NULL pcm->config->prepare_slave_config should use snd_dmaengine_pcm_prepare_slave_config() as their prepare_slave_config callback.

---
 sound/soc/soc-generic-dmaengine-pcm.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

@@ -98,10 +98,10 @@ static int dmaengine_pcm_hw_params(struc
 
 	memset(&slave_config, 0, sizeof(slave_config));
 
-	if (pcm->config && pcm->config->prepare_slave_config)
-		prepare_slave_config = pcm->config->prepare_slave_config;
-	else
+	if (!pcm->config)
 		prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
+	else
+		prepare_slave_config = pcm->config->prepare_slave_config;
 
 	if (prepare_slave_config) {
 		ret = prepare_slave_config(substream, params, &slave_config);

From: Shravya Kumbham <[email protected]>

commit 7a6bc33ab54923d325d9a1747ec9652c4361ebd1 upstream.

check the return value of of_address_to_resource() and also add missing of_node_put() for np and npp nodes.

Addresses-Coverity: Event check_return value.

---
 drivers/net/ethernet/xilinx/xilinx_emaclite.c |   15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

@@ -817,10 +817,10 @@ static int xemaclite_mdio_write(struct m
 static int xemaclite_mdio_setup(struct net_local *lp, struct device *dev)
 {
 	struct mii_bus *bus;
-	int rc;
 	struct resource res;
 	struct device_node *np = of_get_parent(lp->phy_node);
 	struct device_node *npp;
+	int rc, ret;
 
 	/* Don't register the MDIO bus if the phy_node or its parent node
 	 * can't be found.

@@ -830,8 +830,14 @@ static int xemaclite_mdio_setup(struct n
 		return -ENODEV;
 	}
 	npp = of_get_parent(np);
-
-	of_address_to_resource(npp, 0, &res);
+	ret = of_address_to_resource(npp, 0, &res);
+	of_node_put(npp);
+	if (ret) {
+		dev_err(dev, "%s resource error!\n",
+			dev->of_node->full_name);
+		of_node_put(np);
+		return ret;
+	}
 	if (lp->ndev->mem_start != res.start) {
 		struct phy_device *phydev;
 		phydev = of_phy_find_device(lp->phy_node);

@@ -840,6 +846,7 @@ static int xemaclite_mdio_setup(struct n
 				 "MDIO of the phy is not registered yet\n");
 		else
 			put_device(&phydev->mdio.dev);
+		of_node_put(np);
 		return 0;
 	}
 

@@ -852,6 +859,7 @@ static int xemaclite_mdio_setup(struct n
 	bus = mdiobus_alloc();
 	if (!bus) {
 		dev_err(dev, "Failed to allocate mdiobus\n");
+		of_node_put(np);
 		return -ENOMEM;
 	}
 

@@ -866,6 +874,7 @@ static int xemaclite_mdio_setup(struct n
 	lp->mii_bus = bus;
 
 	rc = of_mdiobus_register(bus, np);
+	of_node_put(np);
 	if (rc) {
 		dev_err(dev, "Failed to register mdio bus.\n");
 		goto err_register;

From: Sergey Shtylyov <[email protected]>

commit 5ef9b803a4af0f5e42012176889b40bb2a978b18 upstream.

The AlphaProject AP-SH4A-3A/AP-SH4AD-0A SH boards use IRQ0 for their SMSC LAN911x Ethernet chip, so the networking on them must have been broken by commit 965b2aa78fbc ("net/smsc911x: fix irq resource allocation failure") which filtered out 0 as well as the negative error codes -- it was kinda correct at the time, as platform_get_irq() could return 0 on of_irq_get() failure and on the actual 0 in an IRQ resource. This issue was fixed by me (back in 2016!), so we should be able to fix this driver to allow IRQ0 usage again...

When merging this to the stable kernels, make sure you also merge commit e330b9a6bb35 ("platform: don't return 0 from platform_get_irq[_byname]() on error") -- that's my fix to platform_get_irq() for the DT platforms...

