5.4.183-rc1 review

This is the start of the stable review cycle for the 5.4.183 release. There are 64 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, 09 Mar 2022 09:16:25 +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/v5.x/stable-review/patch-5.4.183-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-5.4.y
and the diffstat can be found below.

thanks,

greg k-h

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

Greg Kroah-Hartman <[email protected]>

    Linux 5.4.183-rc1

Vladimir Oltean <[email protected]>
net: dcb: disable softirqs in dcbnl_flush_dev()

Jiri Bohac <[email protected]>
Revert "xfrm: xfrm_state_mtu should return at least 1280 for ipv6"

Filipe Manana <[email protected]>
btrfs: add missing run of delayed items after unlink during log replay

Sidong Yang <[email protected]>
btrfs: qgroup: fix deadlock between rescan worker and remove qgroup

Filipe Manana <[email protected]>
btrfs: fix lost prealloc extents beyond eof after full fsync

Randy Dunlap <[email protected]>
tracing: Fix return value of __setup handlers

Steven Rostedt (Google) <[email protected]>
tracing/histogram: Fix sorting on old "cpu" value

William Mahon <[email protected]>
HID: add mapping for KEY_ALL_APPLICATIONS

William Mahon <[email protected]>
HID: add mapping for KEY_DICTATE

Hans de Goede <[email protected]>
Input: elan_i2c - fix regulator enable count imbalance after suspend/resume

Hans de Goede <[email protected]>
Input: elan_i2c - move regulator_[en|dis]able() out of elan_[en|dis]able_power()

Jiasheng Jiang <[email protected]>
nl80211: Handle nla_memdup failures in handle_nan_filter

Jia-Ju Bai <[email protected]>
net: chelsio: cxgb3: check the return value of pci_find_capability()

Jiasheng Jiang <[email protected]>
soc: fsl: qe: Check of ioremap return value

Hugh Dickins <[email protected]>
memfd: fix F_SEAL_WRITE after shmem huge page allocated

Sukadev Bhattiprolu <[email protected]>
ibmvnic: free reset-work-item when flushing

Sasha Neftin <[email protected]>
igc: igc_write_phy_reg_gpy: drop premature return

Randy Dunlap <[email protected]>
ARM: 9182/1: mmu: fix returns from early_param() and __setup() functions

Russell King (Oracle) <[email protected]>
ARM: Fix kgdb breakpoint for Thumb2

Corinna Vinschen <[email protected]>
igc: igc_read_phy_reg_gpy: drop premature return

Brian Norris <[email protected]>
arm64: dts: rockchip: Switch RK3399-Gru DP to SPDIF output

Vincent Mailhol <[email protected]>
can: gs_usb: change active_channels's type from atomic_t to u8

Fabio Estevam <[email protected]>
ASoC: cs4265: Fix the duplicated control name

Alyssa Ross <[email protected]>
firmware: arm_scmi: Remove space in MODULE_ALIAS name

Jann Horn <[email protected]>
efivars: Respect "block" flag in efivar_entry_set_safe()

Maciej Fijalkowski <[email protected]>
ixgbe: xsk: change !netif_carrier_ok() handling in ixgbe_xmit_zc()

Zheyu Ma <[email protected]>

    net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe()

Randy Dunlap <[email protected]>
net: sxgbe: fix return value of __setup handler

Slawomir Laba <[email protected]>
iavf: Fix missing check for running netdev

Randy Dunlap <[email protected]>
net: stmmac: fix return value of __setup handler

Nicolas Escande <[email protected]>
mac80211: fix forwarded mesh frames AC & queue selection

Valentin Schneider <[email protected]>
ia64: ensure proper NUMA distance and possible map initialization

Dietmar Eggemann <[email protected]>
sched/topology: Fix sched_domain_topology_level alloc in sched_init_numa()

Valentin Schneider <[email protected]>
sched/topology: Make sched_init_numa() use a set for the deduplicating sort

Marek Marczykowski-Górecki <[email protected]>
xen/netfront: destroy queues before real_num_tx_queues is zeroed

Ye Bin <[email protected]>
block: Fix fsync always failed if once failed

D. Wythe <[email protected]>
net/smc: fix unexpected SMC_CLC_DECL_ERR_REGRMB error cause by server

D. Wythe <[email protected]>
net/smc: fix unexpected SMC_CLC_DECL_ERR_REGRMB error generated by client

Vladimir Oltean <[email protected]>
net: dcb: flush lingering app table entries for unregistered devices

Sven Eckelmann <[email protected]>
batman-adv: Don't expect inter-netns unique iflink indices

Sven Eckelmann <[email protected]>
batman-adv: Request iflink once in batadv_get_real_netdevice

Sven Eckelmann <[email protected]>
batman-adv: Request iflink once in batadv-on-batadv check

Florian Westphal <[email protected]>
netfilter: nf_queue: fix possible use-after-free

Florian Westphal <[email protected]>
netfilter: nf_queue: don't assume sk is full socket

Leon Romanovsky <[email protected]>
xfrm: enforce validity of offload input flags

Antony Antony <[email protected]>
xfrm: fix the if_id check in changelink

Eric Dumazet <[email protected]>
netfilter: fix use-after-free in __nf_register_net_hook()

Jiri Bohac <[email protected]>
xfrm: fix MTU regression

Marek Vasut <[email protected]>
ASoC: ops: Shift tested values in snd_soc_put_volsw() by +min

Zhen Ni <[email protected]>
ALSA: intel_hdmi: Fix reference to PCM buffer address

Sergey Shtylyov <[email protected]>
ata: pata_hpt37x: fix PCI clock detection

Hangyu Hua <[email protected]>
usb: gadget: clear related members when goto fail

Hangyu Hua <[email protected]>

    usb: gadget: don't release an existing dev->buf

Daniele Palmas <[email protected]>
net: usb: cdc_mbim: avoid altsetting toggling for Telit FN990

Wolfram Sang <[email protected]>
i2c: qup: allow COMPILE_TEST

Wolfram Sang <[email protected]>
i2c: cadence: allow COMPILE_TEST

Yongzhi Liu <[email protected]>
dmaengine: shdma: Fix runtime PM imbalance on error

Ronnie Sahlberg <[email protected]>
cifs: fix double free race when mount fails in cifs_get_root()

José Expósito <[email protected]>
Input: clear BTN_RIGHT/MIDDLE on buttonpads

Kai Vehmanen <[email protected]>
ASoC: rt5682: do not block workqueue if card is unbound

Kai Vehmanen <[email protected]>
ASoC: rt5668: do not block workqueue if card is unbound

Eric Anholt <[email protected]>
i2c: bcm2835: Avoid clock stretching timeouts

JaeMan Park <[email protected]>

    mac80211_hwsim: initialize ieee80211_tx_info at hw_scan_work

Benjamin Beichler <[email protected]>
mac80211_hwsim: report NOACK frames in tx_status

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

Diffstat:

 Makefile                                          |  4 +-
 arch/arm/kernel/kgdb.c                            | 36 +++++++--
 arch/arm/mm/mmu.c                                 |  2 +
 arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi      | 17 ++--
 arch/ia64/kernel/acpi.c                           |  7 +-
 block/blk-flush.c                                 |  4 +-
 drivers/ata/pata_hpt37x.c                         |  4 +-
 drivers/dma/sh/shdma-base.c                       |  4 +-
 drivers/firmware/arm_scmi/driver.c                |  2 +-
 drivers/firmware/efi/vars.c                       |  5 +-
 drivers/hid/hid-debug.c                           |  5 +-
 drivers/hid/hid-input.c                           |  3 +
 drivers/i2c/busses/Kconfig                        |  4 +-
 drivers/i2c/busses/i2c-bcm2835.c                  | 11 +++
 drivers/input/input.c                             |  6 ++
 drivers/input/mouse/elan_i2c_core.c               | 64 ++++++---------
 drivers/net/arcnet/com20020-pci.c                 |  3 +
 drivers/net/can/usb/gs_usb.c                      | 10 +--
 drivers/net/ethernet/chelsio/cxgb3/t3_hw.c        |  2 +
 drivers/net/ethernet/ibm/ibmvnic.c                |  4 +-
 drivers/net/ethernet/intel/iavf/iavf_main.c       |  7 +-
 drivers/net/ethernet/intel/igc/igc_phy.c          |  4 -
 drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c      |  6 +-
 drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c   |  6 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |  6 +-
 drivers/net/usb/cdc_mbim.c                        |  5 ++
 drivers/net/wireless/mac80211_hwsim.c             | 13 +++
 drivers/net/xen-netfront.c                        | 39 +++++----
 drivers/soc/fsl/qe/qe_io.c                        |  2 +
 drivers/usb/gadget/legacy/inode.c                 | 10 ++-
 fs/btrfs/qgroup.c                                 |  9 ++-
 fs/btrfs/tree-log.c                               | 61 +++++++++++---
 fs/cifs/cifsfs.c                                  |  1 +
 include/linux/topology.h                          |  1 +
 include/net/netfilter/nf_queue.h                  |  2 +-
 include/net/xfrm.h                                |  1 -
 include/uapi/linux/input-event-codes.h            |  4 +-
 include/uapi/linux/xfrm.h                         |  6 ++
 kernel/sched/topology.c                           | 99 +++++++++++------------
 kernel/trace/trace.c                              |  4 +-
 kernel/trace/trace_events_hist.c                  |  6 +-
 kernel/trace/trace_kprobe.c                       |  2 +-
 mm/memfd.c                                        | 40 ++++++---
 net/batman-adv/hard-interface.c                   | 29 ++++---
 net/dcb/dcbnl.c                                   | 44 ++++++++++
 net/ipv4/esp4.c                                   |  2 +-
 net/ipv6/esp6.c                                   |  2 +-
 net/ipv6/ip6_output.c                             | 11 ++-
 net/mac80211/rx.c                                 |  4 +-
 net/netfilter/core.c                              |  5 +-
 net/netfilter/nf_queue.c                          | 24 ++++--
 net/netfilter/nfnetlink_queue.c                   | 12 ++-
 net/smc/smc_core.c                                |  5 +-
 net/wireless/nl80211.c                            | 12 +++
 net/xfrm/xfrm_device.c                            |  6 +-
 net/xfrm/xfrm_interface.c                         |  2 +-
 net/xfrm/xfrm_state.c                             | 14 +---
 sound/soc/codecs/cs4265.c                         |  3 +-
 sound/soc/codecs/rt5668.c                         | 12 +--
 sound/soc/codecs/rt5682.c                         | 12 +--
 sound/soc/soc-ops.c                               |  4 +-
 sound/x86/intel_hdmi_audio.c                      |  2 +-
 62 files changed, 487 insertions(+), 249 deletions(-)

