4.14.226-rc1 review

From: Greg Kroah-Hartman <[email protected]>

This is the start of the stable review cycle for the 4.14.226 release. There are 95 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 Wed, 17 Mar 2021 13:57:24 +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-4.14.226-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-4.14.y
and the diffstat can be found below.

thanks,

greg k-h

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

Greg Kroah-Hartman <[email protected]>

    Linux 4.14.226-rc1

Juergen Gross <[email protected]>
xen/events: avoid handling the same event on two cpus at the same time

Juergen Gross <[email protected]>
xen/events: don't unmask an event channel when an eoi is pending

Juergen Gross <[email protected]>
xen/events: reset affinity of 2-level event when tearing it down

Navid Emamdoost <[email protected]>
iio: imu: adis16400: release allocated memory on failure

Marc Zyngier <[email protected]>
KVM: arm64: Fix exclusive limit for IPA size

Boyang Yu <[email protected]>
hwmon: (lm90) Fix max6658 sporadic wrong temperature reading

Lior Ribak <[email protected]>
binfmt_misc: fix possible deadlock in bm_register_write

Naveen N. Rao <[email protected]>
powerpc/64s: Fix instruction encoding for lis in ppc_function_entry()

Alexey Dobriyan <[email protected]>
prctl: fix PR_SET_MM_AUXV kernel stack leak

Matthew Wilcox (Oracle) <[email protected]>
include/linux/sched/mm.h: use rcu_dereference in in_vfork()

Arnd Bergmann <[email protected]>
stop_machine: mark helpers __always_inline

Daiyue Zhang <[email protected]>
configfs: fix a use-after-free in __configfs_open_file

Jia-Ju Bai <[email protected]>
block: rsxx: fix error return code of rsxx_pci_probe()

Ondrej Mosnacek <[email protected]>
NFSv4.2: fix return value of _nfs4_get_security_label()

Sergey Shtylyov <[email protected]>
sh_eth: fix TRSCER mask for R7S72100

Ian Abbott <[email protected]>
staging: comedi: pcl818: Fix endian problem for AI command data

Ian Abbott <[email protected]>
staging: comedi: pcl711: Fix endian problem for AI command data

Ian Abbott <[email protected]>
staging: comedi: me4000: Fix endian problem for AI command data

Ian Abbott <[email protected]>
staging: comedi: dmm32at: Fix endian problem for AI command data

Ian Abbott <[email protected]>
staging: comedi: das800: Fix endian problem for AI command data

Ian Abbott <[email protected]>
staging: comedi: das6402: Fix endian problem for AI command data

Ian Abbott <[email protected]>
staging: comedi: adv_pci1710: Fix endian problem for AI command data

Ian Abbott <[email protected]>
staging: comedi: addi_apci_1500: Fix endian problem for command sample

Ian Abbott <[email protected]>
staging: comedi: addi_apci_1032: Fix endian problem for COS sample

Lee Gibson <[email protected]>
staging: rtl8192e: Fix possible buffer overflow in _rtl92e_wx_set_scan

Lee Gibson <[email protected]>
staging: rtl8712: Fix possible buffer overflow in r8712_sitesurvey_cmd

Dan Carpenter <[email protected]>
staging: ks7010: prevent buffer overflow in ks_wlan_set_scan()

Dan Carpenter <[email protected]>
staging: rtl8188eu: fix potential memory corruption in rtw_check_beacon_data()

Dan Carpenter <[email protected]>
staging: rtl8712: unterminated string leads to read overflow

Dan Carpenter <[email protected]>

    staging: rtl8188eu: prevent ->ssid overflow in rtw_wx_set_scan()

Dan Carpenter <[email protected]>

    staging: rtl8192u: fix ->ssid overflow in r8192_wx_set_scan()

Shuah Khan <[email protected]>
usbip: fix vhci_hcd attach_store() races leading to gpf

Shuah Khan <[email protected]>
usbip: fix stub_dev usbip_sockfd_store() races leading to gpf

Shuah Khan <[email protected]>
usbip: fix vudc to check for stream socket

Shuah Khan <[email protected]>
usbip: fix vhci_hcd to check for stream socket

Shuah Khan <[email protected]>
usbip: fix stub_dev to check for stream socket

Sebastian Reichel <[email protected]>

    USB: serial: cp210x: add some more GE USB IDs

Karan Singhal <[email protected]>

    USB: serial: cp210x: add ID for Acuity Brands nLight Air Adapter

Niv Sardi <[email protected]>
USB: serial: ch341: add new Product ID

Pavel Skripkin <[email protected]>
USB: serial: io_edgeport: fix memory leak in edge_startup

Forest Crossman <[email protected]>
usb: xhci: Fix ASMedia ASM1042A and ASM3242 DMA addressing

Mathias Nyman <[email protected]>
xhci: Improve detection of device initiated wake signal.

Yoshihiro Shimoda <[email protected]>
usb: renesas_usbhs: Clear PIPECFG for re-enabling pipe with other EPNUM

Ruslan Bilovol <[email protected]>
usb: gadget: f_uac1: stop playback on function disable

Ruslan Bilovol <[email protected]>
usb: gadget: f_uac2: always increase endpoint max_packet_size by one audio slot

Dan Carpenter <[email protected]>
USB: gadget: u_ether: Fix a configfs return code

Yorick de Wid <[email protected]>
Goodix Fingerprint device is not a modem

Adrian Hunter <[email protected]>
mmc: core: Fix partition switch time for eMMC

Stefan Haberland <[email protected]>
s390/dasd: fix hanging IO request during DASD driver unbind

Stefan Haberland <[email protected]>
s390/dasd: fix hanging DASD driver unbind

Eric W. Biederman <[email protected]>
Revert 95ebabde382c ("capabilities: Don't allow writing ambiguous v3 file capabilities")

Takashi Iwai <[email protected]>
ALSA: usb-audio: Fix "cannot get freq eq" errors on Dell AE515 sound bar

Takashi Iwai <[email protected]>
ALSA: hda: Avoid spurious unsol event handling during S3/S4

Takashi Iwai <[email protected]>
ALSA: hda: Drop the BATCH workaround for AMD controllers

Takashi Iwai <[email protected]>
ALSA: hda/hdmi: Cancel pending works before suspend

Mike Christie <[email protected]>
scsi: libiscsi: Fix iscsi_prep_scsi_cmd_pdu() error handling

Heiko Carstens <[email protected]>
s390/smp: __smp_rescan_cpus() - move cpumask away from stack

Krzysztof Wilczyński <[email protected]>
PCI: mediatek: Add missing of_node_put() to fix reference leak

Martin Kaiser <[email protected]>
PCI: xgene-msi: Fix race in installing chained irq handler

Athira Rajeev <[email protected]>
powerpc/perf: Record counter overflow always if SAMPLE_IP is unset

Nicholas Piggin <[email protected]>
powerpc: improve handling of unrecoverable system reset

Chaotian Jing <[email protected]>
mmc: mediatek: fix race condition between msdc_request_timeout and irq

Christophe JAILLET <[email protected]>
mmc: mxs-mmc: Fix a resource leak in an error handling path in 'mxs_mmc_probe()'

Steven J. Magnani <[email protected]>
udf: fix silent AED tagLocation corruption

Guangbin Huang <[email protected]>
net: phy: fix save wrong speed and duplex problem if autoneg is on

Maxim Mikityanskiy <[email protected]>
media: usbtv: Fix deadlock on suspend

Eric Farman <[email protected]>
s390/cio: return -EFAULT if copy_to_user() fails

Artem Lapkin <[email protected]>
drm: meson_drv add shutdown function

Daniel Vetter <[email protected]>
drm/compat: Clear bounce structures

Wang Qing <[email protected]>
s390/cio: return -EFAULT if copy_to_user() fails again

Ian Rogers <[email protected]>
perf traceevent: Ensure read cmdlines are null terminated.

Joakim Zhang <[email protected]>
net: stmmac: stop each tx channel independently

Paul Cercueil <[email protected]>
net: davicom: Fix regulator not turned off on driver removal

Paul Cercueil <[email protected]>
net: davicom: Fix regulator not turned off on failed probe

Xie He <[email protected]>
net: lapbether: Remove netif_start_queue / netif_stop_queue

Paul Moore <[email protected]>
cipso,calipso: resolve a number of problems with the DOI refcounts

Daniele Palmas <[email protected]>
net: usb: qmi_wwan: allow qmimux add/del with master up

Maximilian Heyne <[email protected]>
net: sched: avoid duplicates in classes dump

Ong Boon Leong <[email protected]>
net: stmmac: fix incorrect DMA channel intr enable setting of EQoS v4.10

Kevin(Yudong) Yang <[email protected]>
net/mlx4_en: update moderation when config reset

Sergey Shtylyov <[email protected]>
sh_eth: fix TRSCER mask for SH771x

Linus Torvalds <[email protected]>
Revert "mm, slub: consider rest of partial list if acquire_slab() fails"

Joe Lawrence <[email protected]>
scripts/recordmcount.{c,pl}: support -ffunction-sections .text.* section names

Paulo Alcantara <[email protected]>
cifs: return proper error code in statfs(2)

Vasily Averin <[email protected]>
netfilter: x_tables: gpf inside xt_find_revision()

Joakim Zhang <[email protected]>
can: flexcan: enable RX FIFO after FRZ/HALT valid

Joakim Zhang <[email protected]>
can: flexcan: assert FRZ bit in flexcan_chip_freeze()

Oleksij Rempel <[email protected]>
can: skb: can_skb_set_owner(): fix ref counting if socket was closed before setting skb ownership

Balazs Nemeth <[email protected]>

    net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0

Balazs Nemeth <[email protected]>
net: check if protocol extracted by virtio_net_hdr_set_proto is correct

Maxim Mikityanskiy <[email protected]>
net: Introduce parse_protocol header_ops callback

Daniel Borkmann <[email protected]>
net: Fix gro aggregation for udp encaps with zero csum

Felix Fietkau <[email protected]>
ath9k: fix transmitting to stations in dynamic SMPS mode

Jakub Kicinski <[email protected]>
ethernet: alx: fix order of calls on resume

Dmitry V. Levin <[email protected]>
uapi: nfnetlink_cthelper.h: fix userspace compilation error

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

Diffstat:

 Makefile                                          |   4 +-
 arch/powerpc/include/asm/code-patching.h          |   2 +-
 arch/powerpc/kernel/traps.c                       |   5 +-
 arch/powerpc/perf/core-book3s.c                   |  19 +++-
 arch/s390/kernel/smp.c                            |   2 +-
 drivers/block/rsxx/core.c                         |   1 +
 drivers/gpu/drm/drm_ioc32.c                       |  11 ++
 drivers/gpu/drm/meson/meson_drv.c                 |  11 ++
 drivers/hwmon/lm90.c                              |  42 ++++++-
 drivers/iio/imu/adis_buffer.c                     |   5 +-
 drivers/media/usb/usbtv/usbtv-audio.c             |   2 +-
 drivers/mmc/core/mmc.c                            |  15 ++-
 drivers/mmc/host/mtk-sd.c                         |  18 +--
 drivers/mmc/host/mxs-mmc.c                        |   2 +-
 drivers/net/can/flexcan.c                         |  12 +-
 drivers/net/ethernet/atheros/alx/main.c           |   7 +-
 drivers/net/ethernet/davicom/dm9000.c             |  21 +++-
 drivers/net/ethernet/mellanox/mlx4/en_ethtool.c   |   2 +-
 drivers/net/ethernet/mellanox/mlx4/en_netdev.c    |   2 +
 drivers/net/ethernet/mellanox/mlx4/mlx4_en.h      |   1 +
 drivers/net/ethernet/renesas/sh_eth.c             |   5 +
 drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c  |  19 +++-
 drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c  |   4 -
 drivers/net/phy/phy.c                             |   7 +-
 drivers/net/usb/qmi_wwan.c                        |  14 ---
 drivers/net/wan/lapbether.c                       |   3 -
 drivers/net/wireless/ath/ath9k/ath9k.h            |   3 +-
 drivers/net/wireless/ath/ath9k/xmit.c             |   6 +
 drivers/pci/host/pci-xgene-msi.c                  |  10 +-
 drivers/pci/host/pcie-mediatek.c                  |   7 +-
 drivers/s390/block/dasd.c                         |   6 +-
 drivers/s390/cio/vfio_ccw_ops.c                   |   6 +-
 drivers/scsi/libiscsi.c                           |  11 +-
 drivers/staging/comedi/drivers/addi_apci_1032.c   |   4 +-
 drivers/staging/comedi/drivers/addi_apci_1500.c   |  18 +--
 drivers/staging/comedi/drivers/adv_pci1710.c      |  10 +-
 drivers/staging/comedi/drivers/das6402.c          |   2 +-
 drivers/staging/comedi/drivers/das800.c           |   2 +-
 drivers/staging/comedi/drivers/dmm32at.c          |   2 +-
 drivers/staging/comedi/drivers/me4000.c           |   2 +-
 drivers/staging/comedi/drivers/pcl711.c           |   2 +-
 drivers/staging/comedi/drivers/pcl818.c           |   2 +-
 drivers/staging/ks7010/ks_wlan_net.c              |   6 +-
 drivers/staging/rtl8188eu/core/rtw_ap.c           |   5 +
 drivers/staging/rtl8188eu/os_dep/ioctl_linux.c    |   6 +-
 drivers/staging/rtl8192e/rtl8192e/rtl_wx.c        |   7 +-
 drivers/staging/rtl8192u/r8192U_wx.c              |   6 +-
 drivers/staging/rtl8712/rtl871x_cmd.c             |   6 +-
 drivers/staging/rtl8712/rtl871x_ioctl_linux.c     |   2 +-
 drivers/usb/class/cdc-acm.c                       |   5 +
 drivers/usb/gadget/function/f_uac1.c              |   1 +
 drivers/usb/gadget/function/f_uac2.c              |   2 +-
 drivers/usb/gadget/function/u_ether_configfs.h    |   5 +-
 drivers/usb/host/xhci-pci.c                       |   8 +-
 drivers/usb/host/xhci.c                           |  16 ++-
 drivers/usb/renesas_usbhs/pipe.c                  |   2 +
 drivers/usb/serial/ch341.c                        |   1 +
 drivers/usb/serial/cp210x.c                       |   3 +
 drivers/usb/serial/io_edgeport.c                  |  26 +++--
 drivers/usb/usbip/stub_dev.c                      |  42 +++++--
 drivers/usb/usbip/vhci_sysfs.c                    |  39 ++++++-
 drivers/usb/usbip/vudc_sysfs.c                    |  10 ++
 drivers/xen/events/events_2l.c                    |  22 ++--
 drivers/xen/events/events_base.c                  | 132 ++++++++++++++++------
 drivers/xen/events/events_fifo.c                  |   7 --
 drivers/xen/events/events_internal.h              |  22 ++--
 fs/binfmt_misc.c                                  |  29 +++--
 fs/cifs/cifsfs.c                                  |   2 +-
 fs/configfs/file.c                                |   6 +-
 fs/nfs/nfs4proc.c                                 |   2 +-
 fs/udf/inode.c                                    |   9 +-
 include/linux/can/skb.h                           |   8 +-
 include/linux/netdevice.h                         |  10 ++
 include/linux/sched/mm.h                          |   3 +-
 include/linux/stop_machine.h                      |  11 +-
 include/linux/virtio_net.h                        |   7 +-
 include/uapi/linux/netfilter/nfnetlink_cthelper.h |   2 +-
 kernel/sys.c                                      |   2 +-
 mm/slub.c                                         |   2 +-
 net/ipv4/cipso_ipv4.c                             |  11 +-
 net/ipv4/udp_offload.c                            |   2 +-
 net/ipv6/calipso.c                                |  14 +--
 net/mpls/mpls_gso.c                               |   3 +
 net/netfilter/x_tables.c                          |   6 +-
 net/netlabel/netlabel_cipso_v4.c                  |   3 +
 net/sched/sch_api.c                               |   8 +-
 scripts/recordmcount.c                            |   2 +-
 scripts/recordmcount.pl                           |  13 +++
 security/commoncap.c                              |  12 +-
 sound/pci/hda/hda_bind.c                          |   4 +
 sound/pci/hda/hda_controller.c                    |   7 --
 sound/pci/hda/patch_hdmi.c                        |  13 +++
 sound/usb/quirks.c                                |   1 +
 tools/perf/util/trace-event-read.c                |   1 +
 virt/kvm/arm/mmu.c                                |   2 +-
 95 files changed, 616 insertions(+), 289 deletions(-)

From: Greg Kroah-Hartman <[email protected]>

From: Dmitry V. Levin <[email protected]>

commit c33cb0020ee6dd96cc9976d6085a7d8422f6dbed upstream.