---
 drivers/net/ethernet/smsc/smsc911x.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -2441,7 +2441,7 @@ static int smsc911x_drv_probe(struct pla
 	if (irq == -EPROBE_DEFER) {
 		retval = -EPROBE_DEFER;
 		goto out_0;
-	} else if (irq <= 0) {
+	} else if (irq < 0) {
 		pr_warn("Could not allocate irq resource\n");
 		retval = -ENODEV;
 		goto out_0;

From: Filipe Manana <[email protected]>

commit d0e64a981fd841cb0f28fcd6afcac55e6f1e6994 upstream.

On Linux, empty symlinks are invalid, and attempting to create one with the system call symlink(2) results in an -ENOENT error and this is explicitly documented in the man page.

If we rename a symlink that was created in the current transaction and its parent directory was logged before, we actually end up logging the symlink without logging its content, which is stored in an inline extent. That means that after a power failure we can end up with an empty symlink, having no content and an i_size of 0 bytes.

It can be easily reproduced like this:

  $ mkfs.btrfs -f /dev/sdc
  $ mount /dev/sdc /mnt

  $ mkdir /mnt/testdir
  $ sync

# Create a file inside the directory and fsync the directory.

  $ touch /mnt/testdir/foo
  $ xfs_io -c "fsync" /mnt/testdir

# Create a symlink inside the directory and then rename the symlink.

  $ ln -s /mnt/testdir/foo /mnt/testdir/bar
  $ mv /mnt/testdir/bar /mnt/testdir/baz

# Now fsync again the directory, this persist the log tree.

  $ xfs_io -c "fsync" /mnt/testdir

<power failure>

  $ mount /dev/sdc /mnt
  $ stat -c %s /mnt/testdir/baz
  0
  $ readlink /mnt/testdir/baz
  $

Fix this by always logging symlinks in full mode (LOG_INODE_ALL), so that their content is also logged.

A test case for fstests will follow.

---
 fs/btrfs/tree-log.c |   14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

@@ -4697,6 +4697,18 @@ static int btrfs_log_inode(struct btrfs_
 	}
 
 	/*
+	 * For symlinks, we must always log their content, which is stored in an
+	 * inline extent, otherwise we could end up with an empty symlink after
+	 * log replay, which is invalid on linux (symlink(2) returns -ENOENT if
+	 * one attempts to create an empty symlink).
+	 * We don't need to worry about flushing delalloc, because when we create
+	 * the inline extent when the symlink is created (we never have delalloc
+	 * for symlinks).
+	 */
+	if (S_ISLNK(inode->i_mode))
+		inode_only = LOG_INODE_ALL;
+
+	/*
 	 * a brute force approach to making sure we get the most uptodate
 	 * copies of everything.
 	 */

@@ -5271,7 +5283,7 @@ process_leaf:
 			}
 
 			ctx->log_new_dentries = false;
-			if (type == BTRFS_FT_DIR || type == BTRFS_FT_SYMLINK)
+			if (type == BTRFS_FT_DIR)
 				log_mode = LOG_INODE_ALL;
 			ret = btrfs_log_inode(trans, root, di_inode,
 					      log_mode, 0, LLONG_MAX, ctx);

From: Eric Dumazet <[email protected]>

commit dba5bdd57bea587ea4f0b79b03c71135f84a7e8b upstream.

syzbot reported an UAF in ip_mc_sf_allow() [1]

Whenever RCU protected list replaces an object,
the pointer to the new object needs to be updated
_before_ the call to kfree_rcu() or call_rcu()

Because kfree_rcu(ptr, rcu) got support for NULL ptr only recently in commit 12edff045bc6 ("rcu: Make kfree_rcu() ignore NULL pointers"), I chose to use the conditional to make sure stable backports won't miss this detail.

if (psl)

    kfree_rcu(psl, rcu);

net/ipv6/mcast.c has similar issues, addressed in a separate patch.