From: Benjamin Beichler <[email protected]>

[ Upstream commit 42a79960ffa50bfe9e0bf5d6280be89bf563a5dd ]

Add IEEE80211_TX_STAT_NOACK_TRANSMITTED to tx_status flags to have proper statistics for non-acked frames.

---
 drivers/net/wireless/mac80211_hwsim.c | 4 ++++
 1 file changed, 4 insertions(+)

index 07b070b14d75d..cfd97fe92d468 100644
@@ -3316,6 +3316,10 @@ static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
 		}
 		txi->flags |= IEEE80211_TX_STAT_ACK;
 	}
+
+	if (hwsim_flags & HWSIM_TX_CTL_NO_ACK)
+		txi->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
+
 	ieee80211_tx_status_irqsafe(data2->hw, skb);
 	return 0;
 out:

2.34.1

From: JaeMan Park <[email protected]>

[ Upstream commit cacfddf82baf1470e5741edeecb187260868f195 ]

In mac80211_hwsim, the probe_req frame is created and sent while scanning. It is sent with ieee80211_tx_info which is not initialized. Uninitialized ieee80211_tx_info can cause problems when using mac80211_hwsim with wmediumd. wmediumd checks the tx_rates field of ieee80211_tx_info and doesn't relay probe_req frame to other clients even if it is a broadcasting message.

Call ieee80211_tx_prepare_skb() to initialize ieee80211_tx_info for the probe_req that is created by hw_scan_work in mac80211_hwsim.

---
 drivers/net/wireless/mac80211_hwsim.c | 9 +++++++++
 1 file changed, 9 insertions(+)

index cfd97fe92d468..6e1721d533846 100644
@@ -2062,6 +2062,15 @@ static void hw_scan_work(struct work_struct *work)
 			if (req->ie_len)
 				skb_put_data(probe, req->ie, req->ie_len);
 
+			if (!ieee80211_tx_prepare_skb(hwsim->hw,
+						      hwsim->hw_scan_vif,
+						      probe,
+						      hwsim->tmp_chan->band,
+						      NULL)) {
+				kfree_skb(probe);
+				continue;
+			}
+
 			local_bh_disable();
 			mac80211_hwsim_tx_frame(hwsim->hw, probe,
 						hwsim->tmp_chan);

2.34.1

From: Eric Anholt <[email protected]>

[ Upstream commit 9495b9b31abe525ebd93da58de2c88b9f66d3a0e ]

The CLKT register contains at poweron 0x40, which at our typical 100kHz bus rate means .64ms. But there is no specified limit to how long devices should be able to stretch the clocks, so just disable the timeout. We still have a timeout wrapping the entire transfer.

---
 drivers/i2c/busses/i2c-bcm2835.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

index 5ab901ad615dd..c265fe4621621 100644
@@ -23,6 +23,11 @@
 #define BCM2835_I2C_FIFO	0x10
 #define BCM2835_I2C_DIV		0x14
 #define BCM2835_I2C_DEL		0x18
+/*
+ * 16-bit field for the number of SCL cycles to wait after rising SCL
+ * before deciding the slave is not responding. 0 disables the
+ * timeout detection.
+ */
 #define BCM2835_I2C_CLKT	0x1c
 
 #define BCM2835_I2C_C_READ	BIT(0)

@@ -479,6 +484,12 @@ static int bcm2835_i2c_probe(struct platform_device *pdev)
 	adap->dev.of_node = pdev->dev.of_node;
 	adap->quirks = of_device_get_match_data(&pdev->dev);
 
+	/*
+	 * Disable the hardware clock stretching timeout. SMBUS
+	 * specifies a limit for how long the device can stretch the
+	 * clock, but core I2C doesn't.
+	 */
+	bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_CLKT, 0);
 	bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_C, 0);
 
 	ret = i2c_add_adapter(adap);

2.34.1

From: Kai Vehmanen <[email protected]>

[ Upstream commit a6d78661dc903d90a327892bbc34268f3a5f4b9c ]

The current rt5668_jack_detect_handler() assumes the component and card will always show up and implements an infinite usleep loop waiting for them to show up.

This does not hold true if a codec interrupt (or other event) occurs when the card is unbound. The codec driver's remove or shutdown functions cannot cancel the workqueue due to the wait loop. As a result, code can either end up blocking the workqueue, or hit a kernel oops when the card is freed.

Fix the issue by rescheduling the jack detect handler in case the card is not ready. In case card never shows up, the shutdown/remove/suspend calls can now cancel the detect task.

---
 sound/soc/codecs/rt5668.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

index 5716cede99cb4..acc2b34ca334a 100644
@@ -1022,11 +1022,13 @@ static void rt5668_jack_detect_handler(struct work_struct *work)
 		container_of(work, struct rt5668_priv, jack_detect_work.work);
 	int val, btn_type;
 
-	while (!rt5668->component)
-		usleep_range(10000, 15000);
-
-	while (!rt5668->component->card->instantiated)
-		usleep_range(10000, 15000);
+	if (!rt5668->component || !rt5668->component->card ||
+	    !rt5668->component->card->instantiated) {
+		/* card not yet ready, try later */
+		mod_delayed_work(system_power_efficient_wq,
+				 &rt5668->jack_detect_work, msecs_to_jiffies(15));
+		return;
+	}
 
 	mutex_lock(&rt5668->calibrate_mutex);
 

2.34.1

From: Kai Vehmanen <[email protected]>

[ Upstream commit 4c33de0673ced9c7c37b3bbd9bfe0fda72340b2a ]

The current rt5682_jack_detect_handler() assumes the component and card will always show up and implements an infinite usleep loop waiting for them to show up.

This does not hold true if a codec interrupt (or other event) occurs when the card is unbound. The codec driver's remove or shutdown functions cannot cancel the workqueue due to the wait loop. As a result, code can either end up blocking the workqueue, or hit a kernel oops when the card is freed.

Fix the issue by rescheduling the jack detect handler in case the card is not ready. In case card never shows up, the shutdown/remove/suspend calls can now cancel the detect task.

---
 sound/soc/codecs/rt5682.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

index 05e883a65d7a7..a8cf4c7451304 100644
@@ -1052,11 +1052,13 @@ static void rt5682_jack_detect_handler(struct work_struct *work)
 		container_of(work, struct rt5682_priv, jack_detect_work.work);
 	int val, btn_type;
 
-	while (!rt5682->component)
-		usleep_range(10000, 15000);
-
-	while (!rt5682->component->card->instantiated)
-		usleep_range(10000, 15000);
+	if (!rt5682->component || !rt5682->component->card ||
+	    !rt5682->component->card->instantiated) {
+		/* card not yet ready, try later */
+		mod_delayed_work(system_power_efficient_wq,
+				 &rt5682->jack_detect_work, msecs_to_jiffies(15));
+		return;
+	}
 
 	mutex_lock(&rt5682->calibrate_mutex);
 

2.34.1

From: José Expósito <[email protected]>

[ Upstream commit 37ef4c19b4c659926ce65a7ac709ceaefb211c40 ]

Buttonpads are expected to map the INPUT_PROP_BUTTONPAD property bit and the BTN_LEFT key bit.

As explained in the specification, where a device has a button type value of 0 (click-pad) or 1 (pressure-pad) there should not be discrete buttons:
https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/touchpad-windows-precision-touchpad-collection#device-capabilities-feature-report

However, some drivers map the BTN_RIGHT and/or BTN_MIDDLE key bits even though the device is a buttonpad and therefore does not have those buttons.