Apparently, <linux/netfilter/nfnetlink_cthelper.h> and <linux/netfilter/nfnetlink_acct.h> could not be included into the same compilation unit because of a cut-and-paste typo in the former header.

---
 include/uapi/linux/netfilter/nfnetlink_cthelper.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -5,7 +5,7 @@
 #define NFCT_HELPER_STATUS_DISABLED	0
 #define NFCT_HELPER_STATUS_ENABLED	1
 
-enum nfnl_acct_msg_types {
+enum nfnl_cthelper_msg_types {
 	NFNL_MSG_CTHELPER_NEW,
 	NFNL_MSG_CTHELPER_GET,
 	NFNL_MSG_CTHELPER_DEL,

From: Greg Kroah-Hartman <[email protected]>

From: Jakub Kicinski <[email protected]>

commit a4dcfbc4ee2218abd567d81d795082d8d4afcdf6 upstream.

netif_device_attach() will unpause the queues so we can't call it before __alx_open(). This went undetected until commit b0999223f224 ("alx: add ability to allocate and free alx_napi structures") but now if stack tries to xmit immediately on resume before __alx_open() we'll crash on the NAPI being null:

 BUG: kernel NULL pointer dereference, address: 0000000000000198
 CPU: 0 PID: 12 Comm: ksoftirqd/0 Tainted: G           OE 5.10.0-3-amd64 #1 Debian 5.10.13-1
 Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./H77-D3H, BIOS F15 11/14/2013
 RIP: 0010:alx_start_xmit+0x34/0x650 [alx]
 Code: 41 56 41 55 41 54 55 53 48 83 ec 20 0f b7 57 7c 8b 8e b0

0b 00 00 39 ca 72 06 89 d0 31 d2 f7 f1 89 d2 48 8b 84 df
RSP: 0018:ffffb09240083d28 EFLAGS: 00010297
RAX: 0000000000000000 RBX: ffffa04d80ae7800 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffa04d80afa000 RDI: ffffa04e92e92a00
RBP: 0000000000000042 R08: 0000000000000100 R09: ffffa04ea3146700
R10: 0000000000000014 R11: 0000000000000000 R12: ffffa04e92e92100
R13: 0000000000000001 R14: ffffa04e92e92a00 R15: ffffa04e92e92a00
FS: 0000000000000000(0000) GS:ffffa0508f600000(0000) knlGS:0000000000000000 i915 0000:00:02.0: vblank wait timed out on crtc 0
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000198 CR3: 000000004460a001 CR4: 00000000001706f0

 Call Trace:
  dev_hard_start_xmit+0xc7/0x1e0
  sch_direct_xmit+0x10f/0x310

---
 drivers/net/ethernet/atheros/alx/main.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

@@ -1904,13 +1904,16 @@ static int alx_resume(struct device *dev
 
 	if (!netif_running(alx->dev))
 		return 0;
-	netif_device_attach(alx->dev);
 
 	rtnl_lock();
 	err = __alx_open(alx, true);
 	rtnl_unlock();
+	if (err)
+		return err;
+
+	netif_device_attach(alx->dev);
 
-	return err;
+	return 0;
 }
 
 static SIMPLE_DEV_PM_OPS(alx_pm_ops, alx_suspend, alx_resume);

From: Greg Kroah-Hartman <[email protected]>

From: Felix Fietkau <[email protected]>

commit 3b9ea7206d7e1fdd7419cbd10badd3b2c80d04b4 upstream.

When transmitting to a receiver in dynamic SMPS mode, all transmissions that use multiple spatial streams need to be sent using CTS-to-self or RTS/CTS to give the receiver's extra chains some time to wake up.
This fixes the tx rate getting stuck at <= MCS7 for some clients, especially Intel ones, which make aggressive use of SMPS.

---
 drivers/net/wireless/ath/ath9k/ath9k.h |    3 ++-
 drivers/net/wireless/ath/ath9k/xmit.c  |    6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

@@ -179,7 +179,8 @@ struct ath_frame_info {
 	s8 txq;
 	u8 keyix;
 	u8 rtscts_rate;
-	u8 retries : 7;
+	u8 retries : 6;
+	u8 dyn_smps : 1;
 	u8 baw_tracked : 1;
 	u8 tx_power;
 	enum ath9k_key_type keytype:2;

@@ -1314,6 +1314,11 @@ static void ath_buf_set_rate(struct ath_
 				 is_40, is_sgi, is_sp);
 			if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC))
 				info->rates[i].RateFlags |= ATH9K_RATESERIES_STBC;
+			if (rix >= 8 && fi->dyn_smps) {
+				info->rates[i].RateFlags |=
+					ATH9K_RATESERIES_RTS_CTS;
+				info->flags |= ATH9K_TXDESC_CTSENA;
+			}
 
 			info->txpower[i] = ath_get_rate_txpower(sc, bf, rix,
 								is_40, false);

@@ -2178,6 +2183,7 @@ static void setup_frame_info(struct ieee
 		fi->keyix = an->ps_key;
 	else
 		fi->keyix = ATH9K_TXKEYIX_INVALID;
+	fi->dyn_smps = sta && sta->smps_mode == IEEE80211_SMPS_DYNAMIC;
 	fi->keytype = keytype;
 	fi->framelen = framelen;
 	fi->tx_power = txpower;

From: Greg Kroah-Hartman <[email protected]>

From: Daniel Borkmann <[email protected]>

commit 89e5c58fc1e2857ccdaae506fb8bc5fed57ee063 upstream.

We noticed a GRO issue for UDP-based encaps such as vxlan/geneve when the csum for the UDP header itself is 0. In that case, GRO aggregation does not take place on the phys dev, but instead is deferred to the vxlan/geneve driver (see trace below).

The reason is essentially that GRO aggregation bails out in udp_gro_receive() for such case when drivers marked the skb with CHECKSUM_UNNECESSARY (ice, i40e, others) where for non-zero csums 2abb7cdc0dc8 ("udp: Add support for doing checksum unnecessary conversion") promotes those skbs to CHECKSUM_COMPLETE and napi context has csum_valid set. This is however not the case for zero UDP csum (here: csum_cnt is still 0 and csum_valid continues to be false).

At the same time 57c67ff4bd92 ("udp: additional GRO support") added matches on !uh->check ^ !uh2->check as part to determine candidates for aggregation, so it certainly is expected to handle zero csums in udp_gro_receive(). The purpose of the check added via 662880f44203 ("net: Allow GRO to use and set levels of checksum unnecessary") seems to catch bad csum and stop aggregation right away.

One way to fix aggregation in the zero case is to only perform the !csum_valid check in udp_gro_receive() if uh->check is infact non-zero.

Before:

[...]

  swapper     0 [008]   731.946506: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497100400 len=1500   (1)
  swapper     0 [008]   731.946507: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497100200 len=1500
  swapper     0 [008]   731.946507: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497101100 len=1500
  swapper     0 [008]   731.946508: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497101700 len=1500
  swapper     0 [008]   731.946508: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497101b00 len=1500
  swapper     0 [008]   731.946508: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497100600 len=1500
  swapper     0 [008]   731.946508: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497100f00 len=1500
  swapper     0 [008]   731.946509: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497100a00 len=1500
  swapper     0 [008]   731.946516: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497100500 len=1500
  swapper     0 [008]   731.946516: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497100700 len=1500
  swapper     0 [008]   731.946516: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497101d00 len=1500   (2)
  swapper     0 [008]   731.946517: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497101000 len=1500
  swapper     0 [008]   731.946517: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497101c00 len=1500
  swapper     0 [008]   731.946517: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497101400 len=1500
  swapper     0 [008]   731.946518: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497100e00 len=1500
  swapper     0 [008]   731.946518: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497101600 len=1500
  swapper     0 [008]   731.946521: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff966497100800 len=774
  swapper     0 [008]   731.946530: net:netif_receive_skb: dev=test_vxlan skbaddr=0xffff966497100400 len=14032 (1)
  swapper     0 [008]   731.946530: net:netif_receive_skb: dev=test_vxlan skbaddr=0xffff966497101d00 len=9112  (2)

[...]

  # netperf -H 10.55.10.4 -t TCP_STREAM -l 20
  MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.55.10.4 () port 0 AF_INET : demo
  Recv   Send    Send
  Socket Socket  Message  Elapsed
  Size   Size    Size     Time     Throughput
  bytes  bytes   bytes    secs.    10^6bits/sec

87380 16384 16384 20.01 13129.24

After:

[...]

  swapper     0 [026]   521.862641: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff93ab0d479000 len=11286 (1)
  swapper     0 [026]   521.862643: net:netif_receive_skb: dev=test_vxlan skbaddr=0xffff93ab0d479000 len=11236 (1)
  swapper     0 [026]   521.862650: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff93ab0d478500 len=2898  (2)
  swapper     0 [026]   521.862650: net:netif_receive_skb: dev=enp10s0f0  skbaddr=0xffff93ab0d479f00 len=8490  (3)
  swapper     0 [026]   521.862653: net:netif_receive_skb: dev=test_vxlan skbaddr=0xffff93ab0d478500 len=2848  (2)
  swapper     0 [026]   521.862653: net:netif_receive_skb: dev=test_vxlan skbaddr=0xffff93ab0d479f00 len=8440  (3)

[...]

  # netperf -H 10.55.10.4 -t TCP_STREAM -l 20
  MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.55.10.4 () port 0 AF_INET : demo
  Recv   Send    Send
  Socket Socket  Message  Elapsed
  Size   Size    Size     Time     Throughput
  bytes  bytes   bytes    secs.    10^6bits/sec

87380 16384 16384 20.01 24576.53

---
 net/ipv4/udp_offload.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -254,7 +254,7 @@ struct sk_buff **udp_gro_receive(struct
 	struct sock *sk;
 
 	if (NAPI_GRO_CB(skb)->encap_mark ||
-	    (skb->ip_summed != CHECKSUM_PARTIAL &&
+	    (uh->check && skb->ip_summed != CHECKSUM_PARTIAL &&
 	     NAPI_GRO_CB(skb)->csum_cnt == 0 &&
 	     !NAPI_GRO_CB(skb)->csum_valid))
 		goto out;

From: Greg Kroah-Hartman <[email protected]>

From: Maxim Mikityanskiy <[email protected]>

commit e78b2915517e8fcadb1bc130ad6aeac7099e510c upstream.

Introduce a new optional header_ops callback called parse_protocol and a wrapper function dev_parse_header_protocol, similar to dev_parse_header.

The new callback's purpose is to extract the protocol number from the L2 header, the format of which is known to the driver, but not to the upper layers of the stack.

---
 include/linux/netdevice.h |   10 ++++++++++
 1 file changed, 10 insertions(+)

@@ -272,6 +272,7 @@ struct header_ops {
 				const struct net_device *dev,
 				const unsigned char *haddr);
 	bool	(*validate)(const char *ll_header, unsigned int len);
+	__be16	(*parse_protocol)(const struct sk_buff *skb);
 };
 
 /* These flag bits are private to the generic network queueing

@@ -2731,6 +2732,15 @@ static inline int dev_parse_header(const
 	return dev->header_ops->parse(skb, haddr);
 }
 
+static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
+{
+	const struct net_device *dev = skb->dev;
+
+	if (!dev->header_ops || !dev->header_ops->parse_protocol)
+		return 0;
+	return dev->header_ops->parse_protocol(skb);
+}
+
 /* ll_header must have at least hard_header_len allocated */
 static inline bool dev_validate_header(const struct net_device *dev,
 				       char *ll_header, int len)

From: Greg Kroah-Hartman <[email protected]>

From: Balazs Nemeth <[email protected]>

commit 924a9bc362a5223cd448ca08c3dde21235adc310 upstream.

For gso packets, virtio_net_hdr_set_proto sets the protocol (if it isn't set) based on the type in the virtio net hdr, but the skb could contain anything since it could come from packet_snd through a raw socket. If there is a mismatch between what virtio_net_hdr_set_proto sets and the actual protocol, then the skb could be handled incorrectly later on.

An example where this poses an issue is with the subsequent call to skb_flow_dissect_flow_keys_basic which relies on skb->protocol being set correctly. A specially crafted packet could fool skb_flow_dissect_flow_keys_basic preventing EINVAL to be returned.

Avoid blindly trusting the information provided by the virtio net header by checking that the protocol in the packet actually matches the protocol set by virtio_net_hdr_set_proto. Note that since the protocol is only checked if skb->dev implements header_ops->parse_protocol, packets from devices without the implementation are not checked at this stage.

---
 include/linux/virtio_net.h |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

@@ -79,8 +79,13 @@ static inline int virtio_net_hdr_to_skb(
 		if (gso_type && skb->network_header) {
 			struct flow_keys keys;
 
-			if (!skb->protocol)
+			if (!skb->protocol) {
+				__be16 protocol = dev_parse_header_protocol(skb);
+
 				virtio_net_hdr_set_proto(skb, hdr);
+				if (protocol && protocol != skb->protocol)
+					return -EINVAL;
+			}
 retry:
 			if (!skb_flow_dissect_flow_keys(skb, &keys, 0)) {
 				/* UFO does not specify ipv4 or 6: try both */

From: Greg Kroah-Hartman <[email protected]>

From: Balazs Nemeth <[email protected]>

commit d348ede32e99d3a04863e9f9b28d224456118c27 upstream.

A packet with skb_inner_network_header(skb) == skb_network_header(skb) and ETH_P_MPLS_UC will prevent mpls_gso_segment from pulling any headers from the packet. Subsequently, the call to skb_mac_gso_segment will again call mpls_gso_segment with the same packet leading to an infinite loop. In addition, ensure that the header length is a multiple of four, which should hold irrespective of the number of stacked labels.

---
 net/mpls/mpls_gso.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -18,6 +18,7 @@
 #include <linux/netdev_features.h>
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>
+#include <net/mpls.h>
 
 static struct sk_buff *mpls_gso_segment(struct sk_buff *skb,
 				       netdev_features_t features)

@@ -31,6 +32,8 @@ static struct sk_buff *mpls_gso_segment(
 
 	skb_reset_network_header(skb);
 	mpls_hlen = skb_inner_network_header(skb) - skb_network_header(skb);
+	if (unlikely(!mpls_hlen || mpls_hlen % MPLS_HLEN))
+		goto out;
 	if (unlikely(!pskb_may_pull(skb, mpls_hlen)))
 		goto out;
 

From: Greg Kroah-Hartman <[email protected]>

From: Oleksij Rempel <[email protected]>

commit e940e0895a82c6fbaa259f2615eb52b57ee91a7e upstream.