[1]

BUG: KASAN: use-after-free in ip_mc_sf_allow+0x6bb/0x6d0 net/ipv4/igmp.c:2655
Read of size 4 at addr ffff88807d37b904 by task syz-executor.5/908

CPU: 0 PID: 908 Comm: syz-executor.5 Not tainted 5.18.0-rc4-syzkaller-00064-g8f4dd16603ce #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313
 print_report mm/kasan/report.c:429 [inline]
 kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491
 ip_mc_sf_allow+0x6bb/0x6d0 net/ipv4/igmp.c:2655
 raw_v4_input net/ipv4/raw.c:190 [inline]
 raw_local_deliver+0x4d1/0xbe0 net/ipv4/raw.c:218
 ip_protocol_deliver_rcu+0xcf/0xb30 net/ipv4/ip_input.c:193
 ip_local_deliver_finish+0x2ee/0x4c0 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:461 [inline]
 ip_rcv_finish+0x1cb/0x2f0 net/ipv4/ip_input.c:437
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:556
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5405
 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5519
 netif_receive_skb_internal net/core/dev.c:5605 [inline]
 netif_receive_skb+0x13e/0x8e0 net/core/dev.c:5664
 tun_rx_batched.isra.0+0x460/0x720 drivers/net/tun.c:1534
 tun_get_user+0x28b7/0x3e30 drivers/net/tun.c:1985
 tun_chr_write_iter+0xdb/0x200 drivers/net/tun.c:2015
 call_write_iter include/linux/fs.h:2050 [inline]
 new_sync_write+0x38a/0x560 fs/read_write.c:504
 vfs_write+0x7c0/0xac0 fs/read_write.c:591
 ksys_write+0x127/0x250 fs/read_write.c:644
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3f12c3bbff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48
RSP: 002b:00007f3f13ea9130 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3f12d9bf60 RCX: 00007f3f12c3bbff
RDX: 0000000000000036 RSI: 0000000020002ac0 RDI: 00000000000000c8
RBP: 00007f3f12ce308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000036 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fffb68dd79f R14: 00007f3f13ea9300 R15: 0000000000022000
 </TASK>

Allocated by task 908:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:436 [inline]
 ____kasan_kmalloc mm/kasan/common.c:515 [inline]
 ____kasan_kmalloc mm/kasan/common.c:474 [inline]
 __kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:524
 kasan_kmalloc include/linux/kasan.h:234 [inline]
 __do_kmalloc mm/slab.c:3710 [inline]
 __kmalloc+0x209/0x4d0 mm/slab.c:3719
 kmalloc include/linux/slab.h:586 [inline]
 sock_kmalloc net/core/sock.c:2501 [inline]
 sock_kmalloc+0xb5/0x100 net/core/sock.c:2492
 ip_mc_source+0xba2/0x1100 net/ipv4/igmp.c:2392
 do_ip_setsockopt net/ipv4/ip_sockglue.c:1296 [inline]
 ip_setsockopt+0x2312/0x3ab0 net/ipv4/ip_sockglue.c:1432
 raw_setsockopt+0x274/0x2c0 net/ipv4/raw.c:861
 __sys_setsockopt+0x2db/0x6a0 net/socket.c:2180
 __do_sys_setsockopt net/socket.c:2191 [inline]
 __se_sys_setsockopt net/socket.c:2188 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2188
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 753:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free+0x13d/0x180 mm/kasan/common.c:328
 kasan_slab_free include/linux/kasan.h:200 [inline]
 __cache_free mm/slab.c:3439 [inline]
 kmem_cache_free_bulk+0x69/0x460 mm/slab.c:3774
 kfree_bulk include/linux/slab.h:437 [inline]
 kfree_rcu_work+0x51c/0xa10 kernel/rcu/tree.c:3318
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Last potentially related work creation:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 __kasan_record_aux_stack+0x7e/0x90 mm/kasan/generic.c:348
 kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3595
 ip_mc_msfilter+0x712/0xb60 net/ipv4/igmp.c:2510
 do_ip_setsockopt net/ipv4/ip_sockglue.c:1257 [inline]
 ip_setsockopt+0x32e1/0x3ab0 net/ipv4/ip_sockglue.c:1432
 raw_setsockopt+0x274/0x2c0 net/ipv4/raw.c:861
 __sys_setsockopt+0x2db/0x6a0 net/socket.c:2180
 __do_sys_setsockopt net/socket.c:2191 [inline]
 __se_sys_setsockopt net/socket.c:2188 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2188
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Second to last potentially related work creation:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 __kasan_record_aux_stack+0x7e/0x90 mm/kasan/generic.c:348
 call_rcu+0x99/0x790 kernel/rcu/tree.c:3074
 mpls_dev_notify+0x552/0x8a0 net/mpls/af_mpls.c:1656
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:84
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1938
 call_netdevice_notifiers_extack net/core/dev.c:1976 [inline]
 call_netdevice_notifiers net/core/dev.c:1990 [inline]
 unregister_netdevice_many+0x92e/0x1890 net/core/dev.c:10751
 default_device_exit_batch+0x449/0x590 net/core/dev.c:11245
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:167
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88807d37b900
 which belongs to the cache kmalloc-64 of size 64