This behavior has forced userspace applications like libinput to implement different workarounds and quirks to detect buttonpads and offer to the user the right set of features and configuration options. For more information:
https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/726

In order to avoid this issue clear the BTN_RIGHT and BTN_MIDDLE key bits when the input device is register if the INPUT_PROP_BUTTONPAD property bit is set.

Notice that this change will not affect udev because it does not check for buttons. See systemd/src/udev/udev-builtin-input_id.c.

List of known affected hardware:

- Chuwi AeroBook Plus
- Chuwi Gemibook
- Framework Laptop
- GPD Win Max
- Huawei MateBook 2020
- Prestigio Smartbook 141 C2
- Purism Librem 14v1

 - StarLite Mk II   - AMI firmware
 - StarLite Mk II   - Coreboot firmware
 - StarLite Mk III  - AMI firmware
 - StarLite Mk III  - Coreboot firmware

- StarLabTop Mk IV - AMI firmware
- StarLabTop Mk IV - Coreboot firmware
- StarBook Mk V

---
 drivers/input/input.c | 6 ++++++
 1 file changed, 6 insertions(+)

index e2eb9b9b8363d..f7398b996bacf 100644
@@ -2181,6 +2181,12 @@ int input_register_device(struct input_dev *dev)
 	/* KEY_RESERVED is not supposed to be transmitted to userspace. */
 	__clear_bit(KEY_RESERVED, dev->keybit);
 
+	/* Buttonpads should not map BTN_RIGHT and/or BTN_MIDDLE. */
+	if (test_bit(INPUT_PROP_BUTTONPAD, dev->propbit)) {
+		__clear_bit(BTN_RIGHT, dev->keybit);
+		__clear_bit(BTN_MIDDLE, dev->keybit);
+	}
+
 	/* Make sure that bitmasks not mentioned in dev->evbit are clean. */
 	input_cleanse_bitmasks(dev);
 

2.34.1

From: Ronnie Sahlberg <[email protected]>

[ Upstream commit 3d6cc9898efdfb062efb74dc18cfc700e082f5d5 ]

When cifs_get_root() fails during cifs_smb3_do_mount() we call deactivate_locked_super() which eventually will call delayed_free() which will free the context.
In this situation we should not proceed to enter the out: section in cifs_smb3_do_mount() and free the same resources a second time.

[Thu Feb 10 12:59:06 2022] BUG: KASAN: use-after-free in rcu_cblist_dequeue+0x32/0x60
[Thu Feb 10 12:59:06 2022] Read of size 8 at addr ffff888364f4d110 by task swapper/1/0

[Thu Feb 10 12:59:06 2022] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G           OE     5.17.0-rc3+ #4
[Thu Feb 10 12:59:06 2022] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.0 12/17/2019
[Thu Feb 10 12:59:06 2022] Call Trace:
[Thu Feb 10 12:59:06 2022]  <IRQ>
[Thu Feb 10 12:59:06 2022]  dump_stack_lvl+0x5d/0x78
[Thu Feb 10 12:59:06 2022]  print_address_description.constprop.0+0x24/0x150
[Thu Feb 10 12:59:06 2022]  ? rcu_cblist_dequeue+0x32/0x60
[Thu Feb 10 12:59:06 2022]  kasan_report.cold+0x7d/0x117
[Thu Feb 10 12:59:06 2022]  ? rcu_cblist_dequeue+0x32/0x60
[Thu Feb 10 12:59:06 2022]  __asan_load8+0x86/0xa0
[Thu Feb 10 12:59:06 2022]  rcu_cblist_dequeue+0x32/0x60
[Thu Feb 10 12:59:06 2022]  rcu_core+0x547/0xca0
[Thu Feb 10 12:59:06 2022]  ? call_rcu+0x3c0/0x3c0
[Thu Feb 10 12:59:06 2022]  ? __this_cpu_preempt_check+0x13/0x20
[Thu Feb 10 12:59:06 2022]  ? lock_is_held_type+0xea/0x140
[Thu Feb 10 12:59:06 2022]  rcu_core_si+0xe/0x10
[Thu Feb 10 12:59:06 2022]  __do_softirq+0x1d4/0x67b
[Thu Feb 10 12:59:06 2022]  __irq_exit_rcu+0x100/0x150
[Thu Feb 10 12:59:06 2022]  irq_exit_rcu+0xe/0x30
[Thu Feb 10 12:59:06 2022]  sysvec_hyperv_stimer0+0x9d/0xc0
...
[Thu Feb 10 12:59:07 2022] Freed by task 58179:
[Thu Feb 10 12:59:07 2022]  kasan_save_stack+0x26/0x50
[Thu Feb 10 12:59:07 2022]  kasan_set_track+0x25/0x30
[Thu Feb 10 12:59:07 2022]  kasan_set_free_info+0x24/0x40
[Thu Feb 10 12:59:07 2022]  ____kasan_slab_free+0x137/0x170
[Thu Feb 10 12:59:07 2022]  __kasan_slab_free+0x12/0x20
[Thu Feb 10 12:59:07 2022]  slab_free_freelist_hook+0xb3/0x1d0
[Thu Feb 10 12:59:07 2022]  kfree+0xcd/0x520
[Thu Feb 10 12:59:07 2022]  cifs_smb3_do_mount+0x149/0xbe0 [cifs]
[Thu Feb 10 12:59:07 2022]  smb3_get_tree+0x1a0/0x2e0 [cifs]
[Thu Feb 10 12:59:07 2022]  vfs_get_tree+0x52/0x140
[Thu Feb 10 12:59:07 2022]  path_mount+0x635/0x10c0
[Thu Feb 10 12:59:07 2022]  __x64_sys_mount+0x1bf/0x210
[Thu Feb 10 12:59:07 2022]  do_syscall_64+0x5c/0xc0
[Thu Feb 10 12:59:07 2022]  entry_SYSCALL_64_after_hwframe+0x44/0xae

[Thu Feb 10 12:59:07 2022] Last potentially related work creation:
[Thu Feb 10 12:59:07 2022]  kasan_save_stack+0x26/0x50
[Thu Feb 10 12:59:07 2022]  __kasan_record_aux_stack+0xb6/0xc0
[Thu Feb 10 12:59:07 2022]  kasan_record_aux_stack_noalloc+0xb/0x10
[Thu Feb 10 12:59:07 2022]  call_rcu+0x76/0x3c0
[Thu Feb 10 12:59:07 2022]  cifs_umount+0xce/0xe0 [cifs]
[Thu Feb 10 12:59:07 2022]  cifs_kill_sb+0xc8/0xe0 [cifs]
[Thu Feb 10 12:59:07 2022]  deactivate_locked_super+0x5d/0xd0
[Thu Feb 10 12:59:07 2022]  cifs_smb3_do_mount+0xab9/0xbe0 [cifs]
[Thu Feb 10 12:59:07 2022]  smb3_get_tree+0x1a0/0x2e0 [cifs]
[Thu Feb 10 12:59:07 2022]  vfs_get_tree+0x52/0x140
[Thu Feb 10 12:59:07 2022]  path_mount+0x635/0x10c0
[Thu Feb 10 12:59:07 2022]  __x64_sys_mount+0x1bf/0x210
[Thu Feb 10 12:59:07 2022]  do_syscall_64+0x5c/0xc0
[Thu Feb 10 12:59:07 2022]  entry_SYSCALL_64_after_hwframe+0x44/0xae

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

index 41b3c5fc958c7..f44b6f9d07776 100644
@@ -855,6 +855,7 @@ cifs_smb3_do_mount(struct file_system_type *fs_type,
 
 out_super:
 	deactivate_locked_super(sb);
+	return root;
 out:
 	cifs_cleanup_volume_info(volume_info);
 	return root;

2.34.1

From: Yongzhi Liu <[email protected]>

[ Upstream commit 455896c53d5b803733ddd84e1bf8a430644439b6 ]

pm_runtime_get_() increments the runtime PM usage counter even when it returns an error code, thus a matching decrement is needed on the error handling path to keep the counter balanced.

---
 drivers/dma/sh/shdma-base.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

index c51de498b5b4b..19eee3d0900b0 100644
@@ -115,8 +115,10 @@ static dma_cookie_t shdma_tx_submit(struct dma_async_tx_descriptor *tx)
 		ret = pm_runtime_get(schan->dev);
 
 		spin_unlock_irq(&schan->chan_lock);
-		if (ret < 0)
+		if (ret < 0) {
 			dev_err(schan->dev, "%s(): GET = %d\n", __func__, ret);
+			pm_runtime_put(schan->dev);
+		}
 
 		pm_runtime_barrier(schan->dev);
 

2.34.1

From: Wolfram Sang <[email protected]>

[ Upstream commit 0b0dcb3882c8f08bdeafa03adb4487e104d26050 ]

Driver builds fine with COMPILE_TEST. Enable it for wider test coverage and easier maintenance.