There are two ref count variables controlling the free()ing of a socket:
- struct sock::sk_refcnt - which is changed by sock_hold()/sock_put()
- struct sock::sk_wmem_alloc - which accounts the memory allocated by the skbs in the send path.

In case there are still TX skbs on the fly and the socket() is closed, the struct sock::sk_refcnt reaches 0. In the TX-path the CAN stack clones an "echo" skb, calls sock_hold() on the original socket and references it. This produces the following back trace:

| WARNING: CPU: 0 PID: 280 at lib/refcount.c:25 refcount_warn_saturate+0x114/0x134
| refcount_t: addition on 0; use-after-free.
| Modules linked in: coda_vpu(E) v4l2_jpeg(E) videobuf2_vmalloc(E) imx_vdoa(E)
| CPU: 0 PID: 280 Comm: test_can.sh Tainted: G            E     5.11.0-04577-gf8ff6603c617 #203
| Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
| Backtrace:
| [<80bafea4>] (dump_backtrace) from [<80bb0280>] (show_stack+0x20/0x24) r7:00000000 r6:600f0113 r5:00000000 r4:81441220
| [<80bb0260>] (show_stack) from [<80bb593c>] (dump_stack+0xa0/0xc8)
| [<80bb589c>] (dump_stack) from [<8012b268>] (__warn+0xd4/0x114) r9:00000019 r8:80f4a8c2 r7:83e4150c r6:00000000 r5:00000009 r4:80528f90
| [<8012b194>] (__warn) from [<80bb09c4>] (warn_slowpath_fmt+0x88/0xc8) r9:83f26400 r8:80f4a8d1 r7:00000009 r6:80528f90 r5:00000019 r4:80f4a8c2
| [<80bb0940>] (warn_slowpath_fmt) from [<80528f90>] (refcount_warn_saturate+0x114/0x134) r8:00000000 r7:00000000 r6:82b44000 r5:834e5600 r4:83f4d540
| [<80528e7c>] (refcount_warn_saturate) from [<8079a4c8>] (__refcount_add.constprop.0+0x4c/0x50)
| [<8079a47c>] (__refcount_add.constprop.0) from [<8079a57c>] (can_put_echo_skb+0xb0/0x13c)
| [<8079a4cc>] (can_put_echo_skb) from [<8079ba98>] (flexcan_start_xmit+0x1c4/0x230) r9:00000010 r8:83f48610 r7:0fdc0000 r6:0c080000 r5:82b44000 r4:834e5600
| [<8079b8d4>] (flexcan_start_xmit) from [<80969078>] (netdev_start_xmit+0x44/0x70) r9:814c0ba0 r8:80c8790c r7:00000000 r6:834e5600 r5:82b44000 r4:82ab1f00
| [<80969034>] (netdev_start_xmit) from [<809725a4>] (dev_hard_start_xmit+0x19c/0x318) r9:814c0ba0 r8:00000000 r7:82ab1f00 r6:82b44000 r5:00000000 r4:834e5600
| [<80972408>] (dev_hard_start_xmit) from [<809c6584>] (sch_direct_xmit+0xcc/0x264) r10:834e5600 r9:00000000 r8:00000000 r7:82b44000 r6:82ab1f00 r5:834e5600 r4:83f27400
| [<809c64b8>] (sch_direct_xmit) from [<809c6c0c>] (__qdisc_run+0x4f0/0x534)

To fix this problem, only set skb ownership to sockets which have still a ref count > 0.

---
 include/linux/can/skb.h |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

@@ -49,8 +49,12 @@ static inline void can_skb_reserve(struc
 
 static inline void can_skb_set_owner(struct sk_buff *skb, struct sock *sk)
 {
-	if (sk) {
-		sock_hold(sk);
+	/* If the socket has already been closed by user space, the
+	 * refcount may already be 0 (and the socket will be freed
+	 * after the last TX skb has been freed). So only increase
+	 * socket refcount if the refcount is > 0.
+	 */
+	if (sk && refcount_inc_not_zero(&sk->sk_refcnt)) {
 		skb->destructor = sock_efree;
 		skb->sk = sk;
 	}

From: Greg Kroah-Hartman <[email protected]>

From: Joakim Zhang <[email protected]>

commit 449052cfebf624b670faa040245d3feed770d22f upstream.

Assert HALT bit to enter freeze mode, there is a premise that FRZ bit is asserted. This patch asserts FRZ bit in flexcan_chip_freeze, although the reset value is 1b'1. This is a prepare patch, later patch will invoke flexcan_chip_freeze() to enter freeze mode, which polling freeze mode acknowledge.

---
 drivers/net/can/flexcan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -417,7 +417,7 @@ static int flexcan_chip_freeze(struct fl
 	u32 reg;
 
 	reg = flexcan_read(&regs->mcr);
-	reg |= FLEXCAN_MCR_HALT;
+	reg |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT;
 	flexcan_write(reg, &regs->mcr);
 
 	while (timeout-- && !(flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))

From: Greg Kroah-Hartman <[email protected]>

From: Joakim Zhang <[email protected]>

commit ec15e27cc8904605846a354bb1f808ea1432f853 upstream.

RX FIFO enable failed could happen when do system reboot stress test:

[    0.303958] flexcan 5a8d0000.can: 5a8d0000.can supply xceiver not found, using dummy regulator
[    0.304281] flexcan 5a8d0000.can (unnamed net_device) (uninitialized): Could not enable RX FIFO, unsupported core
[    0.314640] flexcan 5a8d0000.can: registering netdev failed
[    0.320728] flexcan 5a8e0000.can: 5a8e0000.can supply xceiver not found, using dummy regulator
[    0.320991] flexcan 5a8e0000.can (unnamed net_device) (uninitialized): Could not enable RX FIFO, unsupported core
[    0.331360] flexcan 5a8e0000.can: registering netdev failed
[    0.337444] flexcan 5a8f0000.can: 5a8f0000.can supply xceiver not found, using dummy regulator
[    0.337716] flexcan 5a8f0000.can (unnamed net_device) (uninitialized): Could not enable RX FIFO, unsupported core
[    0.348117] flexcan 5a8f0000.can: registering netdev failed

RX FIFO should be enabled after the FRZ/HALT are valid. But the current code enable RX FIFO and FRZ/HALT at the same time.

---
 drivers/net/can/flexcan.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

@@ -1217,10 +1217,14 @@ static int register_flexcandev(struct ne
 	if (err)
 		goto out_chip_disable;
 
-	/* set freeze, halt and activate FIFO, restrict register access */
+	/* set freeze, halt */
+	err = flexcan_chip_freeze(priv);
+	if (err)
+		goto out_chip_disable;
+
+	/* activate FIFO, restrict register access */
 	reg = flexcan_read(&regs->mcr);
-	reg |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT |
-		FLEXCAN_MCR_FEN | FLEXCAN_MCR_SUPV;
+	reg |=  FLEXCAN_MCR_FEN | FLEXCAN_MCR_SUPV;
 	flexcan_write(reg, &regs->mcr);
 
 	/* Currently we only support newer versions of this core

From: Greg Kroah-Hartman <[email protected]>

From: Vasily Averin <[email protected]>

commit 8e24edddad152b998b37a7f583175137ed2e04a5 upstream.

nested target/match_revfn() calls work with xt[NFPROTO_UNSPEC] lists without taking xt[NFPROTO_UNSPEC].mutex. This can race with module unload and cause host to crash:

general protection fault: 0000 [#1]
Modules linked in: ... [last unloaded: xt_cluster]
CPU: 0 PID: 542455 Comm: iptables
RIP: 0010:[<ffffffff8ffbd518>]  [<ffffffff8ffbd518>] strcmp+0x18/0x40
RDX: 0000000000000003 RSI: ffff9a5a5d9abe10 RDI: dead000000000111
R13: ffff9a5a5d9abe10 R14: ffff9a5a5d9abd8c R15: dead000000000100
(VvS: %R15 -- &xt_match,  %RDI -- &xt_match.name,
xt_cluster unregister match in xt[NFPROTO_UNSPEC].match list)
Call Trace:
 [<ffffffff902ccf44>] match_revfn+0x54/0xc0
 [<ffffffff902ccf9f>] match_revfn+0xaf/0xc0
 [<ffffffff902cd01e>] xt_find_revision+0x6e/0xf0
 [<ffffffffc05a5be0>] do_ipt_get_ctl+0x100/0x420 [ip_tables]
 [<ffffffff902cc6bf>] nf_getsockopt+0x4f/0x70
 [<ffffffff902dd99e>] ip_getsockopt+0xde/0x100
 [<ffffffff903039b5>] raw_getsockopt+0x25/0x50
 [<ffffffff9026c5da>] sock_common_getsockopt+0x1a/0x20
 [<ffffffff9026b89d>] SyS_getsockopt+0x7d/0xf0
 [<ffffffff903cbf92>] system_call_fastpath+0x25/0x2a

---
 net/netfilter/x_tables.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

@@ -329,6 +329,7 @@ static int match_revfn(u8 af, const char
 	const struct xt_match *m;
 	int have_rev = 0;
 
+	mutex_lock(&xt[af].mutex);
 	list_for_each_entry(m, &xt[af].match, list) {
 		if (strcmp(m->name, name) == 0) {
 			if (m->revision > *bestp)

@@ -337,6 +338,7 @@ static int match_revfn(u8 af, const char
 				have_rev = 1;
 		}
 	}
+	mutex_unlock(&xt[af].mutex);
 
 	if (af != NFPROTO_UNSPEC && !have_rev)
 		return match_revfn(NFPROTO_UNSPEC, name, revision, bestp);

@@ -349,6 +351,7 @@ static int target_revfn(u8 af, const cha
 	const struct xt_target *t;
 	int have_rev = 0;
 
+	mutex_lock(&xt[af].mutex);
 	list_for_each_entry(t, &xt[af].target, list) {
 		if (strcmp(t->name, name) == 0) {
 			if (t->revision > *bestp)

@@ -357,6 +360,7 @@ static int target_revfn(u8 af, const cha
 				have_rev = 1;
 		}
 	}
+	mutex_unlock(&xt[af].mutex);
 
 	if (af != NFPROTO_UNSPEC && !have_rev)
 		return target_revfn(NFPROTO_UNSPEC, name, revision, bestp);

@@ -370,12 +374,10 @@ int xt_find_revision(u8 af, const char *
 {
 	int have_rev, best = -1;
 
-	mutex_lock(&xt[af].mutex);
 	if (target == 1)
 		have_rev = target_revfn(af, name, revision, &best);
 	else
 		have_rev = match_revfn(af, name, revision, &best);
-	mutex_unlock(&xt[af].mutex);
 
 	/* Nothing at all?  Return 0 to try loading module. */
 	if (best == -1) {

From: Greg Kroah-Hartman <[email protected]>

From: Paulo Alcantara <[email protected]>

commit 14302ee3301b3a77b331cc14efb95bf7184c73cc upstream.

In cifs_statfs(), if server->ops->queryfs is not NULL, then we should use its return value rather than always returning 0. Instead, use rc variable as it is properly set to 0 in case there is no server->ops->queryfs.

---
 fs/cifs/cifsfs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -214,7 +214,7 @@ cifs_statfs(struct dentry *dentry, struc
 		rc = server->ops->queryfs(xid, tcon, buf);
 
 	free_xid(xid);
-	return 0;
+	return rc;
 }
 
 static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)

From: Greg Kroah-Hartman <[email protected]>

From: Joe Lawrence <[email protected]>

commit 9c8e2f6d3d361439cc6744a094f1c15681b55269 upstream.

When building with -ffunction-sections, the compiler will place each function into its own ELF section, prefixed with ".text". For example, a simple test module with functions test_module_do_work() and test_module_wq_func():

  % objdump --section-headers test_module.o | awk '/\.text/{print $2}'
  .text
  .text.test_module_do_work
  .text.test_module_wq_func
  .init.text
  .exit.text

Adjust the recordmcount scripts to look for ".text" as a section name prefix. This will ensure that those functions will be included in the __mcount_loc relocations:

  % objdump --reloc --section __mcount_loc test_module.o
  OFFSET           TYPE              VALUE
  0000000000000000 R_X86_64_64       .text.test_module_do_work
  0000000000000008 R_X86_64_64       .text.test_module_wq_func
  0000000000000010 R_X86_64_64       .init.text

---
 scripts/recordmcount.c  |    2 +-
 scripts/recordmcount.pl |   13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

@@ -415,7 +415,7 @@ static uint32_t (*w2)(uint16_t);
 static int
 is_mcounted_section_name(char const *const txtname)
 {
-	return strcmp(".text",           txtname) == 0 ||
+	return strncmp(".text",          txtname, 5) == 0 ||
 		strcmp(".init.text",     txtname) == 0 ||
 		strcmp(".ref.text",      txtname) == 0 ||
 		strcmp(".sched.text",    txtname) == 0 ||

@@ -142,6 +142,11 @@ my %text_sections = (
      ".text.unlikely" => 1,
 );
 
+# Acceptable section-prefixes to record.
+my %text_section_prefixes = (
+     ".text." => 1,
+);
+
 # Note: we are nice to C-programmers here, thus we skip the '||='-idiom.
 $objdump = 'objdump' if (!$objdump);
 $objcopy = 'objcopy' if (!$objcopy);

@@ -507,6 +512,14 @@ while (<IN>) {
 
 	# Only record text sections that we know are safe
 	$read_function = defined($text_sections{$1});
+	if (!$read_function) {
+	    foreach my $prefix (keys %text_section_prefixes) {
+	        if (substr($1, 0, length $prefix) eq $prefix) {
+	            $read_function = 1;
+	            last;
+	        }
+	    }
+	}
 	# print out any recorded offsets
 	update_funcs();
 

From: Greg Kroah-Hartman <[email protected]>

From: Linus Torvalds <[email protected]>

commit 9b1ea29bc0d7b94d420f96a0f4121403efc3dd85 upstream.

This reverts commit 8ff60eb052eeba95cfb3efe16b08c9199f8121cf.

The kernel test robot reports a huge performance regression due to the commit, and the reason seems fairly straightforward: when there is contention on the page list (which is what causes acquire_slab() to fail), we do _not_ want to just loop and try again, because that will transfer the contention to the 'n->list_lock' spinlock we hold, and just make things even worse.

This is admittedly likely a problem only on big machines - the kernel test robot report comes from a 96-thread dual socket Intel Xeon Gold 6252 setup, but the regression there really is quite noticeable:

-47.9% regression of stress-ng.rawpkt.ops_per_sec

and the commit that was marked as being fixed (7ced37197196: "slub:
Acquire_slab() avoid loop") actually did the loop exit early very intentionally (the hint being that "avoid loop" part of that commit message), exactly to avoid this issue.

The correct thing to do may be to pick some kind of reasonable middle
ground: instead of breaking out of the loop on the very first sign of contention, or trying over and over and over again, the right thing may be to re-try _once_, and then give up on the second failure (or pick your favorite value for "once"..).

---
 mm/slub.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -1846,7 +1846,7 @@ static void *get_partial_node(struct kme
 
 		t = acquire_slab(s, n, page, object == NULL, &objects);
 		if (!t)
-			continue; /* cmpxchg raced */
+			break;
 
 		available += objects;
 		if (!object) {

From: Greg Kroah-Hartman <[email protected]>

From: Sergey Shtylyov <[email protected]>

commit 8c91bc3d44dfef8284af384877fbe61117e8b7d1 upstream.