The buggy address is located 4 bytes inside of
64-byte region [ffff88807d37b900, ffff88807d37b940)

The buggy address belongs to the physical page:
page:ffffea0001f4dec0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807d37b180 pfn:0x7d37b
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888010c41340 ffffea0001c795c8 ffff888010c40200
raw: ffff88807d37b180 ffff88807d37b000 000000010000001f 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x342040(__GFP_IO|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 2963, tgid 2963 (udevd), ts 139732238007, free_ts 139730893262
 prep_new_page mm/page_alloc.c:2441 [inline]
 get_page_from_freelist+0xba2/0x3e00 mm/page_alloc.c:4182
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5408
 __alloc_pages_node include/linux/gfp.h:587 [inline]
 kmem_getpages mm/slab.c:1378 [inline]
 cache_grow_begin+0x75/0x350 mm/slab.c:2584
 cache_alloc_refill+0x27f/0x380 mm/slab.c:2957
 ____cache_alloc mm/slab.c:3040 [inline]
 ____cache_alloc mm/slab.c:3023 [inline]
 __do_cache_alloc mm/slab.c:3267 [inline]
 slab_alloc mm/slab.c:3309 [inline]
 __do_kmalloc mm/slab.c:3708 [inline]
 __kmalloc+0x3b3/0x4d0 mm/slab.c:3719
 kmalloc include/linux/slab.h:586 [inline]
 kzalloc include/linux/slab.h:714 [inline]
 tomoyo_encode2.part.0+0xe9/0x3a0 security/tomoyo/realpath.c:45
 tomoyo_encode2 security/tomoyo/realpath.c:31 [inline]
 tomoyo_encode+0x28/0x50 security/tomoyo/realpath.c:80
 tomoyo_realpath_from_path+0x186/0x620 security/tomoyo/realpath.c:288
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822
 security_inode_getattr+0xcf/0x140 security/security.c:1350
 vfs_getattr fs/stat.c:157 [inline]
 vfs_statx+0x16a/0x390 fs/stat.c:232
 vfs_fstatat+0x8c/0xb0 fs/stat.c:255
 __do_sys_newfstatat+0x91/0x110 fs/stat.c:425
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1356 [inline]
 free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1406
 free_unref_page_prepare mm/page_alloc.c:3328 [inline]
 free_unref_page+0x19/0x6a0 mm/page_alloc.c:3423
 __vunmap+0x85d/0xd30 mm/vmalloc.c:2667
 __vfree+0x3c/0xd0 mm/vmalloc.c:2715
 vfree+0x5a/0x90 mm/vmalloc.c:2746
 __do_replace+0x16b/0x890 net/ipv6/netfilter/ip6_tables.c:1117
 do_replace net/ipv6/netfilter/ip6_tables.c:1157 [inline]
 do_ip6t_set_ctl+0x90d/0xb90 net/ipv6/netfilter/ip6_tables.c:1639
 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
 ipv6_setsockopt+0x122/0x180 net/ipv6/ipv6_sockglue.c:1026
 tcp_setsockopt+0x136/0x2520 net/ipv4/tcp.c:3696
 __sys_setsockopt+0x2db/0x6a0 net/socket.c:2180
 __do_sys_setsockopt net/socket.c:2191 [inline]
 __se_sys_setsockopt net/socket.c:2188 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2188
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Memory state around the buggy address:
 ffff88807d37b800: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
 ffff88807d37b880: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
>ffff88807d37b900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff88807d37b980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88807d37ba00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc

---
 net/ipv4/igmp.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

@@ -2360,9 +2360,10 @@ int ip_mc_source(int add, int omode, str
 				newpsl->sl_addr[i] = psl->sl_addr[i];
 			/* decrease mem now to avoid the memleak warning */
 			atomic_sub(IP_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc);
-			kfree_rcu(psl, rcu);
 		}
 		rcu_assign_pointer(pmc->sflist, newpsl);
+		if (psl)
+			kfree_rcu(psl, rcu);
 		psl = newpsl;
 	}
 	rv = 1;	/* > 0 for insert logic below if sl_count is 0 */

@@ -2460,11 +2461,13 @@ int ip_mc_msfilter(struct sock *sk, stru
 			psl->sl_count, psl->sl_addr, 0);
 		/* decrease mem now to avoid the memleak warning */
 		atomic_sub(IP_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc);
-		kfree_rcu(psl, rcu);
-	} else
+	} else {
 		(void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode,
 			0, NULL, 0);
+	}
 	rcu_assign_pointer(pmc->sflist, newpsl);
+	if (psl)
+		kfree_rcu(psl, rcu);
 	pmc->sfmode = msf->imsf_fmode;
 	err = 0;
 done:

From: Sandipan Das <[email protected]>

[ Upstream commit 5a1bde46f98b893cda6122b00e94c0c40a6ead3c ]

On some x86 processors, CPUID leaf 0xA provides information on Architectural Performance Monitoring features. It advertises a PMU version which Qemu uses to determine the availability of additional MSRs to manage the PMCs.

Upon receiving a KVM_GET_SUPPORTED_CPUID ioctl request for the same, the kernel constructs return values based on the x86_pmu_capability irrespective of the vendor.

This leaf and the additional MSRs are not supported on AMD and Hygon processors. If AMD PerfMonV2 is detected, the PMU version is set to 2 and guest startup breaks because of an attempt to access a non-existent MSR. Return zeros to avoid this.

Message-Id: <3fef83d9c2b2f7516e8ff50d60851f29a4bcb716.1651058600.git.sandipan.das@amd.com>

---
 arch/x86/kvm/cpuid.c | 5 +++++
 1 file changed, 5 insertions(+)

index a6f8600672d7..c068027ac55f 100644
@@ -502,6 +502,11 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
 		union cpuid10_eax eax;
 		union cpuid10_edx edx;
 
+		if (!static_cpu_has(X86_FEATURE_ARCH_PERFMON)) {
+			entry->eax = entry->ebx = entry->ecx = entry->edx = 0;
+			break;
+		}
+
 		perf_get_x86_pmu_capability(&cap);
 
 		/*

2.35.1

From: Thadeu Lima de Souza Cascardo <[email protected]>

When dropping the rtnl_lock for looking up for a module, the device may be removed, releasing the qdisc and class memory. Right after trying to load the module, cl_ops->put is called, leading to a potential use-after-free.

Though commit e368fdb61d8e ("net: sched: use Qdisc rcu API instead of relying on rtnl lock") fixes this, it involves a lot of refactoring of the net/sched/ code, complicating its backport.

This fix calls cl_ops->put before dropping rtnl_lock as it will be called either way, and zeroes it out so it won't be called again on the exit path.

This has been shown to stop the following KASAN report with the reproducer:

[  256.609111] ==================================================================
[  256.609585] BUG: KASAN: use-after-free in cbq_put+0x20/0xd0 at addr ffff880021daaba0
[  256.610078] Read of size 4 by task total_cbq/11184
[  256.610380] CPU: 0 PID: 11184 Comm: total_cbq Not tainted 4.9.311 #78
[  256.610778]  ffff8800215875a8 ffffffff96e18735 ffff880024803080 ffff880021daaa80
[  256.611274]  ffff8800215875d0 ffffffff96334841 ffffed00043b5574 ffffed00043b5574
[  256.611768]  ffff880024803080 ffff880021587658 ffffffff96334af8 0000000000000000
[  256.612186] Call Trace:
[  256.612344]  [<ffffffff96e18735>] dump_stack+0x6d/0x8b
[  256.612632]  [<ffffffff96334841>] kasan_object_err+0x21/0x70
[  256.612973]  [<ffffffff96334af8>] kasan_report.part.1+0x218/0x4f0
[  256.613349]  [<ffffffff96c5a2e0>] ? cbq_put+0x20/0xd0
[  256.613634]  [<ffffffff96333cd6>] ? kasan_unpoison_shadow+0x36/0x50
[  256.613993]  [<ffffffff96335105>] kasan_report+0x25/0x30
[  256.614288]  [<ffffffff96333701>] __asan_load4+0x61/0x80
[  256.614580]  [<ffffffff96c5a2e0>] cbq_put+0x20/0xd0
[  256.614862]  [<ffffffff96c53184>] tc_ctl_tfilter+0x4f4/0xb80
[  256.615151]  [<ffffffff96c52c90>] ? tfilter_notify+0x140/0x140
[  256.615478]  [<ffffffff960056ef>] ? do_syscall_64+0xef/0x190
[  256.615799]  [<ffffffff96e28a8e>] ? entry_SYSCALL_64_after_swapgs+0x58/0xc6
[  256.616190]  [<ffffffff96bce3f6>] ? sock_sendmsg+0x76/0x80
[  256.616484]  [<ffffffff96bce53f>] ? sock_write_iter+0x13f/0x1f0
[  256.616833]  [<ffffffff96367b02>] ? __vfs_write+0x262/0x3c0
[  256.617152]  [<ffffffff96369dc9>] ? vfs_write+0xf9/0x260
[  256.617451]  [<ffffffff9636c009>] ? SyS_write+0xc9/0x1b0
[  256.617754]  [<ffffffff960decda>] ? ns_capable_common+0x5a/0xa0
[  256.618067]  [<ffffffff960ded33>] ? ns_capable+0x13/0x20
[  256.618334]  [<ffffffff96c9125d>] ? __netlink_ns_capable+0x6d/0x80
[  256.618666]  [<ffffffff96c2750f>] rtnetlink_rcv_msg+0x1af/0x410
[  256.618969]  [<ffffffff96c90d6b>] ? netlink_compare+0x5b/0x70
[  256.619295]  [<ffffffff96c27360>] ? rtnl_newlink+0xc60/0xc60
[  256.619587]  [<ffffffff96c94214>] ? __netlink_lookup+0x1a4/0x240
[  256.619885]  [<ffffffff96c94070>] ? netlink_broadcast+0x20/0x20
[  256.620179]  [<ffffffff96c97815>] netlink_rcv_skb+0x155/0x190
[  256.620463]  [<ffffffff96c27360>] ? rtnl_newlink+0xc60/0xc60
[  256.620748]  [<ffffffff96c1e758>] rtnetlink_rcv+0x28/0x30
[  256.621015]  [<ffffffff96c96d11>] netlink_unicast+0x2f1/0x3b0
[  256.621354]  [<ffffffff96c96a20>] ? netlink_attachskb+0x340/0x340
[  256.621765]  [<ffffffff96c9733e>] netlink_sendmsg+0x56e/0x6f0
[  256.622181]  [<ffffffff96c96dd0>] ? netlink_unicast+0x3b0/0x3b0
[  256.622578]  [<ffffffff96c96dd0>] ? netlink_unicast+0x3b0/0x3b0
[  256.622893]  [<ffffffff96bce3f6>] sock_sendmsg+0x76/0x80
[  256.623157]  [<ffffffff96bce53f>] sock_write_iter+0x13f/0x1f0
[  256.623440]  [<ffffffff96bce400>] ? sock_sendmsg+0x80/0x80
[  256.623729]  [<ffffffff966a8032>] ? iov_iter_init+0x82/0xc0
[  256.624006]  [<ffffffff96367b02>] __vfs_write+0x262/0x3c0
[  256.624274]  [<ffffffff963678a0>] ? default_llseek+0x120/0x120
[  256.624566]  [<ffffffff965e8c02>] ? common_file_perm+0x92/0x170
[  256.624925]  [<ffffffff96369a58>] ? rw_verify_area+0x78/0x140
[  256.625277]  [<ffffffff96369dc9>] vfs_write+0xf9/0x260