---
 drivers/i2c/busses/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 2d08a8719506c..94c78329f841c 100644
@@ -483,7 +483,7 @@ config I2C_BRCMSTB
 
 config I2C_CADENCE
 	tristate "Cadence I2C Controller"
-	depends on ARCH_ZYNQ || ARM64 || XTENSA
+	depends on ARCH_ZYNQ || ARM64 || XTENSA || COMPILE_TEST
 	help
 	  Say yes here to select Cadence I2C Host Controller. This controller is
 	  e.g. used by Xilinx Zynq.

2.34.1

From: Wolfram Sang <[email protected]>

[ Upstream commit 5de717974005fcad2502281e9f82e139ca91f4bb ]

Driver builds fine with COMPILE_TEST. Enable it for wider test coverage and easier maintenance.

---
 drivers/i2c/busses/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 94c78329f841c..854f1b2658b82 100644
@@ -894,7 +894,7 @@ config I2C_QCOM_GENI
 
 config I2C_QUP
 	tristate "Qualcomm QUP based I2C controller"
-	depends on ARCH_QCOM
+	depends on ARCH_QCOM || COMPILE_TEST
 	help
 	  If you say yes to this option, support will be included for the
 	  built-in I2C interface on the Qualcomm SoCs.

2.34.1

From: Daniele Palmas <[email protected]>

[ Upstream commit 21e8a96377e6b6debae42164605bf9dcbe5720c5 ]

Add quirk CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE for Telit FN990 0x1071 composition in order to avoid bind error.

---
 drivers/net/usb/cdc_mbim.c | 5 +++++
 1 file changed, 5 insertions(+)

index 77ac5a721e7b6..414341c9cf5ae 100644
@@ -658,6 +658,11 @@ static const struct usb_device_id mbim_devs[] = {
 	  .driver_info = (unsigned long)&cdc_mbim_info_avoid_altsetting_toggle,
 	},
 
+	/* Telit FN990 */
+	{ USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x1071, USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
+	  .driver_info = (unsigned long)&cdc_mbim_info_avoid_altsetting_toggle,
+	},
+
 	/* default entry */
 	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
 	  .driver_info = (unsigned long)&cdc_mbim_info_zlp,

2.34.1

From: Hangyu Hua <[email protected]>

commit 89f3594d0de58e8a57d92d497dea9fee3d4b9cda upstream.

dev->buf does not need to be released if it already exists before executing dev_config.

---
 drivers/usb/gadget/legacy/inode.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -1829,8 +1829,9 @@ dev_config (struct file *fd, const char
 	spin_lock_irq (&dev->lock);
 	value = -EINVAL;
 	if (dev->buf) {
+		spin_unlock_irq(&dev->lock);
 		kfree(kbuf);
-		goto fail;
+		return value;
 	}
 	dev->buf = kbuf;
 

From: Hangyu Hua <[email protected]>

commit 501e38a5531efbd77d5c73c0ba838a889bfc1d74 upstream.

dev->config and dev->hs_config and dev->dev need to be cleaned if dev_config fails to avoid UAF.

---
 drivers/usb/gadget/legacy/inode.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

@@ -1878,8 +1878,8 @@ dev_config (struct file *fd, const char
 
 	value = usb_gadget_probe_driver(&gadgetfs_driver);
 	if (value != 0) {
-		kfree (dev->buf);
-		dev->buf = NULL;
+		spin_lock_irq(&dev->lock);
+		goto fail;
 	} else {
 		/* at this point "good" hardware has for the first time
 		 * let the USB the host see us.  alternatively, if users

@@ -1896,6 +1896,9 @@ dev_config (struct file *fd, const char
 	return value;
 
 fail:
+	dev->config = NULL;
+	dev->hs_config = NULL;
+	dev->dev = NULL;
 	spin_unlock_irq (&dev->lock);
 	pr_debug ("%s: %s fail %zd, %p\n", shortname, __func__, value, dev);
 	kfree (dev->buf);

From: Sergey Shtylyov <[email protected]>

[ Upstream commit 5f6b0f2d037c8864f20ff15311c695f65eb09db5 ]

The f_CNT register (at the PCI config. address 0x78) is 16-bit, not 8-bit! The bug was there from the very start... :-(

---
 drivers/ata/pata_hpt37x.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 499a947d56ddb..fef46de2f6b23 100644
@@ -962,14 +962,14 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 
 	if ((freq >> 12) != 0xABCDE) {
 		int i;
-		u8 sr;
+		u16 sr;
 		u32 total = 0;
 
 		pr_warn("BIOS has not set timing clocks\n");
 
 		/* This is the process the HPT371 BIOS is reported to use */
 		for (i = 0; i < 128; i++) {
-			pci_read_config_byte(dev, 0x78, &sr);
+			pci_read_config_word(dev, 0x78, &sr);
 			total += sr & 0x1FF;
 			udelay(15);
 		}

2.34.1

From: Zhen Ni <[email protected]>

commit 0aa6b294b312d9710804679abd2c0c8ca52cc2bc upstream.

PCM buffers might be allocated dynamically when the buffer preallocation failed or a larger buffer is requested, and it's not guaranteed that substream->dma_buffer points to the actually used buffer. The driver needs to refer to substream->runtime->dma_addr instead for the buffer address.

---
 sound/x86/intel_hdmi_audio.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -1279,7 +1279,7 @@ static int had_pcm_mmap(struct snd_pcm_s
 {
 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 	return remap_pfn_range(vma, vma->vm_start,
-			substream->dma_buffer.addr >> PAGE_SHIFT,
+			substream->runtime->dma_addr >> PAGE_SHIFT,
 			vma->vm_end - vma->vm_start, vma->vm_page_prot);
 }
 

From: Marek Vasut <[email protected]>

commit 9bdd10d57a8807dba0003af0325191f3cec0f11c upstream.

While the $val/$val2 values passed in from userspace are always >= 0 integers, the limits of the control can be signed integers and the $min can be non-zero and less than zero. To correctly validate $val/$val2 against platform_max, add the $min offset to val first.

---
 sound/soc/soc-ops.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -323,7 +323,7 @@ int snd_soc_put_volsw(struct snd_kcontro
 		mask = BIT(sign_bit + 1) - 1;
 
 	val = ucontrol->value.integer.value[0];
-	if (mc->platform_max && val > mc->platform_max)
+	if (mc->platform_max && ((int)val + min) > mc->platform_max)
 		return -EINVAL;
 	if (val > max - min)
 		return -EINVAL;

@@ -336,7 +336,7 @@ int snd_soc_put_volsw(struct snd_kcontro
 	val = val << shift;
 	if (snd_soc_volsw_is_stereo(mc)) {
 		val2 = ucontrol->value.integer.value[1];
-		if (mc->platform_max && val2 > mc->platform_max)
+		if (mc->platform_max && ((int)val2 + min) > mc->platform_max)
 			return -EINVAL;
 		if (val2 > max - min)
 			return -EINVAL;

From: Jiri Bohac <[email protected]>

commit 6596a0229541270fb8d38d989f91b78838e5e9da upstream.

Commit 749439bfac6e1a2932c582e2699f91d329658196 ("ipv6: fix udpv6 sendmsg crash caused by too small MTU") breaks PMTU for xfrm.

A Packet Too Big ICMPv6 message received in response to an ESP packet will prevent all further communication through the tunnel if the reported MTU minus the ESP overhead is smaller than 1280.

E.g. in a case of a tunnel-mode ESP with sha256/aes the overhead is 92 bytes. Receiving a PTB with MTU of 1371 or less will result in all further packets in the tunnel dropped. A ping through the tunnel fails with "ping: sendmsg: Invalid argument".

Apparently the MTU on the xfrm route is smaller than 1280 and fails the check inside ip6_setup_cork() added by 749439bf.

We found this by debugging USGv6/ipv6ready failures. Failing tests are: "Phase-2 Interoperability Test Scenario IPsec" / 5.3.11 and 5.4.11 (Tunnel Mode: Fragmentation).

Commit b515d2637276a3810d6595e10ab02c13bfd0b63a ("xfrm:
xfrm_state_mtu should return at least 1280 for ipv6") attempted to fix this but caused another regression in TCP MSS calculations and had to be reverted.

The patch below fixes the situation by dropping the MTU check and instead checking for the underflows described in the 749439bf commit message.

---
 net/ipv6/ip6_output.c |   11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

@@ -1361,8 +1361,6 @@ static int ip6_setup_cork(struct sock *s
 		if (np->frag_size)
 			mtu = np->frag_size;
 	}
-	if (mtu < IPV6_MIN_MTU)
-		return -EINVAL;
 	cork->base.fragsize = mtu;
 	cork->base.gso_size = ipc6->gso_size;
 	cork->base.tx_flags = 0;

@@ -1424,8 +1422,6 @@ static int __ip6_append_data(struct sock
 
 	fragheaderlen = sizeof(struct ipv6hdr) + rt->rt6i_nfheader_len +
 			(opt ? opt->opt_nflen : 0);
-	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen -
-		     sizeof(struct frag_hdr);
 
 	headersize = sizeof(struct ipv6hdr) +
 		     (opt ? opt->opt_flen + opt->opt_nflen : 0) +

@@ -1433,6 +1429,13 @@ static int __ip6_append_data(struct sock
 		      sizeof(struct frag_hdr) : 0) +
 		     rt->rt6i_nfheader_len;
 
+	if (mtu < fragheaderlen ||
+	    ((mtu - fragheaderlen) & ~7) + fragheaderlen < sizeof(struct frag_hdr))
+		goto emsgsize;
+
+	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen -
+		     sizeof(struct frag_hdr);
+
 	/* as per RFC 7112 section 5, the entire IPv6 Header Chain must fit
 	 * the first fragment
 	 */

From: Eric Dumazet <[email protected]>

commit 56763f12b0f02706576a088e85ef856deacc98a0 upstream.