According to the SH7710, SH7712, SH7713 Group User's Manual: Hardware, Rev. 3.00, the TRSCER register actually has only bit 7 valid (and named differently), with all the other bits reserved. Apparently, this was not the case with some early revisions of the manual as we have the other bits declared (and set) in the original driver. Follow the suit and add the explicit sh_eth_cpu_data::trscer_err_mask initializer for SH771x...

---
 drivers/net/ethernet/renesas/sh_eth.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -935,6 +935,9 @@ static struct sh_eth_cpu_data sh771x_dat
 			  EESIPR_CEEFIP | EESIPR_CELFIP |
 			  EESIPR_RRFIP | EESIPR_RTLFIP | EESIPR_RTSFIP |
 			  EESIPR_PREIP | EESIPR_CERFIP,
+
+	.trscer_err_mask = DESC_I_RINT8,
+
 	.tsu		= 1,
 	.dual_port	= 1,
 };

From: Greg Kroah-Hartman <[email protected]>

From: Kevin(Yudong) Yang <[email protected]>

commit 00ff801bb8ce6711e919af4530b6ffa14a22390a upstream.

This patch fixes a bug that the moderation config will not be applied when calling mlx4_en_reset_config. For example, when turning on rx timestamping, mlx4_en_reset_config() will be called, causing the NIC to forget previous moderation config.

This fix is in phase with a previous fix:
commit 79c54b6bbf06 ("net/mlx4_en: Fix TX moderation info loss after set_ringparam is called")

Tested: Before this patch, on a host with NIC using mlx4, run netserver and stream TCP to the host at full utilization.

$ sar -I SUM 1
                 INTR    intr/s
14:03:56          sum  48758.00

After rx hwtstamp is enabled:

$ sar -I SUM 1
14:10:38          sum 317771.00
We see the moderation is not working properly and issued 7x more
interrupts.

After the patch, and turned on rx hwtstamp, the rate of interrupts is as expected:

$ sar -I SUM 1
14:52:11          sum  49332.00

---
 drivers/net/ethernet/mellanox/mlx4/en_ethtool.c |    2 +-
 drivers/net/ethernet/mellanox/mlx4/en_netdev.c  |    2 ++
 drivers/net/ethernet/mellanox/mlx4/mlx4_en.h    |    1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

@@ -47,7 +47,7 @@
 #define EN_ETHTOOL_SHORT_MASK cpu_to_be16(0xffff)
 #define EN_ETHTOOL_WORD_MASK  cpu_to_be32(0xffffffff)
 
-static int mlx4_en_moderation_update(struct mlx4_en_priv *priv)
+int mlx4_en_moderation_update(struct mlx4_en_priv *priv)
 {
 	int i, t;
 	int err = 0;

@@ -3673,6 +3673,8 @@ int mlx4_en_reset_config(struct net_devi
 			en_err(priv, "Failed starting port\n");
 	}
 
+	if (!err)
+		err = mlx4_en_moderation_update(priv);
 out:
 	mutex_unlock(&mdev->state_lock);
 	kfree(tmp);

@@ -789,6 +789,7 @@ void mlx4_en_ptp_overflow_check(struct m
 #define DEV_FEATURE_CHANGED(dev, new_features, feature) \
 	((dev->features & feature) ^ (new_features & feature))
 
+int mlx4_en_moderation_update(struct mlx4_en_priv *priv);
 int mlx4_en_reset_config(struct net_device *dev,
 			 struct hwtstamp_config ts_config,
 			 netdev_features_t new_features);

From: Greg Kroah-Hartman <[email protected]>

From: Ong Boon Leong <[email protected]>

commit 879c348c35bb5fb758dd881d8a97409c1862dae8 upstream.

We introduce dwmac410_dma_init_channel() here for both EQoS v4.10 and above which use different DMA_CH(n)_Interrupt_Enable bit definitions for NIE and AIE.

---
 drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c |   19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

@@ -115,6 +115,23 @@ static void dwmac4_dma_init_channel(void
 	       ioaddr + DMA_CHAN_INTR_ENA(chan));
 }
 
+static void dwmac410_dma_init_channel(void __iomem *ioaddr,
+				      struct stmmac_dma_cfg *dma_cfg, u32 chan)
+{
+	u32 value;
+
+	/* common channel control register config */
+	value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
+	if (dma_cfg->pblx8)
+		value = value | DMA_BUS_MODE_PBL;
+
+	writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
+
+	/* Mask interrupts by writing to CSR7 */
+	writel(DMA_CHAN_INTR_DEFAULT_MASK_4_10,
+	       ioaddr + DMA_CHAN_INTR_ENA(chan));
+}
+
 static void dwmac4_dma_init(void __iomem *ioaddr,
 			    struct stmmac_dma_cfg *dma_cfg,
 			    u32 dma_tx, u32 dma_rx, int atds)

@@ -416,7 +433,7 @@ const struct stmmac_dma_ops dwmac4_dma_o
 const struct stmmac_dma_ops dwmac410_dma_ops = {
 	.reset = dwmac4_dma_reset,
 	.init = dwmac4_dma_init,
-	.init_chan = dwmac4_dma_init_channel,
+	.init_chan = dwmac410_dma_init_channel,
 	.init_rx_chan = dwmac4_dma_init_rx_chan,
 	.init_tx_chan = dwmac4_dma_init_tx_chan,
 	.axi = dwmac4_dma_axi,

From: Greg Kroah-Hartman <[email protected]>

From: Maximilian Heyne <[email protected]>

commit bfc2560563586372212b0a8aeca7428975fa91fe upstream.

This is a follow up of commit ea3274695353 ("net: sched: avoid duplicates in qdisc dump") which has fixed the issue only for the qdisc dump.

The duplicate printing also occurs when dumping the classes via
tc class show dev eth0

---
 net/sched/sch_api.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

@@ -1904,7 +1904,7 @@ static int tc_dump_tclass_qdisc(struct Q
 
 static int tc_dump_tclass_root(struct Qdisc *root, struct sk_buff *skb,
 			       struct tcmsg *tcm, struct netlink_callback *cb,
-			       int *t_p, int s_t)
+			       int *t_p, int s_t, bool recur)
 {
 	struct Qdisc *q;
 	int b;

@@ -1915,7 +1915,7 @@ static int tc_dump_tclass_root(struct Qd
 	if (tc_dump_tclass_qdisc(root, skb, tcm, cb, t_p, s_t) < 0)
 		return -1;
 
-	if (!qdisc_dev(root))
+	if (!qdisc_dev(root) || !recur)
 		return 0;
 
 	if (tcm->tcm_parent) {

@@ -1950,13 +1950,13 @@ static int tc_dump_tclass(struct sk_buff
 	s_t = cb->args[0];
 	t = 0;
 
-	if (tc_dump_tclass_root(dev->qdisc, skb, tcm, cb, &t, s_t) < 0)
+	if (tc_dump_tclass_root(dev->qdisc, skb, tcm, cb, &t, s_t, true) < 0)
 		goto done;
 
 	dev_queue = dev_ingress_queue(dev);
 	if (dev_queue &&
 	    tc_dump_tclass_root(dev_queue->qdisc_sleeping, skb, tcm, cb,
-				&t, s_t) < 0)
+				&t, s_t, false) < 0)
 		goto done;
 
 done:

From: Greg Kroah-Hartman <[email protected]>

From: Daniele Palmas <[email protected]>

commit 6c59cff38e66584ae3ac6c2f0cbd8d039c710ba7 upstream.

There's no reason for preventing the creation and removal of qmimux network interfaces when the underlying interface is up.

This makes qmi_wwan mux implementation more similar to the rmnet one, simplifying userspace management of the same logical interfaces.

---
 drivers/net/usb/qmi_wwan.c |   14 --------------
 1 file changed, 14 deletions(-)

@@ -378,13 +378,6 @@ static ssize_t add_mux_store(struct devi
 		goto err;
 	}
 
-	/* we don't want to modify a running netdev */
-	if (netif_running(dev->net)) {
-		netdev_err(dev->net, "Cannot change a running device\n");
-		ret = -EBUSY;
-		goto err;
-	}
-
 	ret = qmimux_register_device(dev->net, mux_id);
 	if (!ret) {
 		info->flags |= QMI_WWAN_FLAG_MUX;

@@ -414,13 +407,6 @@ static ssize_t del_mux_store(struct devi
 	if (!rtnl_trylock())
 		return restart_syscall();
 
-	/* we don't want to modify a running netdev */
-	if (netif_running(dev->net)) {
-		netdev_err(dev->net, "Cannot change a running device\n");
-		ret = -EBUSY;
-		goto err;
-	}
-
 	del_dev = qmimux_find_dev(dev, mux_id);
 	if (!del_dev) {
 		netdev_err(dev->net, "mux_id not present\n");

From: Greg Kroah-Hartman <[email protected]>

From: Paul Moore <[email protected]>

commit ad5d07f4a9cd671233ae20983848874731102c08 upstream.

The current CIPSO and CALIPSO refcounting scheme for the DOI definitions is a bit flawed in that we:

1. Don't correctly match gets/puts in netlbl_cipsov4_list().
2. Decrement the refcount on each attempt to remove the DOI from the DOI list, only removing it from the list once the refcount drops to zero.

This patch fixes these problems by adding the missing "puts" to netlbl_cipsov4_list() and introduces a more conventional, i.e. not-buggy, refcounting mechanism to the DOI definitions. Upon the addition of a DOI to the DOI list, it is initialized with a refcount of one, removing a DOI from the list removes it from the list and drops the refcount by one; "gets" and "puts" behave as expected with respect to refcounts, increasing and decreasing the DOI's refcount by one.

---
 net/ipv4/cipso_ipv4.c            |   11 +----------
 net/ipv6/calipso.c               |   14 +++++---------
 net/netlabel/netlabel_cipso_v4.c |    3 +++
 3 files changed, 9 insertions(+), 19 deletions(-)

@@ -533,16 +533,10 @@ int cipso_v4_doi_remove(u32 doi, struct
 		ret_val = -ENOENT;
 		goto doi_remove_return;
 	}
-	if (!refcount_dec_and_test(&doi_def->refcount)) {
-		spin_unlock(&cipso_v4_doi_list_lock);
-		ret_val = -EBUSY;
-		goto doi_remove_return;
-	}
 	list_del_rcu(&doi_def->list);
 	spin_unlock(&cipso_v4_doi_list_lock);
 
-	cipso_v4_cache_invalidate();
-	call_rcu(&doi_def->rcu, cipso_v4_doi_free_rcu);
+	cipso_v4_doi_putdef(doi_def);
 	ret_val = 0;
 
 doi_remove_return:

@@ -599,9 +593,6 @@ void cipso_v4_doi_putdef(struct cipso_v4
 
 	if (!refcount_dec_and_test(&doi_def->refcount))
 		return;
-	spin_lock(&cipso_v4_doi_list_lock);
-	list_del_rcu(&doi_def->list);
-	spin_unlock(&cipso_v4_doi_list_lock);
 
 	cipso_v4_cache_invalidate();
 	call_rcu(&doi_def->rcu, cipso_v4_doi_free_rcu);

@@ -97,6 +97,9 @@ struct calipso_map_cache_entry {
 
 static struct calipso_map_cache_bkt *calipso_cache;
 
+static void calipso_cache_invalidate(void);
+static void calipso_doi_putdef(struct calipso_doi *doi_def);
+
 /* Label Mapping Cache Functions
  */
 

@@ -458,15 +461,10 @@ static int calipso_doi_remove(u32 doi, s
 		ret_val = -ENOENT;
 		goto doi_remove_return;
 	}
-	if (!refcount_dec_and_test(&doi_def->refcount)) {
-		spin_unlock(&calipso_doi_list_lock);
-		ret_val = -EBUSY;
-		goto doi_remove_return;
-	}
 	list_del_rcu(&doi_def->list);
 	spin_unlock(&calipso_doi_list_lock);
 
-	call_rcu(&doi_def->rcu, calipso_doi_free_rcu);
+	calipso_doi_putdef(doi_def);
 	ret_val = 0;
 
 doi_remove_return:

@@ -522,10 +520,8 @@ static void calipso_doi_putdef(struct ca
 
 	if (!refcount_dec_and_test(&doi_def->refcount))
 		return;
-	spin_lock(&calipso_doi_list_lock);
-	list_del_rcu(&doi_def->list);
-	spin_unlock(&calipso_doi_list_lock);
 
+	calipso_cache_invalidate();
 	call_rcu(&doi_def->rcu, calipso_doi_free_rcu);
 }
 

@@ -581,6 +581,7 @@ list_start:
 
 		break;
 	}
+	cipso_v4_doi_putdef(doi_def);
 	rcu_read_unlock();
 
 	genlmsg_end(ans_skb, data);

@@ -589,12 +590,14 @@ list_start:
 list_retry:
 	/* XXX - this limit is a guesstimate */
 	if (nlsze_mult < 4) {
+		cipso_v4_doi_putdef(doi_def);
 		rcu_read_unlock();
 		kfree_skb(ans_skb);
 		nlsze_mult *= 2;
 		goto list_start;
 	}
 list_failure_lock:
+	cipso_v4_doi_putdef(doi_def);
 	rcu_read_unlock();
 list_failure:
 	kfree_skb(ans_skb);

From: Greg Kroah-Hartman <[email protected]>

From: Xie He <[email protected]>

commit f7d9d4854519fdf4d45c70a4d953438cd88e7e58 upstream.

For the devices in this driver, the default qdisc is "noqueue", because their "tx_queue_len" is 0.

In function "__dev_queue_xmit" in "net/core/dev.c", devices with the "noqueue" qdisc are specially handled. Packets are transmitted without being queued after a "dev->flags & IFF_UP" check. However, it's possible that even if this check succeeds, "ops->ndo_stop" may still have already been called. This is because in "__dev_close_many", "ops->ndo_stop" is called before clearing the "IFF_UP" flag.

If we call "netif_stop_queue" in "ops->ndo_stop", then it's possible in "__dev_queue_xmit", it sees the "IFF_UP" flag is present, and then it checks "netif_xmit_stopped" and finds that the queue is already stopped. In this case, it will complain that:
"Virtual device ... asks to queue packet!"

To prevent "__dev_queue_xmit" from generating this complaint, we should not call "netif_stop_queue" in "ops->ndo_stop".

We also don't need to call "netif_start_queue" in "ops->ndo_open", because after a netdev is allocated and registered, the "__QUEUE_STATE_DRV_XOFF" flag is initially not set, so there is no need to call "netif_start_queue" to clear it.

---
 drivers/net/wan/lapbether.c |    3 ---
 1 file changed, 3 deletions(-)

@@ -286,7 +286,6 @@ static int lapbeth_open(struct net_devic
 		return -ENODEV;
 	}
 
-	netif_start_queue(dev);
 	return 0;
 }
 

@@ -294,8 +293,6 @@ static int lapbeth_close(struct net_devi
 {
 	int err;
 
-	netif_stop_queue(dev);
-
 	if ((err = lapb_unregister(dev)) != LAPB_OK)
 		pr_err("lapb_unregister error: %d\n", err);
 

From: Greg Kroah-Hartman <[email protected]>

From: Paul Cercueil <[email protected]>

commit ac88c531a5b38877eba2365a3f28f0c8b513dc33 upstream.

When the probe fails or requests to be defered, we must disable the regulator that was previously enabled.