[  256.625593]  [<ffffffff9636c009>] SyS_write+0xc9/0x1b0
[  256.625891]  [<ffffffff9636bf40>] ? SyS_read+0x1b0/0x1b0
[  256.626154]  [<ffffffff9636bf40>] ? SyS_read+0x1b0/0x1b0
[  256.626422]  [<ffffffff960056ef>] do_syscall_64+0xef/0x190
[  256.626697]  [<ffffffff96e28a8e>] entry_SYSCALL_64_after_swapgs+0x58/0xc6
[  256.627033] Object at ffff880021daaa80, in cache kmalloc-512 size: 512
[  256.627415] Allocated:
[  256.627563] PID = 164
[  256.627711]  save_stack_trace+0x1b/0x20
[  256.627947]  save_stack+0x46/0xd0
[  256.628151]  kasan_kmalloc+0xad/0xe0
[  256.628362]  kmem_cache_alloc_trace+0xe8/0x1e0
[  256.628637]  cbq_change_class+0x8b6/0xde0
[  256.628896]  tc_ctl_tclass+0x56a/0x5b0
[  256.629129]  rtnetlink_rcv_msg+0x1af/0x410
[  256.629380]  netlink_rcv_skb+0x155/0x190
[  256.629621]  rtnetlink_rcv+0x28/0x30
[  256.629840]  netlink_unicast+0x2f1/0x3b0
[  256.630066]  netlink_sendmsg+0x56e/0x6f0
[  256.630263]  sock_sendmsg+0x76/0x80
[  256.630456]  sock_write_iter+0x13f/0x1f0
[  256.630698]  __vfs_write+0x262/0x3c0
[  256.630918]  vfs_write+0xf9/0x260
[  256.631123]  SyS_write+0xc9/0x1b0
[  256.631327]  do_syscall_64+0xef/0x190
[  256.631553]  entry_SYSCALL_64_after_swapgs+0x58/0xc6
[  256.631827] Freed:
[  256.631931] PID = 164
[  256.632048]  save_stack_trace+0x1b/0x20
[  256.632241]  save_stack+0x46/0xd0
[  256.632408]  kasan_slab_free+0x71/0xb0
[  256.632597]  kfree+0x8c/0x1a0
[  256.632751]  cbq_destroy_class+0x85/0xa0
[  256.632948]  cbq_destroy+0xfa/0x120
[  256.633125]  qdisc_destroy+0xa1/0x140
[  256.633309]  dev_shutdown+0x12d/0x190
[  256.633497]  rollback_registered_many+0x43c/0x5b0
[  256.633753]  unregister_netdevice_many+0x2c/0x130
[  256.634041]  rtnl_delete_link+0xb3/0x100
[  256.634283]  rtnl_dellink+0x19c/0x360
[  256.634509]  rtnetlink_rcv_msg+0x1af/0x410
[  256.634760]  netlink_rcv_skb+0x155/0x190
[  256.635001]  rtnetlink_rcv+0x28/0x30
[  256.635221]  netlink_unicast+0x2f1/0x3b0
[  256.635463]  netlink_sendmsg+0x56e/0x6f0
[  256.635700]  sock_sendmsg+0x76/0x80
[  256.635915]  sock_write_iter+0x13f/0x1f0
[  256.636156]  __vfs_write+0x262/0x3c0
[  256.636376]  vfs_write+0xf9/0x260
[  256.636580]  SyS_write+0xc9/0x1b0
[  256.636787]  do_syscall_64+0xef/0x190
[  256.637013]  entry_SYSCALL_64_after_swapgs+0x58/0xc6
[  256.637316] Memory state around the buggy address:
[  256.637610]  ffff880021daaa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  256.638047]  ffff880021daab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  256.638487] >ffff880021daab80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  256.638924]                                ^
[  256.639186]  ffff880021daac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  256.639624]  ffff880021daac80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc

---
 net/sched/cls_api.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

@@ -268,10 +268,13 @@ replay:
 		err = -ENOENT;
 		tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND]);
 		if (tp_ops == NULL) {
-#ifdef CONFIG_MODULES
 			struct nlattr *kind = tca[TCA_KIND];
 			char name[IFNAMSIZ];
 
+			if (cl)
+				cops->put(q, cl);
+			cl = 0;
+#ifdef CONFIG_MODULES
 			if (kind != NULL &&
 			    nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) {
 				rtnl_unlock();