We must not dereference @new_hooks after nf_hook_mutex has been released, because other threads might have freed our allocated hooks already.

BUG: KASAN: use-after-free in nf_hook_entries_get_hook_ops include/linux/netfilter.h:130 [inline]
BUG: KASAN: use-after-free in hooks_validate net/netfilter/core.c:171 [inline]
BUG: KASAN: use-after-free in __nf_register_net_hook+0x77a/0x820 net/netfilter/core.c:438
Read of size 2 at addr ffff88801c1a8000 by task syz-executor237/4430

CPU: 1 PID: 4430 Comm: syz-executor237 Not tainted 5.17.0-rc5-syzkaller-00306-g2293be58d6a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description.constprop.0.cold+0x8d/0x336 mm/kasan/report.c:255
 __kasan_report mm/kasan/report.c:442 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
 nf_hook_entries_get_hook_ops include/linux/netfilter.h:130 [inline]
 hooks_validate net/netfilter/core.c:171 [inline]
 __nf_register_net_hook+0x77a/0x820 net/netfilter/core.c:438
 nf_register_net_hook+0x114/0x170 net/netfilter/core.c:571
 nf_register_net_hooks+0x59/0xc0 net/netfilter/core.c:587
 nf_synproxy_ipv6_init+0x85/0xe0 net/netfilter/nf_synproxy_core.c:1218
 synproxy_tg6_check+0x30d/0x560 net/ipv6/netfilter/ip6t_SYNPROXY.c:81
 xt_check_target+0x26c/0x9e0 net/netfilter/x_tables.c:1038
 check_target net/ipv6/netfilter/ip6_tables.c:530 [inline]
 find_check_entry.constprop.0+0x7f1/0x9e0 net/ipv6/netfilter/ip6_tables.c:573
 translate_table+0xc8b/0x1750 net/ipv6/netfilter/ip6_tables.c:735
 do_replace net/ipv6/netfilter/ip6_tables.c:1153 [inline]
 do_ip6t_set_ctl+0x56e/0xb90 net/ipv6/netfilter/ip6_tables.c:1639
 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
 ipv6_setsockopt+0x122/0x180 net/ipv6/ipv6_sockglue.c:1024
 rawv6_setsockopt+0xd3/0x6a0 net/ipv6/raw.c:1084
 __sys_setsockopt+0x2db/0x610 net/socket.c:2180
 __do_sys_setsockopt net/socket.c:2191 [inline]
 __se_sys_setsockopt net/socket.c:2188 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2188
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f65a1ace7d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f65a1a7f308 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f65a1ace7d9
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 00007f65a1b574c8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 00007f65a1b55130
R13: 00007f65a1b574c0 R14: 00007f65a1b24090 R15: 0000000000022000
 </TASK>

The buggy address belongs to the page:
page:ffffea0000706a00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c1a8
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea0001c1b108 ffffea000046dd08 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52dc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_ZERO), pid 4430, ts 1061781545818, free_ts 1061791488993
 prep_new_page mm/page_alloc.c:2434 [inline]
 get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389
 __alloc_pages_node include/linux/gfp.h:572 [inline]
 alloc_pages_node include/linux/gfp.h:595 [inline]
 kmalloc_large_node+0x62/0x130 mm/slub.c:4438
 __kmalloc_node+0x35a/0x4a0 mm/slub.c:4454
 kmalloc_node include/linux/slab.h:604 [inline]
 kvmalloc_node+0x97/0x100 mm/util.c:580
 kvmalloc include/linux/slab.h:731 [inline]
 kvzalloc include/linux/slab.h:739 [inline]
 allocate_hook_entries_size net/netfilter/core.c:61 [inline]
 nf_hook_entries_grow+0x140/0x780 net/netfilter/core.c:128
 __nf_register_net_hook+0x144/0x820 net/netfilter/core.c:429
 nf_register_net_hook+0x114/0x170 net/netfilter/core.c:571
 nf_register_net_hooks+0x59/0xc0 net/netfilter/core.c:587
 nf_synproxy_ipv6_init+0x85/0xe0 net/netfilter/nf_synproxy_core.c:1218
 synproxy_tg6_check+0x30d/0x560 net/ipv6/netfilter/ip6t_SYNPROXY.c:81
 xt_check_target+0x26c/0x9e0 net/netfilter/x_tables.c:1038
 check_target net/ipv6/netfilter/ip6_tables.c:530 [inline]
 find_check_entry.constprop.0+0x7f1/0x9e0 net/ipv6/netfilter/ip6_tables.c:573
 translate_table+0xc8b/0x1750 net/ipv6/netfilter/ip6_tables.c:735
 do_replace net/ipv6/netfilter/ip6_tables.c:1153 [inline]
 do_ip6t_set_ctl+0x56e/0xb90 net/ipv6/netfilter/ip6_tables.c:1639
 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1352 [inline]
 free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1404
 free_unref_page_prepare mm/page_alloc.c:3325 [inline]
 free_unref_page+0x19/0x690 mm/page_alloc.c:3404
 kvfree+0x42/0x50 mm/util.c:613
 rcu_do_batch kernel/rcu/tree.c:2527 [inline]
 rcu_core+0x7b1/0x1820 kernel/rcu/tree.c:2778
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558

Memory state around the buggy address:
 ffff88801c1a7f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801c1a7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88801c1a8000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88801c1a8080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801c1a8100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

---
 net/netfilter/core.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

@@ -336,14 +336,15 @@ static int __nf_register_net_hook(struct
 	p = nf_entry_dereference(*pp);
 	new_hooks = nf_hook_entries_grow(p, reg);
 
-	if (!IS_ERR(new_hooks))
+	if (!IS_ERR(new_hooks)) {
+		hooks_validate(new_hooks);
 		rcu_assign_pointer(*pp, new_hooks);
+	}
 
 	mutex_unlock(&nf_hook_mutex);
 	if (IS_ERR(new_hooks))
 		return PTR_ERR(new_hooks);
 
-	hooks_validate(new_hooks);
 #ifdef CONFIG_NETFILTER_INGRESS
 	if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
 		net_inc_ingress_queue();

From: Antony Antony <[email protected]>

commit 6d0d95a1c2b07270870e7be16575c513c29af3f1 upstream.

if_id will be always 0, because it was not yet initialized.

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

@@ -695,12 +695,12 @@ static int xfrmi_changelink(struct net_d
 	struct net *net = xi->net;
 	struct xfrm_if_parms p = {};
 
+	xfrmi_netlink_parms(data, &p);
 	if (!p.if_id) {
 		NL_SET_ERR_MSG(extack, "if_id must be non zero");
 		return -EINVAL;
 	}
 
-	xfrmi_netlink_parms(data, &p);
 	xi = xfrmi_locate(net, &p);
 	if (!xi) {
 		xi = netdev_priv(dev);

From: Leon Romanovsky <[email protected]>

commit 7c76ecd9c99b6e9a771d813ab1aa7fa428b3ade1 upstream.

struct xfrm_user_offload has flags variable that received user input, but kernel didn't check if valid bits were provided. It caused a situation where not sanitized input was forwarded directly to the drivers.

For example, XFRM_OFFLOAD_IPV6 define that was exposed, was used by strongswan, but not implemented in the kernel at all.

As a solution, check and sanitize input flags to forward XFRM_OFFLOAD_INBOUND to the drivers.

---
 include/uapi/linux/xfrm.h |    6 ++++++
 net/xfrm/xfrm_device.c    |    6 +++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

@@ -504,6 +504,12 @@ struct xfrm_user_offload {
 	int				ifindex;
 	__u8				flags;
 };
+/* This flag was exposed without any kernel code that supporting it.
+ * Unfortunately, strongswan has the code that uses sets this flag,
+ * which makes impossible to reuse this bit.
+ *
+ * So leave it here to make sure that it won't be reused by mistake.
+ */
 #define XFRM_OFFLOAD_IPV6	1
 #define XFRM_OFFLOAD_INBOUND	2
 

@@ -206,6 +206,9 @@ int xfrm_dev_state_add(struct net *net,
 	if (x->encap || x->tfcpad)
 		return -EINVAL;
 
+	if (xuo->flags & ~(XFRM_OFFLOAD_IPV6 | XFRM_OFFLOAD_INBOUND))
+		return -EINVAL;
+
 	dev = dev_get_by_index(net, xuo->ifindex);
 	if (!dev) {
 		if (!(xuo->flags & XFRM_OFFLOAD_INBOUND)) {

@@ -243,7 +246,8 @@ int xfrm_dev_state_add(struct net *net,
 
 	xso->dev = dev;
 	xso->num_exthdrs = 1;
-	xso->flags = xuo->flags;
+	/* Don't forward bit that is not implemented */
+	xso->flags = xuo->flags & ~XFRM_OFFLOAD_IPV6;
 
 	err = dev->xfrmdev_ops->xdo_dev_state_add(x);
 	if (err) {

From: Florian Westphal <[email protected]>

commit 747670fd9a2d1b7774030dba65ca022ba442ce71 upstream.