---
 drivers/net/ethernet/davicom/dm9000.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

@@ -1460,7 +1460,7 @@ dm9000_probe(struct platform_device *pde
 		if (ret) {
 			dev_err(dev, "failed to request reset gpio %d: %d\n",
 				reset_gpios, ret);
-			return -ENODEV;
+			goto out_regulator_disable;
 		}
 
 		/* According to manual PWRST# Low Period Min 1ms */

@@ -1472,8 +1472,10 @@ dm9000_probe(struct platform_device *pde
 
 	if (!pdata) {
 		pdata = dm9000_parse_dt(&pdev->dev);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
+		if (IS_ERR(pdata)) {
+			ret = PTR_ERR(pdata);
+			goto out_regulator_disable;
+		}
 	}
 
 	/* Init network device */

@@ -1716,6 +1718,10 @@ out:
 	dm9000_release_board(pdev, db);
 	free_netdev(ndev);
 
+out_regulator_disable:
+	if (!IS_ERR(power))
+		regulator_disable(power);
+
 	return ret;
 }
 

From: Greg Kroah-Hartman <[email protected]>

From: Paul Cercueil <[email protected]>

commit cf9e60aa69ae6c40d3e3e4c94dd6c8de31674e9b upstream.

We must disable the regulator that was enabled in the probe function.

---
 drivers/net/ethernet/davicom/dm9000.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

@@ -143,6 +143,8 @@ struct board_info {
 	u32		wake_state;
 
 	int		ip_summed;
+
+	struct regulator *power_supply;
 };
 
 /* debug code */

@@ -1492,6 +1494,8 @@ dm9000_probe(struct platform_device *pde
 
 	db->dev = &pdev->dev;
 	db->ndev = ndev;
+	if (!IS_ERR(power))
+		db->power_supply = power;
 
 	spin_lock_init(&db->lock);
 	mutex_init(&db->addr_lock);

@@ -1781,10 +1785,13 @@ static int
 dm9000_drv_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct board_info *dm = to_dm9000_board(ndev);
 
 	unregister_netdev(ndev);
-	dm9000_release_board(pdev, netdev_priv(ndev));
+	dm9000_release_board(pdev, dm);
 	free_netdev(ndev);		/* free device structure */
+	if (dm->power_supply)
+		regulator_disable(dm->power_supply);
 
 	dev_dbg(&pdev->dev, "released and freed device\n");
 	return 0;

From: Greg Kroah-Hartman <[email protected]>

From: Joakim Zhang <[email protected]>

commit a3e860a83397bf761ec1128a3f0ba186445992c6 upstream.

If clear GMAC_CONFIG_TE bit, it would stop all tx channels, but users may only want to stop specific tx channel.

---
 drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c |    4 ----
 1 file changed, 4 deletions(-)

@@ -63,10 +63,6 @@ void dwmac4_dma_stop_tx(void __iomem *io
 
 	value &= ~DMA_CONTROL_ST;
 	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(chan));
-
-	value = readl(ioaddr + GMAC_CONFIG);
-	value &= ~GMAC_CONFIG_TE;
-	writel(value, ioaddr + GMAC_CONFIG);
 }
 
 void dwmac4_dma_start_rx(void __iomem *ioaddr, u32 chan)

From: Greg Kroah-Hartman <[email protected]>

From: Ian Rogers <[email protected]>

commit 137a5258939aca56558f3a23eb229b9c4b293917 upstream.

Issue detected by address sanitizer.

---
 tools/perf/util/trace-event-read.c |    1 +
 1 file changed, 1 insertion(+)

@@ -382,6 +382,7 @@ static int read_saved_cmdline(struct pev
 		pr_debug("error reading saved cmdlines\n");
 		goto out;
 	}
+	buf[ret] = '\0';
 
 	parse_saved_cmdline(pevent, buf, size);
 	ret = 0;

From: Greg Kroah-Hartman <[email protected]>

From: Wang Qing <[email protected]>

commit 51c44babdc19aaf882e1213325a0ba291573308f upstream.

The copy_to_user() function returns the number of bytes remaining to be copied, but we want to return -EFAULT if the copy doesn't complete.

---
 drivers/s390/cio/vfio_ccw_ops.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -341,7 +341,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struc
 		if (ret)
 			return ret;
 
-		return copy_to_user((void __user *)arg, &info, minsz);
+		return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0;
 	}
 	case VFIO_DEVICE_GET_REGION_INFO:
 	{

@@ -362,7 +362,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struc
 		if (ret)
 			return ret;
 
-		return copy_to_user((void __user *)arg, &info, minsz);
+		return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0;
 	}
 	case VFIO_DEVICE_GET_IRQ_INFO:
 	{

From: Greg Kroah-Hartman <[email protected]>

From: Daniel Vetter <[email protected]>

commit de066e116306baf3a6a62691ac63cfc0b1dabddb upstream.

Some of them have gaps, or fields we don't clear. Native ioctl code does full copies plus zero-extends on size mismatch, so nothing can leak. But compat is more hand-rolled so need to be careful.

None of these matter for performance, so just memset.

Also I didn't fix up the CONFIG_DRM_LEGACY or CONFIG_DRM_AGP ioctl, those are security holes anyway.

---
 drivers/gpu/drm/drm_ioc32.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

@@ -96,6 +96,8 @@ static int compat_drm_version(struct fil
 	if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
 		return -EFAULT;
 
+	memset(&v, 0, sizeof(v));
+
 	v = (struct drm_version) {
 		.name_len = v32.name_len,
 		.name = compat_ptr(v32.name),

@@ -134,6 +136,9 @@ static int compat_drm_getunique(struct f
 
 	if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 		return -EFAULT;
+
+	memset(&uq, 0, sizeof(uq));
+
 	uq = (struct drm_unique){
 		.unique_len = uq32.unique_len,
 		.unique = compat_ptr(uq32.unique),

@@ -260,6 +265,8 @@ static int compat_drm_getclient(struct f
 	if (copy_from_user(&c32, argp, sizeof(c32)))
 		return -EFAULT;
 
+	memset(&client, 0, sizeof(client));
+
 	client.idx = c32.idx;
 
 	err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED);

@@ -842,6 +849,8 @@ static int compat_drm_wait_vblank(struct
 	if (copy_from_user(&req32, argp, sizeof(req32)))
 		return -EFAULT;
 
+	memset(&req, 0, sizeof(req));
+
 	req.request.type = req32.request.type;
 	req.request.sequence = req32.request.sequence;
 	req.request.signal = req32.request.signal;

@@ -879,6 +888,8 @@ static int compat_drm_mode_addfb2(struct
 	struct drm_mode_fb_cmd2 req64;
 	int err;
 
+	memset(&req64, 0, sizeof(req64));
+
 	if (copy_from_user(&req64, argp,
 			   offsetof(drm_mode_fb_cmd232_t, modifier)))
 		return -EFAULT;

From: Greg Kroah-Hartman <[email protected]>

From: Artem Lapkin <[email protected]>

commit fa0c16caf3d73ab4d2e5d6fa2ef2394dbec91791 upstream.

Problem: random stucks on reboot stage about 1/20 stuck/reboots // debug kernel log

[    4.496660] reboot: kernel restart prepare CMD:(null)
[    4.498114] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown begin
[    4.503949] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown domain 0:VPU...

...STUCK...

Solution: add shutdown function to meson_drm driver // debug kernel log

[    5.231896] reboot: kernel restart prepare CMD:(null)
[    5.246135] [drm:meson_drv_shutdown]
...
[    5.259271] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown begin
[    5.274688] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown domain 0:VPU...
[    5.338331] reboot: Restarting system
[    5.358293] psci: PSCI_0_2_FN_SYSTEM_RESET reboot_mode:0 cmd:(null)

bl31 reboot reason: 0xd
bl31 reboot reason: 0x0
system cmd 1.
...REBOOT...

Tested: on VIM1 VIM2 VIM3 VIM3L khadas sbcs - 1000+ successful reboots and Odroid boards, WeTek Play2 (GXBB)

---
 drivers/gpu/drm/meson/meson_drv.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

@@ -361,6 +361,16 @@ static int meson_probe_remote(struct pla
 	return count;
 }
 
+static void meson_drv_shutdown(struct platform_device *pdev)
+{
+	struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
+	struct drm_device *drm = priv->drm;
+
+	DRM_DEBUG_DRIVER("\n");
+	drm_kms_helper_poll_fini(drm);
+	drm_atomic_helper_shutdown(drm);
+}
+
 static int meson_drv_probe(struct platform_device *pdev)
 {
 	struct component_match *match = NULL;

@@ -405,6 +415,7 @@ MODULE_DEVICE_TABLE(of, dt_match);
 
 static struct platform_driver meson_drm_platform_driver = {
 	.probe      = meson_drv_probe,
+	.shutdown   = meson_drv_shutdown,
 	.driver     = {
 		.name	= "meson-drm",
 		.of_match_table = dt_match,

From: Greg Kroah-Hartman <[email protected]>

From: Eric Farman <[email protected]>

commit d9c48a948d29bcb22f4fe61a81b718ef6de561a0 upstream.

---
 drivers/s390/cio/vfio_ccw_ops.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -383,7 +383,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struc
 		if (info.count == -1)
 			return -EINVAL;
 
-		return copy_to_user((void __user *)arg, &info, minsz);
+		return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0;
 	}
 	case VFIO_DEVICE_SET_IRQS:
 	{

From: Greg Kroah-Hartman <[email protected]>

From: Maxim Mikityanskiy <[email protected]>

commit 8a7e27fd5cd696ba564a3f62cedef7269cfd0723 upstream.

usbtv doesn't support power management, so on system suspend the .disconnect callback of the driver is called. The teardown sequence includes a call to snd_card_free. Its implementation waits until the refcount of the sound card device drops to zero, however, if its file is open, snd_card_file_add takes a reference, which can't be dropped during the suspend, because the userspace processes are already frozen at this point. snd_card_free waits for completion forever, leading to a hang on suspend.

This commit fixes this deadlock condition by replacing snd_card_free with snd_card_free_when_closed, that doesn't wait until all references are released, allowing suspend to progress.

---
 drivers/media/usb/usbtv/usbtv-audio.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -398,7 +398,7 @@ void usbtv_audio_free(struct usbtv *usbt
 	cancel_work_sync(&usbtv->snd_trigger);
 
 	if (usbtv->snd && usbtv->udev) {
-		snd_card_free(usbtv->snd);
+		snd_card_free_when_closed(usbtv->snd);
 		usbtv->snd = NULL;
 	}
 }

From: Greg Kroah-Hartman <[email protected]>

From: Guangbin Huang <[email protected]>

[ Upstream commit d9032dba5a2b2bbf0fdce67c8795300ec9923b43 ]

If phy uses generic driver and autoneg is on, enter command "ethtool -s eth0 speed 50" will not change phy speed actually, but command "ethtool eth0" shows speed is 50Mb/s because phydev->speed has been set to 50 and no update later.

And duplex setting has same problem too.

However, if autoneg is on, phy only changes speed and duplex according to phydev->advertising, but not phydev->speed and phydev->duplex. So in this case, phydev->speed and phydev->duplex don't need to be set in function phy_ethtool_ksettings_set() if autoneg is on.

---
 drivers/net/phy/phy.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

index 7989ae4b8387..e5b86f07f8fc 100644
@@ -335,7 +335,10 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
 
 	phydev->autoneg = autoneg;
 
-	phydev->speed = speed;
+	if (autoneg == AUTONEG_DISABLE) {
+		phydev->speed = speed;
+		phydev->duplex = duplex;
+	}
 
 	phydev->advertising = advertising;
 

@@ -344,8 +347,6 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
 	else
 		phydev->advertising &= ~ADVERTISED_Autoneg;
 
-	phydev->duplex = duplex;
-
 	phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 
 	/* Restart the PHY */

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Steven J. Magnani <[email protected]>

[ Upstream commit 63c9e47a1642fc817654a1bc18a6ec4bbcc0f056 ]

When extending a file, udf_do_extend_file() may enter following empty indirect extent. At the end of udf_do_extend_file() we revert prev_epos to point to the last written extent. However if we end up not adding any further extent in udf_do_extend_file(), the reverting points prev_epos into the header area of the AED and following updates of the extents (in udf_update_extents()) will corrupt the header.

Make sure that we do not follow indirect extent if we are not going to add any more extents so that returning back to the last written extent works correctly.

---
 fs/udf/inode.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

index dd57bd446340..e0e2bc19c929 100644
@@ -540,11 +540,14 @@ static int udf_do_extend_file(struct inode *inode,
 
 		udf_write_aext(inode, last_pos, &last_ext->extLocation,
 				last_ext->extLength, 1);
+
 		/*
-		 * We've rewritten the last extent but there may be empty
-		 * indirect extent after it - enter it.
+		 * We've rewritten the last extent. If we are going to add
+		 * more extents, we may need to enter possible following
+		 * empty indirect extent.
 		 */
-		udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0);
+		if (new_block_bytes || prealloc_len)
+			udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0);
 	}
 
 	/* Managed to do everything necessary? */

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Christophe JAILLET <[email protected]>

[ Upstream commit 0bb7e560f821c7770973a94e346654c4bdccd42c ]

If 'mmc_of_parse()' fails, we must undo the previous 'dma_request_chan()' call.

---
 drivers/mmc/host/mxs-mmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index add1e70195ea..7125687faf76 100644
@@ -659,7 +659,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
 
 	ret = mmc_of_parse(mmc);
 	if (ret)
-		goto out_clk_disable;
+		goto out_free_dma;
 
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
 

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Chaotian Jing <[email protected]>

[ Upstream commit 0354ca6edd464a2cf332f390581977b8699ed081 ]

when get request SW timeout, if CMD/DAT xfer done irq coming right now, then there is race between the msdc_request_timeout work and irq handler, and the host->cmd and host->data may set to NULL in irq handler. also, current flow ensure that only one path can go to msdc_request_done(), so no need check the return value of cancel_delayed_work().

---
 drivers/mmc/host/mtk-sd.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

index 1a5d5c40324b..e51a62cff5ec 100644
@@ -758,13 +758,13 @@ static void msdc_track_cmd_data(struct msdc_host *host,
 static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq)
 {
 	unsigned long flags;
-	bool ret;
 
-	ret = cancel_delayed_work(&host->req_timeout);
-	if (!ret) {
-		/* delay work already running */
-		return;
-	}
+	/*
+	 * No need check the return value of cancel_delayed_work, as only ONE
+	 * path will go here!
+	 */
+	cancel_delayed_work(&host->req_timeout);
+
 	spin_lock_irqsave(&host->lock, flags);
 	host->mrq = NULL;
 	spin_unlock_irqrestore(&host->lock, flags);

@@ -782,7 +782,7 @@ static bool msdc_cmd_done(struct msdc_host *host, int events,
 	bool done = false;
 	bool sbc_error;
 	unsigned long flags;
-	u32 *rsp = cmd->resp;
+	u32 *rsp;
 
 	if (mrq->sbc && cmd == mrq->cmd &&
 	    (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR

@@ -803,6 +803,7 @@ static bool msdc_cmd_done(struct msdc_host *host, int events,
 
 	if (done)
 		return true;
+	rsp = cmd->resp;
 
 	sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask);
 

@@ -984,7 +985,7 @@ static void msdc_data_xfer_next(struct msdc_host *host,
 static bool msdc_data_xfer_done(struct msdc_host *host, u32 events,
 				struct mmc_request *mrq, struct mmc_data *data)
 {
-	struct mmc_command *stop = data->stop;
+	struct mmc_command *stop;
 	unsigned long flags;
 	bool done;
 	unsigned int check_data = events &

@@ -1000,6 +1001,7 @@ static bool msdc_data_xfer_done(struct msdc_host *host, u32 events,
 
 	if (done)
 		return true;
+	stop = data->stop;
 
 	if (check_data || (stop && stop->error)) {
 		dev_dbg(host->dev, "DMA status: 0x%8X\n",

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Nicholas Piggin <[email protected]>

[ Upstream commit 11cb0a25f71818ca7ab4856548ecfd83c169aa4d ]

If an unrecoverable system reset hits in process context, the system does not have to panic. Similar to machine check, call nmi_exit() before die().

---
 arch/powerpc/kernel/traps.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

index 0f1a888c04a8..05c1aabad01c 100644
@@ -360,8 +360,11 @@ void system_reset_exception(struct pt_regs *regs)
 		die("Unrecoverable nested System Reset", regs, SIGABRT);
 #endif
 	/* Must die if the interrupt is not recoverable */
-	if (!(regs->msr & MSR_RI))
+	if (!(regs->msr & MSR_RI)) {
+		/* For the reason explained in die_mce, nmi_exit before die */
+		nmi_exit();
 		die("Unrecoverable System Reset", regs, SIGABRT);
+	}
 
 	if (!nested)
 		nmi_exit();

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Athira Rajeev <[email protected]>

[ Upstream commit d137845c973147a22622cc76c7b0bc16f6206323 ]

While sampling for marked events, currently we record the sample only if the SIAR valid bit of Sampled Instruction Event Register (SIER) is set. SIAR_VALID bit is used for fetching the instruction address from Sampled Instruction Address Register(SIAR). But there are some usecases, where the user is interested only in the PMU stats at each counter overflow and the exact IP of the overflow event is not required. Dropping SIAR invalid samples will fail to record some of the counter overflows in such cases.

Example of such usecase is dumping the PMU stats (event counts) after some regular amount of instructions/events from the userspace (ex: via ptrace). Here counter overflow is indicated to userspace via signal handler, and captured by monitoring and enabling I/O signaling on the event file descriptor. In these cases, we expect to get sample/overflow indication after each specified sample_period.

Perf event attribute will not have PERF_SAMPLE_IP set in the sample_type if exact IP of the overflow event is not requested. So while profiling if SAMPLE_IP is not set, just record the counter overflow irrespective of SIAR_VALID check.

---
 arch/powerpc/perf/core-book3s.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

index 56f16c803590..2669847434b8 100644
@@ -2055,7 +2055,17 @@ static void record_and_restart(struct perf_event *event, unsigned long val,
 			left += period;
 			if (left <= 0)
 				left = period;
-			record = siar_valid(regs);
+
+			/*
+			 * If address is not requested in the sample via
+			 * PERF_SAMPLE_IP, just record that sample irrespective
+			 * of SIAR valid check.
+			 */
+			if (event->attr.sample_type & PERF_SAMPLE_IP)
+				record = siar_valid(regs);
+			else
+				record = 1;
+
 			event->hw.last_period = event->hw.sample_period;
 		}
 		if (left < 0x80000000LL)

@@ -2073,9 +2083,10 @@ static void record_and_restart(struct perf_event *event, unsigned long val,
 	 * MMCR2. Check attr.exclude_kernel and address to drop the sample in
 	 * these cases.
 	 */
-	if (event->attr.exclude_kernel && record)
-		if (is_kernel_addr(mfspr(SPRN_SIAR)))
-			record = 0;
+	if (event->attr.exclude_kernel &&
+	    (event->attr.sample_type & PERF_SAMPLE_IP) &&
+	    is_kernel_addr(mfspr(SPRN_SIAR)))
+		record = 0;
 
 	/*
 	 * Finally record data if requested.

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Martin Kaiser <[email protected]>

[ Upstream commit a93c00e5f975f23592895b7e83f35de2d36b7633 ]

Fix a race where a pending interrupt could be received and the handler called before the handler's data has been setup, by converting to irq_set_chained_handler_and_data().

See also 2cf5a03cb29d ("PCI/keystone: Fix race in installing chained IRQ handler").

Based on the mail discussion, it seems ok to drop the error handling.

---
 drivers/pci/host/pci-xgene-msi.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

index 1f42a202b021..784b3f61199e 100644
@@ -393,13 +393,9 @@ static int xgene_msi_hwirq_alloc(unsigned int cpu)
 		if (!msi_group->gic_irq)
 			continue;
 
-		irq_set_chained_handler(msi_group->gic_irq,
-					xgene_msi_isr);
-		err = irq_set_handler_data(msi_group->gic_irq, msi_group);
-		if (err) {
-			pr_err("failed to register GIC IRQ handler\n");
-			return -EINVAL;
-		}
+		irq_set_chained_handler_and_data(msi_group->gic_irq,
+			xgene_msi_isr, msi_group);
+
 		/*
 		 * Statically allocate MSI GIC IRQs to each CPU core.
 		 * With 8-core X-Gene v1, 2 MSI GIC IRQs are allocated

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Krzysztof Wilczyński <[email protected]>

[ Upstream commit 42814c438aac79746d310f413a27d5b0b959c5de ]

The for_each_available_child_of_node helper internally makes use of the of_get_next_available_child() which performs an of_node_get() on each iteration when searching for next available child node.

Should an available child node be found, then it would return a device node pointer with reference count incremented, thus early return from the middle of the loop requires an explicit of_node_put() to prevent reference count leak.

To stop the reference leak, explicitly call of_node_put() before returning after an error occurred.

---
 drivers/pci/host/pcie-mediatek.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

index c896bb9ef968..60c3110b5151 100644
@@ -1042,14 +1042,14 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
 		err = of_pci_get_devfn(child);
 		if (err < 0) {
 			dev_err(dev, "failed to parse devfn: %d\n", err);
-			return err;
+			goto error_put_node;
 		}
 
 		slot = PCI_SLOT(err);
 
 		err = mtk_pcie_parse_port(pcie, child, slot);
 		if (err)
-			return err;
+			goto error_put_node;
 	}
 
 	err = mtk_pcie_subsys_powerup(pcie);

@@ -1065,6 +1065,9 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
 		mtk_pcie_subsys_powerdown(pcie);
 
 	return 0;
+error_put_node:
+	of_node_put(child);
+	return err;
 }
 
 static int mtk_pcie_request_resources(struct mtk_pcie *pcie)

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Heiko Carstens <[email protected]>

[ Upstream commit 62c8dca9e194326802b43c60763f856d782b225c ]

Avoid a potentially large stack frame and overflow by making "cpumask_t avail" a static variable. There is no concurrent access due to the existing locking.

---
 arch/s390/kernel/smp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 40946c8587a5..d43b48d8f67d 100644
@@ -761,7 +761,7 @@ static int smp_add_core(struct sclp_core_entry *core, cpumask_t *avail,
 static int __smp_rescan_cpus(struct sclp_core_info *info, bool early)
 {
 	struct sclp_core_entry *core;
-	cpumask_t avail;
+	static cpumask_t avail;
 	bool configured;
 	u16 core_id;
 	int nr, i;

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Mike Christie <[email protected]>

[ Upstream commit d28d48c699779973ab9a3bd0e5acfa112bd4fdef ]

If iscsi_prep_scsi_cmd_pdu() fails we try to add it back to the cmdqueue, but we leave it partially setup. We don't have functions that can undo the pdu and init task setup. We only have cleanup_task which can clean up both parts. So this has us just fail the cmd and go through the standard cleanup routine and then have the SCSI midlayer retry it like is done when it fails in the queuecommand path.

---
 drivers/scsi/libiscsi.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

index f180d1b4553c..21efe27ebfcc 100644
@@ -1569,14 +1569,9 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
 		}
 		rc = iscsi_prep_scsi_cmd_pdu(conn->task);
 		if (rc) {
-			if (rc == -ENOMEM || rc == -EACCES) {
-				spin_lock_bh(&conn->taskqueuelock);
-				list_add_tail(&conn->task->running,
-					      &conn->cmdqueue);
-				conn->task = NULL;
-				spin_unlock_bh(&conn->taskqueuelock);
-				goto done;
-			} else
+			if (rc == -ENOMEM || rc == -EACCES)
+				fail_scsi_task(conn->task, DID_IMM_RETRY);
+			else
 				fail_scsi_task(conn->task, DID_ABORT);
 			spin_lock_bh(&conn->taskqueuelock);
 			continue;

2.30.1

From: Greg Kroah-Hartman <[email protected]>

From: Takashi Iwai <[email protected]>

commit eea46a0879bcca23e15071f9968c0f6e6596e470 upstream.

The per_pin->work might be still floating at the suspend, and this may hit the access to the hardware at an unexpected timing. Cancel the work properly at the suspend callback for avoiding the buggy access.

Note that the bug doesn't trigger easily in the recent kernels since the work is queued only when the repoll count is set, and usually it's only at the resume callback, but it's still possible to hit in theory.

---
 sound/pci/hda/patch_hdmi.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

@@ -2324,6 +2324,18 @@ static void generic_hdmi_free(struct hda
 }
 
 #ifdef CONFIG_PM
+static int generic_hdmi_suspend(struct hda_codec *codec)
+{
+	struct hdmi_spec *spec = codec->spec;
+	int pin_idx;
+
+	for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
+		struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
+		cancel_delayed_work_sync(&per_pin->work);
+	}
+	return 0;
+}
+
 static int generic_hdmi_resume(struct hda_codec *codec)
 {
 	struct hdmi_spec *spec = codec->spec;

@@ -2347,6 +2359,7 @@ static const struct hda_codec_ops generi
 	.build_controls		= generic_hdmi_build_controls,
 	.unsol_event		= hdmi_unsol_event,
 #ifdef CONFIG_PM
+	.suspend		= generic_hdmi_suspend,
 	.resume			= generic_hdmi_resume,
 #endif
 };

From: Greg Kroah-Hartman <[email protected]>

From: Takashi Iwai <[email protected]>

commit 28e96c1693ec1cdc963807611f8b5ad400431e82 upstream.

The commit c02f77d32d2c ("ALSA: hda - Workaround for crackled sound on AMD controller (1022:1457)") introduced a few workarounds for the recent AMD HD-audio controller, and one of them is the forced BATCH PCM mode so that PulseAudio avoids the timer-based scheduling. This was thought to cover for some badly working applications, but this actually worsens for more others. In total, this wasn't a good idea to enforce it.

This is a partial revert of the commit above for dropping the PCM BATCH enforcement part to recover from the regression again.

---
 sound/pci/hda/hda_controller.c |    7 -------
 1 file changed, 7 deletions(-)

@@ -624,13 +624,6 @@ static int azx_pcm_open(struct snd_pcm_s
 				     20,
 				     178000000);
 
-	/* by some reason, the playback stream stalls on PulseAudio with
-	 * tsched=1 when a capture stream triggers.  Until we figure out the
-	 * real cause, disable tsched mode by telling the PCM info flag.
-	 */
-	if (chip->driver_caps & AZX_DCAPS_AMD_WORKAROUND)
-		runtime->hw.info |= SNDRV_PCM_INFO_BATCH;
-
 	if (chip->align_buffer_size)
 		/* constrain buffer sizes to be multiple of 128
 		   bytes. This is more efficient in terms of memory

From: Greg Kroah-Hartman <[email protected]>

From: Takashi Iwai <[email protected]>

commit 5ff9dde42e8c72ed8102eb8cb62e03f9dc2103ab upstream.

When HD-audio bus receives unsolicited events during its system suspend/resume (S3 and S4) phase, the controller driver may still try to process events although the codec chips are already (or yet) powered down. This might screw up the codec communication, resulting in CORB/RIRB errors. Such events should be rather skipped, as the codec chip status such as the jack status will be fully refreshed at the system resume time.

Since we're tracking the system suspend/resume state in codec power.power_state field, let's add the check in the common unsol event handler entry point to filter out such events.

---
 sound/pci/hda/hda_bind.c |    4 ++++
 1 file changed, 4 insertions(+)

@@ -46,6 +46,10 @@ static void hda_codec_unsol_event(struct
 	if (codec->bus->shutdown)
 		return;
 
+	/* ignore unsol events during system suspend/resume */
+	if (codec->core.dev.power.power_state.event != PM_EVENT_ON)
+		return;
+
 	if (codec->patch_ops.unsol_event)
 		codec->patch_ops.unsol_event(codec, ev);
 }

From: Greg Kroah-Hartman <[email protected]>

From: Takashi Iwai <[email protected]>

commit fec60c3bc5d1713db2727cdffc638d48f9c07dc3 upstream.

Dell AE515 sound bar (413c:a506) spews the error messages when the driver tries to read the current sample frequency, hence it needs to be on the list in snd_usb_get_sample_rate_quirk().

---
 sound/usb/quirks.c |    1 +
 1 file changed, 1 insertion(+)

@@ -1155,6 +1155,7 @@ bool snd_usb_get_sample_rate_quirk(struc
 	case USB_ID(0x1de7, 0x0114): /* Phoenix Audio MT202pcs */
 	case USB_ID(0x21B4, 0x0081): /* AudioQuest DragonFly */
 	case USB_ID(0x2912, 0x30c8): /* Audioengine D1 */
+	case USB_ID(0x413c, 0xa506): /* Dell AE515 sound bar */
 		return true;
 	}
 	return false;

From: Greg Kroah-Hartman <[email protected]>

From: Eric W. Biederman <[email protected]>

commit 3b0c2d3eaa83da259d7726192cf55a137769012f upstream.

It turns out that there are in fact userspace implementations that care and this recent change caused a regression.

https://github.com/containers/buildah/issues/3071

As the motivation for the original change was future development, and the impact is existing real world code just revert this change and allow the ambiguity in v3 file caps.

---
 security/commoncap.c |   12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

@@ -507,8 +507,7 @@ int cap_convert_nscap(struct dentry *den
 	__u32 magic, nsmagic;
 	struct inode *inode = d_backing_inode(dentry);
 	struct user_namespace *task_ns = current_user_ns(),
-		*fs_ns = inode->i_sb->s_user_ns,
-		*ancestor;
+		*fs_ns = inode->i_sb->s_user_ns;
 	kuid_t rootid;
 	size_t newsize;
 

@@ -531,15 +530,6 @@ int cap_convert_nscap(struct dentry *den
 	if (nsrootid == -1)
 		return -EINVAL;
 
-	/*
-	 * Do not allow allow adding a v3 filesystem capability xattr
-	 * if the rootid field is ambiguous.
-	 */
-	for (ancestor = task_ns->parent; ancestor; ancestor = ancestor->parent) {
-		if (from_kuid(ancestor, rootid) == 0)
-			return -EINVAL;
-	}
-
 	newsize = sizeof(struct vfs_ns_cap_data);
 	nscap = kmalloc(newsize, GFP_ATOMIC);
 	if (!nscap)

From: Greg Kroah-Hartman <[email protected]>

From: Stefan Haberland <[email protected]>

commit 7d365bd0bff3c0310c39ebaffc9a8458e036d666 upstream.

In case of an unbind of the DASD device driver the function dasd_generic_remove() is called which shuts down the device. Among others this functions removes the int_handler from the cdev. During shutdown the device cancels all outstanding IO requests and waits for completion of the clear request.
Unfortunately the clear interrupt will never be received when there is no interrupt handler connected.

Fix by moving the int_handler removal after the call to the state machine where no request or interrupt is outstanding.

---
 drivers/s390/block/dasd.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

@@ -3489,8 +3489,6 @@ void dasd_generic_remove(struct ccw_devi
 	struct dasd_device *device;
 	struct dasd_block *block;
 
-	cdev->handler = NULL;
-
 	device = dasd_device_from_cdev(cdev);
 	if (IS_ERR(device)) {
 		dasd_remove_sysfs_files(cdev);

@@ -3509,6 +3507,7 @@ void dasd_generic_remove(struct ccw_devi
 	 * no quite down yet.
 	 */
 	dasd_set_target_state(device, DASD_STATE_NEW);
+	cdev->handler = NULL;
 	/* dasd_delete_device destroys the device reference. */
 	block = device->block;
 	dasd_delete_device(device);

From: Greg Kroah-Hartman <[email protected]>

From: Stefan Haberland <[email protected]>

commit 66f669a272898feb1c69b770e1504aa2ec7723d1 upstream.