There is no guarantee that state->sk refers to a full socket.

If refcount transitions to 0, sock_put calls sk_free which then ends up with garbage fields.

I'd like to thank Oleksandr Natalenko and Jiri Benc for considerable debug work and pointing out state->sk oddities.

---
 net/netfilter/nf_queue.c |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

@@ -64,6 +64,15 @@ static void nf_queue_entry_release_br_nf
 #endif
 }
 
+static void nf_queue_sock_put(struct sock *sk)
+{
+#ifdef CONFIG_INET
+	sock_gen_put(sk);
+#else
+	sock_put(sk);
+#endif
+}
+
 void nf_queue_entry_release_refs(struct nf_queue_entry *entry)
 {
 	struct nf_hook_state *state = &entry->state;

@@ -74,7 +83,7 @@ void nf_queue_entry_release_refs(struct
 	if (state->out)
 		dev_put(state->out);
 	if (state->sk)
-		sock_put(state->sk);
+		nf_queue_sock_put(state->sk);
 
 	nf_queue_entry_release_br_nf_refs(entry->skb);
 }

From: Florian Westphal <[email protected]>

commit c3873070247d9e3c7a6b0cf9bf9b45e8018427b1 upstream.

Eric Dumazet says:
The sock_hold() side seems suspect, because there is no guarantee that sk_refcnt is not already 0.

On failure, we cannot queue the packet and need to indicate an error. The packet will be dropped by the caller.

v2: split skb prefetch hunk into separate change

---
 include/net/netfilter/nf_queue.h |    2 +-
 net/netfilter/nf_queue.c         |   13 +++++++++----
 net/netfilter/nfnetlink_queue.c  |   12 +++++++++---
 3 files changed, 19 insertions(+), 8 deletions(-)

@@ -34,7 +34,7 @@ void nf_register_queue_handler(struct ne
 void nf_unregister_queue_handler(struct net *net);
 void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict);
 
-void nf_queue_entry_get_refs(struct nf_queue_entry *entry);
+bool nf_queue_entry_get_refs(struct nf_queue_entry *entry);
 void nf_queue_entry_release_refs(struct nf_queue_entry *entry);
 
 static inline void init_hashrandom(u32 *jhash_initval)

@@ -108,18 +108,20 @@ static void nf_queue_entry_get_br_nf_ref
 }
 
 /* Bump dev refs so they don't vanish while packet is out */
-void nf_queue_entry_get_refs(struct nf_queue_entry *entry)
+bool nf_queue_entry_get_refs(struct nf_queue_entry *entry)
 {
 	struct nf_hook_state *state = &entry->state;
 
+	if (state->sk && !refcount_inc_not_zero(&state->sk->sk_refcnt))
+		return false;
+
 	if (state->in)
 		dev_hold(state->in);
 	if (state->out)
 		dev_hold(state->out);
-	if (state->sk)
-		sock_hold(state->sk);
 
 	nf_queue_entry_get_br_nf_refs(entry->skb);
+	return true;
 }
 EXPORT_SYMBOL_GPL(nf_queue_entry_get_refs);
 

@@ -210,7 +212,10 @@ static int __nf_queue(struct sk_buff *sk
 		.size	= sizeof(*entry) + route_key_size,
 	};
 
-	nf_queue_entry_get_refs(entry);
+	if (!nf_queue_entry_get_refs(entry)) {
+		kfree(entry);
+		return -ENOTCONN;
+	}
 
 	switch (entry->state.pf) {
 	case AF_INET:

@@ -712,9 +712,15 @@ static struct nf_queue_entry *
 nf_queue_entry_dup(struct nf_queue_entry *e)
 {
 	struct nf_queue_entry *entry = kmemdup(e, e->size, GFP_ATOMIC);
-	if (entry)
-		nf_queue_entry_get_refs(entry);
-	return entry;
+
+	if (!entry)
+		return NULL;
+
+	if (nf_queue_entry_get_refs(entry))
+		return entry;
+
+	kfree(entry);
+	return NULL;
 }
 
 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)

From: Sven Eckelmann <[email protected]>

commit 690bb6fb64f5dc7437317153902573ecad67593d upstream.

There is no need to call dev_get_iflink multiple times for the same net_device in batadv_is_on_batman_iface. And since some of the .ndo_get_iflink callbacks are dynamic (for example via RCUs like in vxcan_get_iflink), it could easily happen that the returned values are not stable. The pre-checks before __dev_get_by_index are then of course bogus.

---
 net/batman-adv/hard-interface.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

@@ -151,22 +151,23 @@ static bool batadv_is_on_batman_iface(co
 	struct net *net = dev_net(net_dev);
 	struct net_device *parent_dev;
 	struct net *parent_net;
+	int iflink;
 	bool ret;
 
 	/* check if this is a batman-adv mesh interface */
 	if (batadv_softif_is_valid(net_dev))
 		return true;
 
+	iflink = dev_get_iflink(net_dev);
+
 	/* no more parents..stop recursion */
-	if (dev_get_iflink(net_dev) == 0 ||
-	    dev_get_iflink(net_dev) == net_dev->ifindex)
+	if (iflink == 0 || iflink == net_dev->ifindex)
 		return false;
 
 	parent_net = batadv_getlink_net(net_dev, net);
 
 	/* recurse over the parent device */
-	parent_dev = __dev_get_by_index((struct net *)parent_net,
-					dev_get_iflink(net_dev));
+	parent_dev = __dev_get_by_index((struct net *)parent_net, iflink);
 	/* if we got a NULL parent_dev there is something broken.. */
 	if (!parent_dev) {
 		pr_err("Cannot find parent device\n");

From: Sven Eckelmann <[email protected]>

commit 6116ba09423f7d140f0460be6a1644dceaad00da upstream.

There is no need to call dev_get_iflink multiple times for the same net_device in batadv_get_real_netdevice. And since some of the ndo_get_iflink callbacks are dynamic (for example via RCUs like in vxcan_get_iflink), it could easily happen that the returned values are not stable. The pre-checks before __dev_get_by_index are then of course bogus.

---
 net/batman-adv/hard-interface.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

@@ -217,14 +217,16 @@ static struct net_device *batadv_get_rea
 	struct net_device *real_netdev = NULL;
 	struct net *real_net;
 	struct net *net;
-	int ifindex;
+	int iflink;
 
 	ASSERT_RTNL();
 
 	if (!netdev)
 		return NULL;
 
-	if (netdev->ifindex == dev_get_iflink(netdev)) {
+	iflink = dev_get_iflink(netdev);
+
+	if (netdev->ifindex == iflink) {
 		dev_hold(netdev);
 		return netdev;
 	}

@@ -234,9 +236,8 @@ static struct net_device *batadv_get_rea
 		goto out;
 
 	net = dev_net(hard_iface->soft_iface);
-	ifindex = dev_get_iflink(netdev);
 	real_net = batadv_getlink_net(netdev, net);
-	real_netdev = dev_get_by_index(real_net, ifindex);
+	real_netdev = dev_get_by_index(real_net, iflink);
 
 out:
 	if (hard_iface)

From: Sven Eckelmann <[email protected]>

commit 6c1f41afc1dbe59d9d3c8bb0d80b749c119aa334 upstream.

The ifindex doesn't have to be unique for multiple network namespaces on the same machine.

  $ ip netns add test1
  $ ip -net test1 link add dummy1 type dummy
  $ ip netns add test2
  $ ip -net test2 link add dummy2 type dummy

  $ ip -net test1 link show dev dummy1
  6: dummy1: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
      link/ether 96:81:55:1e:dd:85 brd ff:ff:ff:ff:ff:ff
  $ ip -net test2 link show dev dummy2
  6: dummy2: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
      link/ether 5a:3c:af:35:07:c3 brd ff:ff:ff:ff:ff:ff

But the batman-adv code to walk through the various layers of virtual interfaces uses this assumption because dev_get_iflink handles it internally and doesn't return the actual netns of the iflink. And dev_get_iflink only documents the situation where ifindex == iflink for physical devices.

But only checking for dev->netdev_ops->ndo_get_iflink is also not an option because ipoib_get_iflink implements it even when it sometimes returns an iflink != ifindex and sometimes iflink == ifindex. The caller must therefore make sure itself to check both netns and iflink + ifindex for equality. Only when they are equal, a "physical" interface was detected which should stop the traversal. On the other hand, vxcan_get_iflink can also return 0 in case there was currently no valid peer. In this case, it is still necessary to stop.