Prevent that an IO request is build during device shutdown initiated by a driver unbind. This request will never be able to be processed or canceled and will hang forever. This will lead also to a hanging unbind.

Fix by checking not only if the device is in READY state but also check that there is no device offline initiated before building a new IO request.

---
 drivers/s390/block/dasd.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -2998,7 +2998,8 @@ static blk_status_t do_dasd_request(stru
 
 	basedev = block->base;
 	spin_lock_irq(&dq->lock);
-	if (basedev->state < DASD_STATE_READY) {
+	if (basedev->state < DASD_STATE_READY ||
+	    test_bit(DASD_FLAG_OFFLINE, &basedev->flags)) {
 		DBF_DEV_EVENT(DBF_ERR, basedev,
 			      "device not ready for request %p", req);
 		rc = BLK_STS_IOERR;

From: Greg Kroah-Hartman <[email protected]>

From: Adrian Hunter <[email protected]>

commit 66fbacccbab91e6e55d9c8f1fc0910a8eb6c81f7 upstream.

Avoid the following warning by always defining partition switch time:

 [    3.209874] mmc1: unspecified timeout for CMD6 - use generic
 [    3.222780] ------------[ cut here ]------------
 [    3.233363] WARNING: CPU: 1 PID: 111 at drivers/mmc/core/mmc_ops.c:575 __mmc_switch+0x200/0x204

---
 drivers/mmc/core/mmc.c |   15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

@@ -426,10 +426,6 @@ static int mmc_decode_ext_csd(struct mmc
 
 		/* EXT_CSD value is in units of 10ms, but we store in ms */
 		card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
-		/* Some eMMC set the value too low so set a minimum */
-		if (card->ext_csd.part_time &&
-		    card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
-			card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
 
 		/* Sleep / awake timeout in 100ns units */
 		if (sa_shift > 0 && sa_shift <= 0x17)

@@ -619,6 +615,17 @@ static int mmc_decode_ext_csd(struct mmc
 		card->ext_csd.data_sector_size = 512;
 	}
 
+	/*
+	 * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined
+	 * when accessing a specific field", so use it here if there is no
+	 * PARTITION_SWITCH_TIME.
+	 */
+	if (!card->ext_csd.part_time)
+		card->ext_csd.part_time = card->ext_csd.generic_cmd6_time;
+	/* Some eMMC set the value too low so set a minimum */
+	if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
+		card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
+
 	/* eMMC v5 or later */
 	if (card->ext_csd.rev >= 7) {
 		memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],

From: Greg Kroah-Hartman <[email protected]>

From: Yorick de Wid <[email protected]>

commit 4d8654e81db7346f915eca9f1aff18f385cab621 upstream.

The CDC ACM driver is false matching the Goodix Fingerprint device against the USB_CDC_ACM_PROTO_AT_V25TER.

The Goodix Fingerprint device is a biometrics sensor that should be handled in user-space. libfprint has some support for Goodix fingerprint sensors, although not for this particular one. It is possible that the vendor allocates a PID per OEM (Lenovo, Dell etc). If this happens to be the case then more devices from the same vendor could potentially match the ACM modem module table.

---
 drivers/usb/class/cdc-acm.c |    5 +++++
 1 file changed, 5 insertions(+)

@@ -1986,6 +1986,11 @@ static const struct usb_device_id acm_id
 	.driver_info = SEND_ZERO_PACKET,
 	},
 
+	/* Exclude Goodix Fingerprint Reader */
+	{ USB_DEVICE(0x27c6, 0x5395),
+	.driver_info = IGNORE_DEVICE,
+	},
+
 	/* control interfaces without any protocol set */
 	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
 		USB_CDC_PROTO_NONE) },

From: Greg Kroah-Hartman <[email protected]>

From: Dan Carpenter <[email protected]>

commit 650bf52208d804ad5ee449c58102f8dc43175573 upstream.

If the string is invalid, this should return -EINVAL instead of 0.

---
 drivers/usb/gadget/function/u_ether_configfs.h |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

@@ -172,12 +172,11 @@ out:									\
 						size_t len)		\
 	{								\
 		struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item);	\
-		int ret;						\
+		int ret = -EINVAL;					\
 		u8 val;							\
 									\
 		mutex_lock(&opts->lock);				\
-		ret = sscanf(page, "%02hhx", &val);			\
-		if (ret > 0) {						\
+		if (sscanf(page, "%02hhx", &val) > 0) {			\
 			opts->_n_ = val;				\
 			ret = len;					\
 		}							\

From: Greg Kroah-Hartman <[email protected]>

From: Ruslan Bilovol <[email protected]>

commit 789ea77310f0200c84002884ffd628e2baf3ad8a upstream.

As per UAC2 Audio Data Formats spec (2.3.1.1 USB Packets), if the sampling rate is a constant, the allowable variation of number of audio slots per virtual frame is +/- 1 audio slot.

It means that endpoint should be able to accept/send +1 audio slot.

Previous endpoint max_packet_size calculation code was adding sometimes +1 audio slot due to DIV_ROUND_UP behaviour which was rounding up to closest integer. However this doesn't work if the numbers are divisible.

It had no any impact with Linux hosts which ignore this issue, but in case of more strict Windows it caused rejected enumeration

Thus always add +1 audio slot to endpoint's max packet size

---
 drivers/usb/gadget/function/f_uac2.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -486,7 +486,7 @@ static int set_ep_max_packet_size(const
 	}
 
 	max_size_bw = num_channels(chmask) * ssize *
-		DIV_ROUND_UP(srate, factor / (1 << (ep_desc->bInterval - 1)));
+		((srate / (factor / (1 << (ep_desc->bInterval - 1)))) + 1);
 	ep_desc->wMaxPacketSize = cpu_to_le16(min_t(u16, max_size_bw,
 						    max_size_ep));
 

From: Greg Kroah-Hartman <[email protected]>

From: Ruslan Bilovol <[email protected]>

commit cc2ac63d4cf72104e0e7f58bb846121f0f51bb19 upstream.

There is missing playback stop/cleanup in case of gadget's ->disable callback that happens on events like USB host resetting or gadget disconnection

---
 drivers/usb/gadget/function/f_uac1.c |    1 +
 1 file changed, 1 insertion(+)

@@ -503,6 +503,7 @@ static void f_audio_disable(struct usb_f
 	uac1->as_out_alt = 0;
 	uac1->as_in_alt = 0;
 
+	u_audio_stop_playback(&uac1->g_audio);
 	u_audio_stop_capture(&uac1->g_audio);
 }
 

From: Greg Kroah-Hartman <[email protected]>

From: Yoshihiro Shimoda <[email protected]>

commit b1d25e6ee57c2605845595b6c61340d734253eb3 upstream.

According to the datasheet, this controller has a restriction which "set an endpoint number so that combinations of the DIR bit and the EPNUM bits do not overlap.". However, since the udc core driver is possible to assign a bulk pipe as an interrupt endpoint, an endpoint number may not match the pipe number. After that, when user rebinds another gadget driver, this driver broke the restriction because the driver didn't clear any configuration in usb_ep_disable().

Example:

 # modprobe g_ncm
 Then, EP3 = pipe 3, EP4 = pipe 4, EP5 = pipe 6
 # rmmod g_ncm
 # modprobe g_hid
 Then, EP3 = pipe 6, EP4 = pipe 7.
 So, pipe 3 and pipe 6 are set as EP3.

So, clear PIPECFG register in usbhs_pipe_free().

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

@@ -746,6 +746,8 @@ struct usbhs_pipe *usbhs_pipe_malloc(str
 
 void usbhs_pipe_free(struct usbhs_pipe *pipe)
 {
+	usbhsp_pipe_select(pipe);
+	usbhsp_pipe_cfg_set(pipe, 0xFFFF, 0);
 	usbhsp_put_pipe(pipe);
 }
 

From: Greg Kroah-Hartman <[email protected]>

From: Mathias Nyman <[email protected]>

commit 253f588c70f66184b1f3a9bbb428b49bbda73e80 upstream.

A xHC USB 3 port might miss the first wake signal from a USB 3 device if the port LFPS reveiver isn't enabled fast enough after xHC resume.

xHC host will anyway be resumed by a PME# signal, but will go back to suspend if no port activity is seen.
The device resends the U3 LFPS wake signal after a 100ms delay, but by then host is already suspended, starting all over from the beginning of this issue.

USB 3 specs say U3 wake LFPS signal is sent for max 10ms, then device needs to delay 100ms before resending the wake.

Don't suspend immediately if port activity isn't detected in resume. Instead add a retry. If there is no port activity then delay for 120ms, and re-check for port activity.

---
 drivers/usb/host/xhci.c |   16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

@@ -1021,6 +1021,7 @@ int xhci_resume(struct xhci_hcd *xhci, b
 	struct usb_hcd		*secondary_hcd;
 	int			retval = 0;
 	bool			comp_timer_running = false;
+	bool			pending_portevent = false;
 
 	if (!hcd->state)
 		return 0;

@@ -1154,13 +1155,22 @@ int xhci_resume(struct xhci_hcd *xhci, b
 
  done:
 	if (retval == 0) {
-		/* Resume root hubs only when have pending events. */
-		if (xhci_pending_portevent(xhci)) {
+		/*
+		 * Resume roothubs only if there are pending events.
+		 * USB 3 devices resend U3 LFPS wake after a 100ms delay if
+		 * the first wake signalling failed, give it that chance.
+		 */
+		pending_portevent = xhci_pending_portevent(xhci);
+		if (!pending_portevent) {
+			msleep(120);
+			pending_portevent = xhci_pending_portevent(xhci);
+		}
+
+		if (pending_portevent) {
 			usb_hcd_resume_root_hub(xhci->shared_hcd);
 			usb_hcd_resume_root_hub(hcd);
 		}
 	}
-
 	/*
 	 * If system is subject to the Quirk, Compliance Mode Timer needs to
 	 * be re-initialized Always after a system resume. Ports are subject

From: Greg Kroah-Hartman <[email protected]>

From: Forest Crossman <[email protected]>

commit b71c669ad8390dd1c866298319ff89fe68b45653 upstream.

I've confirmed that both the ASMedia ASM1042A and ASM3242 have the same problem as the ASM1142 and ASM2142/ASM3142, where they lose some of the upper bits of 64-bit DMA addresses. As with the other chips, this can cause problems on systems where the upper bits matter, and adding the XHCI_NO_64BIT_SUPPORT quirk completely fixes the issue.

---
 drivers/usb/host/xhci-pci.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

@@ -63,6 +63,7 @@
 #define PCI_DEVICE_ID_ASMEDIA_1042A_XHCI		0x1142
 #define PCI_DEVICE_ID_ASMEDIA_1142_XHCI			0x1242
 #define PCI_DEVICE_ID_ASMEDIA_2142_XHCI			0x2142
+#define PCI_DEVICE_ID_ASMEDIA_3242_XHCI			0x3242
 
 static const char hcd_name[] = "xhci_hcd";
 

@@ -236,11 +237,14 @@ static void xhci_pci_quirks(struct devic
 		pdev->device == PCI_DEVICE_ID_ASMEDIA_1042_XHCI)
 		xhci->quirks |= XHCI_BROKEN_STREAMS;
 	if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
-		pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI)
+		pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI) {
 		xhci->quirks |= XHCI_TRUST_TX_LENGTH;
+		xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
+	}
 	if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
 	    (pdev->device == PCI_DEVICE_ID_ASMEDIA_1142_XHCI ||
-	     pdev->device == PCI_DEVICE_ID_ASMEDIA_2142_XHCI))
+	     pdev->device == PCI_DEVICE_ID_ASMEDIA_2142_XHCI ||
+	     pdev->device == PCI_DEVICE_ID_ASMEDIA_3242_XHCI))
 		xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
 
 	if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&

From: Greg Kroah-Hartman <[email protected]>

From: Pavel Skripkin <[email protected]>

commit cfdc67acc785e01a8719eeb7012709d245564701 upstream.

sysbot found memory leak in edge_startup().
The problem was that when an error was received from the usb_submit_urb(), nothing was cleaned up.

---
 drivers/usb/serial/io_edgeport.c |   26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

@@ -3025,26 +3025,32 @@ static int edge_startup(struct usb_seria
 				response = -ENODEV;
 			}
 
-			usb_free_urb(edge_serial->interrupt_read_urb);
-			kfree(edge_serial->interrupt_in_buffer);
-
-			usb_free_urb(edge_serial->read_urb);
-			kfree(edge_serial->bulk_in_buffer);
-
-			kfree(edge_serial);
-
-			return response;
+			goto error;
 		}
 
 		/* start interrupt read for this edgeport this interrupt will
 		 * continue as long as the edgeport is connected */
 		response = usb_submit_urb(edge_serial->interrupt_read_urb,
 								GFP_KERNEL);
-		if (response)
+		if (response) {
 			dev_err(ddev, "%s - Error %d submitting control urb\n",
 				__func__, response);
+
+			goto error;
+		}
 	}
 	return response;
+
+error:
+	usb_free_urb(edge_serial->interrupt_read_urb);
+	kfree(edge_serial->interrupt_in_buffer);
+
+	usb_free_urb(edge_serial->read_urb);
+	kfree(edge_serial->bulk_in_buffer);
+
+	kfree(edge_serial);
+
+	return response;
 }
 
 

From: Greg Kroah-Hartman <[email protected]>

From: Niv Sardi <[email protected]>

commit 5563b3b6420362c8a1f468ca04afe6d5f0a8d0a3 upstream.

Add PID for CH340 that's found on cheap programmers.

The driver works flawlessly as soon as the new PID (0x9986) is added to it. These look like ANU232MI but ship with a ch341 inside. They have no special identifiers (mine only has the string "DB9D20130716" printed on the PCB and nothing identifiable on the packaging. The merchant i bought it from doesn't sell these anymore).

the lsusb -v output is:
Bus 001 Device 009: ID 9986:7523
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 255 Vendor Specific Class

  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x9986
  idProduct          0x7523
  bcdDevice            2.54
  iManufacturer           0
  iProduct                0
  iSerial                 0
  bNumConfigurations      1

Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0027
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 96mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 1
bInterfaceProtocol 2
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 1

---
 drivers/usb/serial/ch341.c |    1 +
 1 file changed, 1 insertion(+)

@@ -88,6 +88,7 @@ static const struct usb_device_id id_tab
 	{ USB_DEVICE(0x1a86, 0x7522) },
 	{ USB_DEVICE(0x1a86, 0x7523) },
 	{ USB_DEVICE(0x4348, 0x5523) },
+	{ USB_DEVICE(0x9986, 0x7523) },
 	{ },
 };
 MODULE_DEVICE_TABLE(usb, id_table);

From: Greg Kroah-Hartman <[email protected]>

From: Karan Singhal <[email protected]>

commit ca667a33207daeaf9c62b106815728718def60ec upstream.

IDs of nLight Air Adapter, Acuity Brands, Inc.:
vid: 10c4
pid: 88d8

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

@@ -149,6 +149,7 @@ static const struct usb_device_id id_tab
 	{ USB_DEVICE(0x10C4, 0x8857) },	/* CEL EM357 ZigBee USB Stick */
 	{ USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
 	{ USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
+	{ USB_DEVICE(0x10C4, 0x88D8) }, /* Acuity Brands nLight Air Adapter */
 	{ USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */
 	{ USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */
 	{ USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */

From: Greg Kroah-Hartman <[email protected]>

From: Sebastian Reichel <[email protected]>

commit 42213a0190b535093a604945db05a4225bf43885 upstream.

GE CS1000 has some more custom USB IDs for CP2102N; add them to the driver to have working auto-probing.

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

@@ -206,6 +206,8 @@ static const struct usb_device_id id_tab
 	{ USB_DEVICE(0x1901, 0x0194) },	/* GE Healthcare Remote Alarm Box */
 	{ USB_DEVICE(0x1901, 0x0195) },	/* GE B850/B650/B450 CP2104 DP UART interface */
 	{ USB_DEVICE(0x1901, 0x0196) },	/* GE B850 CP2105 DP UART interface */
+	{ USB_DEVICE(0x1901, 0x0197) }, /* GE CS1000 Display serial interface */
+	{ USB_DEVICE(0x1901, 0x0198) }, /* GE CS1000 M.2 Key E serial interface */
 	{ USB_DEVICE(0x199B, 0xBA30) }, /* LORD WSDA-200-USB */
 	{ USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
 	{ USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */

From: Greg Kroah-Hartman <[email protected]>

From: Shuah Khan <[email protected]>

commit 47ccc8fc2c9c94558b27b6f9e2582df32d29e6e8 upstream.

Fix usbip_sockfd_store() to validate the passed in file descriptor is a stream socket. If the file descriptor passed was a SOCK_DGRAM socket, sock_recvmsg() can't detect end of stream.

---
 drivers/usb/usbip/stub_dev.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

@@ -83,8 +83,16 @@ static ssize_t store_sockfd(struct devic
 		}
 
 		socket = sockfd_lookup(sockfd, &err);
-		if (!socket)
+		if (!socket) {
+			dev_err(dev, "failed to lookup sock");
 			goto err;
+		}
+
+		if (socket->type != SOCK_STREAM) {
+			dev_err(dev, "Expecting SOCK_STREAM - found %d",
+				socket->type);
+			goto sock_err;
+		}
 
 		sdev->ud.tcp_socket = socket;
 		sdev->ud.sockfd = sockfd;

@@ -114,6 +122,8 @@ static ssize_t store_sockfd(struct devic
 
 	return count;
 
+sock_err:
+	sockfd_put(socket);
 err:
 	spin_unlock_irq(&sdev->ud.lock);
 	return -EINVAL;

From: Greg Kroah-Hartman <[email protected]>

From: Shuah Khan <[email protected]>

commit f55a0571690c4aae03180e001522538c0927432f upstream.

Fix attach_store() to validate the passed in file descriptor is a stream socket. If the file descriptor passed was a SOCK_DGRAM socket, sock_recvmsg() can't detect end of stream.

---
 drivers/usb/usbip/vhci_sysfs.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

@@ -363,8 +363,16 @@ static ssize_t store_attach(struct devic
 
 	/* Extract socket from fd. */
 	socket = sockfd_lookup(sockfd, &err);
-	if (!socket)
+	if (!socket) {
+		dev_err(dev, "failed to lookup sock");
 		return -EINVAL;
+	}
+	if (socket->type != SOCK_STREAM) {
+		dev_err(dev, "Expecting SOCK_STREAM - found %d",
+			socket->type);
+		sockfd_put(socket);
+		return -EINVAL;
+	}
 
 	/* now need lock until setting vdev status as used */
 

From: Greg Kroah-Hartman <[email protected]>

From: Shuah Khan <[email protected]>

commit 6801854be94fe8819b3894979875ea31482f5658 upstream.

Fix usbip_sockfd_store() to validate the passed in file descriptor is a stream socket. If the file descriptor passed was a SOCK_DGRAM socket, sock_recvmsg() can't detect end of stream.

---
 drivers/usb/usbip/vudc_sysfs.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

@@ -24,6 +24,7 @@
 #include <linux/usb/ch9.h>
 #include <linux/sysfs.h>
 #include <linux/kthread.h>
+#include <linux/file.h>
 #include <linux/byteorder/generic.h>
 
 #include "usbip_common.h"

@@ -150,6 +151,13 @@ static ssize_t store_sockfd(struct devic
 			goto unlock_ud;
 		}
 
+		if (socket->type != SOCK_STREAM) {
+			dev_err(dev, "Expecting SOCK_STREAM - found %d",
+				socket->type);
+			ret = -EINVAL;
+			goto sock_err;
+		}
+
 		udc->ud.tcp_socket = socket;
 
 		spin_unlock_irq(&udc->ud.lock);

@@ -189,6 +197,8 @@ static ssize_t store_sockfd(struct devic
 
 	return count;
 
+sock_err:
+	sockfd_put(socket);
 unlock_ud:
 	spin_unlock_irq(&udc->ud.lock);
 unlock:

From: Greg Kroah-Hartman <[email protected]>

From: Shuah Khan <[email protected]>

commit 9380afd6df70e24eacbdbde33afc6a3950965d22 upstream.

usbip_sockfd_store() is invoked when user requests attach (import) detach (unimport) usb device from usbip host. vhci_hcd sends import request and usbip_sockfd_store() exports the device if it is free for export.

Export and unexport are governed by local state and shared state
- Shared state (usbip device status, sockfd) - sockfd and Device status are used to determine if stub should be brought up or shut down.
- Local state (tcp_socket, rx and tx thread task_struct ptrs) A valid tcp_socket controls rx and tx thread operations while the device is in exported state.
- While the device is exported, device status is marked used and socket, sockfd, and thread pointers are valid.

Export sequence (stub-up) includes validating the socket and creating receive (rx) and transmit (tx) threads to talk to the client to provide access to the exported device. rx and tx threads depends on local and shared state to be correct and in sync.

Unexport (stub-down) sequence shuts the socket down and stops the rx and tx threads. Stub-down sequence relies on local and shared states to be in sync.

There are races in updating the local and shared status in the current stub-up sequence resulting in crashes. These stem from starting rx and tx threads before local and global state is updated correctly to be in sync.

1. Doesn't handle kthread_create() error and saves invalid ptr in local state that drives rx and tx threads.
2. Updates tcp_socket and sockfd, starts stub_rx and stub_tx threads before updating usbip_device status to SDEV_ST_USED. This opens up a race condition between the threads and usbip_sockfd_store() stub up and down handling.

Fix the above problems:
- Stop using kthread_get_run() macro to create/start threads.
- Create threads and get task struct reference.
- Add kthread_create() failure handling and bail out.
- Hold usbip_device lock to update local and shared states after creating rx and tx threads.
- Update usbip_device status to SDEV_ST_USED.
- Update usbip_device tcp_socket, sockfd, tcp_rx, and tcp_tx
- Start threads after usbip_device (tcp_socket, sockfd, tcp_rx, tcp_tx, and status) is complete.

Credit goes to syzbot and Tetsuo Handa for finding and root-causing the kthread_get_run() improper error handling problem and others. This is a hard problem to find and debug since the races aren't seen in a normal case. Fuzzing forces the race window to be small enough for the kthread_get_run() error path bug and starting threads before updating the local and shared state bug in the stub-up sequence.

Tested with syzbot reproducer:
- https://syzkaller.appspot.com/text?tag=ReproC&x=14801034d00000

---
 drivers/usb/usbip/stub_dev.c |   32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

@@ -60,6 +60,8 @@ static ssize_t store_sockfd(struct devic
 	int sockfd = 0;
 	struct socket *socket;
 	int rv;
+	struct task_struct *tcp_rx = NULL;
+	struct task_struct *tcp_tx = NULL;
 
 	if (!sdev) {
 		dev_err(dev, "sdev is null\n");

@@ -94,20 +96,36 @@ static ssize_t store_sockfd(struct devic
 			goto sock_err;
 		}
 
-		sdev->ud.tcp_socket = socket;
-		sdev->ud.sockfd = sockfd;
-
+		/* unlock and create threads and get tasks */
 		spin_unlock_irq(&sdev->ud.lock);
+		tcp_rx = kthread_create(stub_rx_loop, &sdev->ud, "stub_rx");
+		if (IS_ERR(tcp_rx)) {
+			sockfd_put(socket);
+			return -EINVAL;
+		}
+		tcp_tx = kthread_create(stub_tx_loop, &sdev->ud, "stub_tx");
+		if (IS_ERR(tcp_tx)) {
+			kthread_stop(tcp_rx);
+			sockfd_put(socket);
+			return -EINVAL;
+		}
 
-		sdev->ud.tcp_rx = kthread_get_run(stub_rx_loop, &sdev->ud,
-						  "stub_rx");
-		sdev->ud.tcp_tx = kthread_get_run(stub_tx_loop, &sdev->ud,
-						  "stub_tx");
+		/* get task structs now */
+		get_task_struct(tcp_rx);
+		get_task_struct(tcp_tx);
 
+		/* lock and update sdev->ud state */
 		spin_lock_irq(&sdev->ud.lock);
+		sdev->ud.tcp_socket = socket;
+		sdev->ud.sockfd = sockfd;
+		sdev->ud.tcp_rx = tcp_rx;
+		sdev->ud.tcp_tx = tcp_tx;
 		sdev->ud.status = SDEV_ST_USED;
 		spin_unlock_irq(&sdev->ud.lock);
 
+		wake_up_process(sdev->ud.tcp_rx);
+		wake_up_process(sdev->ud.tcp_tx);
+
 	} else {
 		dev_info(dev, "stub down\n");
 

From: Greg Kroah-Hartman <[email protected]>

From: Shuah Khan <[email protected]>

commit 718ad9693e3656120064b715fe931f43a6201e67 upstream.

attach_store() is invoked when user requests import (attach) a device from usbip host.

Attach and detach are governed by local state and shared state
- Shared state (usbip device status) - Device status is used to manage the attach and detach operations on import-able devices.
- Local state (tcp_socket, rx and tx thread task_struct ptrs) A valid tcp_socket controls rx and tx thread operations while the device is in exported state.
- Device has to be in the right state to be attached and detached.

Attach sequence includes validating the socket and creating receive (rx) and transmit (tx) threads to talk to the host to get access to the imported device. rx and tx threads depends on local and shared state to be correct and in sync.

Detach sequence shuts the socket down and stops the rx and tx threads. Detach sequence relies on local and shared states to be in sync.

There are races in updating the local and shared status in the current attach sequence resulting in crashes. These stem from starting rx and tx threads before local and global state is updated correctly to be in sync.

1. Doesn't handle kthread_create() error and saves invalid ptr in local state that drives rx and tx threads.
2. Updates tcp_socket and sockfd, starts stub_rx and stub_tx threads before updating usbip_device status to VDEV_ST_NOTASSIGNED. This opens up a race condition between the threads, port connect, and detach handling.

Fix the above problems:
- Stop using kthread_get_run() macro to create/start threads.
- Create threads and get task struct reference.
- Add kthread_create() failure handling and bail out.
- Hold vhci and usbip_device locks to update local and shared states after creating rx and tx threads.
- Update usbip_device status to VDEV_ST_NOTASSIGNED.
- Update usbip_device tcp_socket, sockfd, tcp_rx, and tcp_tx
- Start threads after usbip_device (tcp_socket, sockfd, tcp_rx, tcp_tx, and status) is complete.

Credit goes to syzbot and Tetsuo Handa for finding and root-causing the kthread_get_run() improper error handling problem and others. This is hard problem to find and debug since the races aren't seen in a normal case. Fuzzing forces the race window to be small enough for the kthread_get_run() error path bug and starting threads before updating the local and shared state bug in the attach sequence.
- Update usbip_device tcp_rx and tcp_tx pointers holding vhci and usbip_device locks.

Tested with syzbot reproducer:
- https://syzkaller.appspot.com/text?tag=ReproC&x=14801034d00000

---
 drivers/usb/usbip/vhci_sysfs.c |   29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

@@ -326,6 +326,8 @@ static ssize_t store_attach(struct devic
 	struct vhci *vhci;
 	int err;
 	unsigned long flags;
+	struct task_struct *tcp_rx = NULL;
+	struct task_struct *tcp_tx = NULL;
 
 	/*
 	 * @rhport: port number of vhci_hcd

@@ -374,9 +376,24 @@ static ssize_t store_attach(struct devic
 		return -EINVAL;
 	}
 
-	/* now need lock until setting vdev status as used */
+	/* create threads before locking */
+	tcp_rx = kthread_create(vhci_rx_loop, &vdev->ud, "vhci_rx");
+	if (IS_ERR(tcp_rx)) {
+		sockfd_put(socket);
+		return -EINVAL;
+	}
+	tcp_tx = kthread_create(vhci_tx_loop, &vdev->ud, "vhci_tx");
+	if (IS_ERR(tcp_tx)) {
+		kthread_stop(tcp_rx);
+		sockfd_put(socket);
+		return -EINVAL;
+	}
+
+	/* get task structs now */
+	get_task_struct(tcp_rx);
+	get_task_struct(tcp_tx);
 
-	/* begin a lock */
+	/* now begin lock until setting vdev status set */
 	spin_lock_irqsave(&vhci->lock, flags);
 	spin_lock(&vdev->ud.lock);
 

@@ -386,6 +403,8 @@ static ssize_t store_attach(struct devic
 		spin_unlock_irqrestore(&vhci->lock, flags);
 
 		sockfd_put(socket);
+		kthread_stop_put(tcp_rx);
+		kthread_stop_put(tcp_tx);
 
 		dev_err(dev, "port %d already used\n", rhport);
 		/*

@@ -404,14 +423,16 @@ static ssize_t store_attach(struct devic
 	vdev->speed         = speed;
 	vdev->ud.sockfd     = sockfd;
 	vdev->ud.tcp_socket = socket;
+	vdev->ud.tcp_rx     = tcp_rx;
+	vdev->ud.tcp_tx     = tcp_tx;
 	vdev->ud.status     = VDEV_ST_NOTASSIGNED;
 
 	spin_unlock(&vdev->ud.lock);
 	spin_unlock_irqrestore(&vhci->lock, flags);
 	/* end the lock */
 
-	vdev->ud.tcp_rx = kthread_get_run(vhci_rx_loop, &vdev->ud, "vhci_rx");
-	vdev->ud.tcp_tx = kthread_get_run(vhci_tx_loop, &vdev->ud, "vhci_tx");
+	wake_up_process(vdev->ud.tcp_rx);
+	wake_up_process(vdev->ud.tcp_tx);
 
 	rh_port_connect(vdev, speed);
 

From: Greg Kroah-Hartman <[email protected]>

From: Dan Carpenter <[email protected]>

commit 87107518d7a93fec6cdb2559588862afeee800fb upstream.

We need to cap len at IW_ESSID_MAX_SIZE (32) to avoid memory corruption. This can be controlled by the user via the ioctl.

---
 drivers/staging/rtl8192u/r8192U_wx.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

@@ -333,8 +333,10 @@ static int r8192_wx_set_scan(struct net_
 		struct iw_scan_req *req = (struct iw_scan_req *)b;
 
 		if (req->essid_len) {
-			ieee->current_network.ssid_len = req->essid_len;
-			memcpy(ieee->current_network.ssid, req->essid, req->essid_len);
+			int len = min_t(int, req->essid_len, IW_ESSID_MAX_SIZE);
+
+			ieee->current_network.ssid_len = len;
+			memcpy(ieee->current_network.ssid, req->essid, len);
 		}
 	}
 

From: Greg Kroah-Hartman <[email protected]>

From: Dan Carpenter <[email protected]>

commit 74b6b20df8cfe90ada777d621b54c32e69e27cd7 upstream.

This code has a check to prevent read overflow but it needs another check to prevent writing beyond the end of the ->ssid[] array.

---
 drivers/staging/rtl8188eu/os_dep/ioctl_linux.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)