---
 net/batman-adv/hard-interface.c |   19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

@@ -159,13 +159,15 @@ static bool batadv_is_on_batman_iface(co
 		return true;
 
 	iflink = dev_get_iflink(net_dev);
-
-	/* no more parents..stop recursion */
-	if (iflink == 0 || iflink == net_dev->ifindex)
+	if (iflink == 0)
 		return false;
 
 	parent_net = batadv_getlink_net(net_dev, net);
 
+	/* iflink to itself, most likely physical device */
+	if (net == parent_net && iflink == net_dev->ifindex)
+		return false;
+
 	/* recurse over the parent device */
 	parent_dev = __dev_get_by_index((struct net *)parent_net, iflink);
 	/* if we got a NULL parent_dev there is something broken.. */

@@ -225,8 +227,7 @@ static struct net_device *batadv_get_rea
 		return NULL;
 
 	iflink = dev_get_iflink(netdev);
-
-	if (netdev->ifindex == iflink) {
+	if (iflink == 0) {
 		dev_hold(netdev);
 		return netdev;
 	}

@@ -237,6 +238,14 @@ static struct net_device *batadv_get_rea
 
 	net = dev_net(hard_iface->soft_iface);
 	real_net = batadv_getlink_net(netdev, net);
+
+	/* iflink to itself, most likely physical device */
+	if (net == real_net && netdev->ifindex == iflink) {
+		real_netdev = netdev;
+		dev_hold(real_netdev);
+		goto out;
+	}
+
 	real_netdev = dev_get_by_index(real_net, iflink);
 
 out:

From: Vladimir Oltean <[email protected]>

commit 91b0383fef06f20b847fa9e4f0e3054ead0b1a1b upstream.

If I'm not mistaken (and I don't think I am), the way in which the dcbnl_ops work is that drivers call dcb_ieee_setapp() and this populates the application table with dynamically allocated struct dcb_app_type entries that are kept in the module-global dcb_app_list.

However, nobody keeps exact track of these entries, and although dcb_ieee_delapp() is supposed to remove them, nobody does so when the interface goes away (example: driver unbinds from device). So the dcb_app_list will contain lingering entries with an ifindex that no longer matches any device in dcb_app_lookup().

Reclaim the lost memory by listening for the NETDEV_UNREGISTER event and flushing the app table entries of interfaces that are now gone.

In fact something like this used to be done as part of the initial commit (blamed below), but it was done in dcbnl_exit() -> dcb_flushapp(), essentially at module_exit time. That became dead code after commit 7a6b6f515f77 ("DCB: fix kconfig option") which essentially merged "tristate config DCB" and "bool config DCBNL" into a single "bool config DCB", so net/dcb/dcbnl.c could not be built as a module anymore.

Commit 36b9ad8084bd ("net/dcb: make dcbnl.c explicitly non-modular") recognized this and deleted dcbnl_exit() and dcb_flushapp() altogether, leaving us with the version we have today.

Since flushing application table entries can and should be done as soon as the netdevice disappears, fundamentally the commit that is to blame is the one that introduced the design of this API.

---
 net/dcb/dcbnl.c |   44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

@@ -2063,10 +2063,54 @@ u8 dcb_ieee_getapp_default_prio_mask(con
 }
 EXPORT_SYMBOL(dcb_ieee_getapp_default_prio_mask);
 
+static void dcbnl_flush_dev(struct net_device *dev)
+{
+	struct dcb_app_type *itr, *tmp;
+
+	spin_lock(&dcb_lock);
+
+	list_for_each_entry_safe(itr, tmp, &dcb_app_list, list) {
+		if (itr->ifindex == dev->ifindex) {
+			list_del(&itr->list);
+			kfree(itr);
+		}
+	}
+
+	spin_unlock(&dcb_lock);
+}
+
+static int dcbnl_netdevice_event(struct notifier_block *nb,
+				 unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+	switch (event) {
+	case NETDEV_UNREGISTER:
+		if (!dev->dcbnl_ops)
+			return NOTIFY_DONE;
+
+		dcbnl_flush_dev(dev);
+
+		return NOTIFY_OK;
+	default:
+		return NOTIFY_DONE;
+	}
+}
+
+static struct notifier_block dcbnl_nb __read_mostly = {
+	.notifier_call  = dcbnl_netdevice_event,
+};
+
 static int __init dcbnl_init(void)
 {
+	int err;
+
 	INIT_LIST_HEAD(&dcb_app_list);
 
+	err = register_netdevice_notifier(&dcbnl_nb);
+	if (err)
+		return err;
+
 	rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, 0);
 	rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, 0);
 

From: D. Wythe <[email protected]>

commit 0537f0a2151375dcf90c1bbfda6a0aaf57164e89 upstream.

The main reason for this unexpected SMC_CLC_DECL_ERR_REGRMB in client dues to following execution sequence:

Server Conn A: Server Conn B: Client Conn B:

smc_lgr_unregister_conn

                        smc_lgr_register_conn
                        smc_clc_send_accept     ->
                                                        smc_rtoken_add
smcr_buf_unuse
		->		Client Conn A:
				smc_rtoken_delete

smc_lgr_unregister_conn() makes current link available to assigned to new incoming connection, while smcr_buf_unuse() has not executed yet, which means that smc_rtoken_add may fail because of insufficient rtoken_entry, reversing their execution order will avoid this problem.

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

@@ -342,8 +342,8 @@ void smc_conn_free(struct smc_connection
 	} else {
 		smc_cdc_tx_dismiss_slots(conn);
 	}
-	smc_lgr_unregister_conn(conn);
 	smc_buf_unuse(conn, lgr);		/* allow buffer reuse */
+	smc_lgr_unregister_conn(conn);
 	conn->lgr = NULL;
 
 	if (!lgr->conns_num)

From: D. Wythe <[email protected]>

commit 4940a1fdf31c39f0806ac831cde333134862030b upstream.

The problem of SMC_CLC_DECL_ERR_REGRMB on the server is very clear. Based on the fact that whether a new SMC connection can be accepted or not depends on not only the limit of conn nums, but also the available entries of rtoken. Since the rtoken release is trigger by peer, while the conn nums is decrease by local, tons of thing can happen in this time difference.

This only thing that needs to be mentioned is that now all connection creations are completely protected by smc_server_lgr_pending lock, it's enough to check only the available entries in rtokens_used_mask.

---
 net/smc/smc_core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -632,7 +632,8 @@ int smc_conn_create(struct smc_sock *smc
 		    !lgr->sync_err &&
 		    lgr->vlan_id == ini->vlan_id &&
 		    (role == SMC_CLNT ||
-		     lgr->conns_num < SMC_RMBS_PER_LGR_MAX)) {
+		    (lgr->conns_num < SMC_RMBS_PER_LGR_MAX &&
+		      !bitmap_full(lgr->rtokens_used_mask, SMC_RMBS_PER_LGR_MAX)))) {
 			/* link group found */
 			ini->cln_first_contact = SMC_REUSE_CONTACT;
 			conn->lgr = lgr;

From: Ye Bin <[email protected]>

commit 8a7518931baa8ea023700987f3db31cb0a80610b upstream.

We do test with inject error fault base on v4.19, after test some time we found sync /dev/sda always failed.
[root@localhost] sync /dev/sda
sync: error syncing '/dev/sda': Input/output error

scsi log as follows:

[19069.812296] sd 0:0:0:0: [sda] tag#64 Send: scmd 0x00000000d03a0b6b
[19069.812302] sd 0:0:0:0: [sda] tag#64 CDB: Synchronize Cache(10) 35 00 00 00 00 00 00 00 00 00
[19069.812533] sd 0:0:0:0: [sda] tag#64 Done: SUCCESS Result: hostbyte=DID_OK driverbyte=DRIVER_OK
[19069.812536] sd 0:0:0:0: [sda] tag#64 CDB: Synchronize Cache(10) 35 00 00 00 00 00 00 00 00 00
[19069.812539] sd 0:0:0:0: [sda] tag#64 scsi host busy 1 failed 0
[19069.812542] sd 0:0:0:0: Notifying upper driver of completion (result 0)
[19069.812546] sd 0:0:0:0: [sda] tag#64 sd_done: completed 0 of 0 bytes
[19069.812549] sd 0:0:0:0: [sda] tag#64 0 sectors total, 0 bytes done.
[19069.812564] print_req_error: I/O error, dev sda, sector 0

ftrace log as follows:
rep-306069 [007] .... 19654.923315: block_bio_queue: 8,0 FWS 0 + 0 [rep] rep-306069 [007] .... 19654.923333: block_getrq: 8,0 FWS 0 + 0 [rep]
kworker/7:1H-250 [007] .... 19654.923352: block_rq_issue: 8,0 FF 0 () 0 + 0 [kworker/7:1H]
<idle>-0 [007] ..s. 19654.923562: block_rq_complete: 8,0 FF () 18446744073709551615 + 0 [0]
<idle>-0 [007] d.s. 19654.923576: block_rq_complete: 8,0 WS () 0 + 0 [-5]

As 8d6996630c03 introduce 'fq->rq_status', this data only update when 'flush_rq' reference count isn't zero. If flush request once failed and record error code in 'fq->rq_status'. If there is no chance to update 'fq->rq_status',then do fsync will always failed.
To address this issue reset 'fq->rq_status' after return error code to upper layer.

---
 block/blk-flush.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -222,8 +222,10 @@ static void flush_end_io(struct request
 		return;
 	}
 
-	if (fq->rq_status != BLK_STS_OK)
+	if (fq->rq_status != BLK_STS_OK) {
 		error = fq->rq_status;
+		fq->rq_status = BLK_STS_OK;
+	}
 
 	hctx = flush_rq->mq_hctx;
 	if (!q->elevator) {

From: Marek Marczykowski-Górecki <[email protected]>

commit dcf4ff7a48e7598e6b10126cc02177abb8ae4f3f upstream.

xennet_destroy_queues() relies on info->netdev->real_num_tx_queues to delete queues. Since d7dac083414eb5bb99a6d2ed53dc2c1b405224e5 ("net-sysfs: update the queue counts in the unregistration path"), unregister_netdev() indirectly sets real_num_tx_queues to 0. Those two facts together means, that xennet_destroy_queues() called from xennet_remove() cannot do its job, because it's called after unregister_netdev(). This results in kfree-ing queues that are still linked in napi, which ultimately crashes:

    BUG: kernel NULL pointer dereference, address: 0000000000000000
    #PF: supervisor read access in kernel mode
    #PF: error_code(0x0000) - not-present page
    PGD 0 P4D 0
    Oops: 0000 [#1] PREEMPT SMP PTI
    CPU: 1 PID: 52 Comm: xenwatch Tainted: G        W         5.16.10-1.32.fc32.qubes.x86_64+ #226
    RIP: 0010:free_netdev+0xa3/0x1a0
    Code: ff 48 89 df e8 2e e9 00 00 48 8b 43 50 48 8b 08 48 8d b8 a0 fe ff ff 48 8d a9 a0 fe ff ff 49 39 c4 75 26 eb 47 e8 ed c1 66 ff <48> 8b 85 60 01 00 00 48 8d 95 60 01 00 00 48 89 ef 48 2d 60 01 00
    RSP: 0000:ffffc90000bcfd00 EFLAGS: 00010286
    RAX: 0000000000000000 RBX: ffff88800edad000 RCX: 0000000000000000
    RDX: 0000000000000001 RSI: ffffc90000bcfc30 RDI: 00000000ffffffff
    RBP: fffffffffffffea0 R08: 0000000000000000 R09: 0000000000000000
    R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800edad050
    R13: ffff8880065f8f88 R14: 0000000000000000 R15: ffff8880066c6680
    FS:  0000000000000000(0000) GS:ffff8880f3300000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 0000000000000000 CR3: 00000000e998c006 CR4: 00000000003706e0
    Call Trace:
     <TASK>
     xennet_remove+0x13d/0x300 [xen_netfront]
     xenbus_dev_remove+0x6d/0xf0
     __device_release_driver+0x17a/0x240
     device_release_driver+0x24/0x30
     bus_remove_device+0xd8/0x140
     device_del+0x18b/0x410
     ? _raw_spin_unlock+0x16/0x30
     ? klist_iter_exit+0x14/0x20
     ? xenbus_dev_request_and_reply+0x80/0x80
     device_unregister+0x13/0x60
     xenbus_dev_changed+0x18e/0x1f0
     xenwatch_thread+0xc0/0x1a0
     ? do_wait_intr_irq+0xa0/0xa0
     kthread+0x16b/0x190
     ? set_kthread_struct+0x40/0x40
     ret_from_fork+0x22/0x30
     </TASK>

Fix this by calling xennet_destroy_queues() from xennet_uninit(), when real_num_tx_queues is still available. This ensures that queues are destroyed when real_num_tx_queues is set to 0, regardless of how unregister_netdev() was called.

Originally reported at
https://github.com/QubesOS/qubes-issues/issues/7257

---
 drivers/net/xen-netfront.c |   39 +++++++++++++++++++++++----------------
 1 file changed, 23 insertions(+), 16 deletions(-)

@@ -761,6 +761,28 @@ static int xennet_close(struct net_devic
 	return 0;
 }
 
+static void xennet_destroy_queues(struct netfront_info *info)
+{
+	unsigned int i;
+
+	for (i = 0; i < info->netdev->real_num_tx_queues; i++) {
+		struct netfront_queue *queue = &info->queues[i];
+
+		if (netif_running(info->netdev))
+			napi_disable(&queue->napi);
+		netif_napi_del(&queue->napi);
+	}
+
+	kfree(info->queues);
+	info->queues = NULL;
+}
+
+static void xennet_uninit(struct net_device *dev)
+{
+	struct netfront_info *np = netdev_priv(dev);
+	xennet_destroy_queues(np);
+}
+
 static void xennet_set_rx_rsp_cons(struct netfront_queue *queue, RING_IDX val)
 {
 	unsigned long flags;

@@ -1373,6 +1395,7 @@ static void xennet_poll_controller(struc
 #endif
 
 static const struct net_device_ops xennet_netdev_ops = {
+	.ndo_uninit          = xennet_uninit,
 	.ndo_open            = xennet_open,
 	.ndo_stop            = xennet_close,
 	.ndo_start_xmit      = xennet_start_xmit,

@@ -1860,22 +1883,6 @@ error:
 	return err;
 }
 
-static void xennet_destroy_queues(struct netfront_info *info)
-{
-	unsigned int i;
-
-	for (i = 0; i < info->netdev->real_num_tx_queues; i++) {
-		struct netfront_queue *queue = &info->queues[i];
-
-		if (netif_running(info->netdev))
-			napi_disable(&queue->napi);
-		netif_napi_del(&queue->napi);
-	}
-
-	kfree(info->queues);
-	info->queues = NULL;
-}
-
 static int xennet_create_queues(struct netfront_info *info,
 				unsigned int *num_queues)
 {

From: Valentin Schneider <[email protected]>

commit 620a6dc40754dc218f5b6389b5d335e9a107fd29 upstream.

The deduplicating sort in sched_init_numa() assumes that the first line in the distance table contains all unique values in the entire table. I've been trying to pen what this exactly means for the topology, but it's not straightforward. For instance, topology.c uses this example:

node 0 1 2 3

    0:  10  20  20  30
    1:  20  10  20  20
    2:  20  20  10  20
    3:  30  20  20  10

0 ----- 1

  |     / |
  |   /   |
  | /     |

2 ----- 3

Which works out just fine. However, if we swap nodes 0 and 1:

1 ----- 0

  |     / |
  |   /   |
  | /     |

2 ----- 3

we get this distance table:

node 0 1 2 3

    0:  10 20 20 20
    1:  20 10 20 30
    2:  20 20 10 20
    3:  20 30 20 10

Which breaks the deduplicating sort (non-representative first line). In this case this would just be a renumbering exercise, but it so happens that we can have a deduplicating sort that goes through the whole table in O(n²) at the extra cost of a temporary memory allocation (i.e. any form of set).

The ACPI spec (SLIT) mentions distances are encoded on 8 bits. Following this, implement the set as a 256-bits bitmap. Should this not be satisfactory (i.e. we want to support 32-bit values), then we'll have to go for some other sparse set implementation.

This has the added benefit of letting us allocate just the right amount of memory for sched_domains_numa_distance[], rather than an arbitrary (nr_node_ids + 1).

Note: DT binding equivalent (distance-map) decodes distances as 32-bit values.

---
 include/linux/topology.h |    1 
 kernel/sched/topology.c  |   99 ++++++++++++++++++++++-------------------------
 2 files changed, 49 insertions(+), 51 deletions(-)

@@ -48,6 +48,7 @@ int arch_update_cpu_topology(void);
 /* Conform to ACPI 2.0 SLIT distance definitions */
 #define LOCAL_DISTANCE		10
 #define REMOTE_DISTANCE		20
+#define DISTANCE_BITS           8
 #ifndef node_distance
 #define node_distance(from,to)	((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE)
 #endif

From: Dietmar Eggemann <[email protected]>

commit 71e5f6644fb2f3304fcb310145ded234a37e7cc1 upstream.

Commit "sched/topology: Make sched_init_numa() use a set for the deduplicating sort" allocates 'i + nr_levels (level)' instead of 'i + nr_levels + 1' sched_domain_topology_level.

This led to an Oops (on Arm64 juno with CONFIG_SCHED_DEBUG):

sched_init_domains
build_sched_domains()

    __free_domain_allocs()
      __sdt_free() {
	...
        for_each_sd_topology(tl)
	  ...
          sd = *per_cpu_ptr(sdd->sd, j); <--
	  ...
      }

---
 kernel/sched/topology.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -1658,7 +1658,7 @@ void sched_init_numa(void)
 	/* Compute default topology size */
 	for (i = 0; sched_domain_topology[i].mask; i++);
 
-	tl = kzalloc((i + nr_levels) *
+	tl = kzalloc((i + nr_levels + 1) *
 			sizeof(struct sched_domain_topology_level), GFP_KERNEL);
 	if (!tl)
 		return;

From: Valentin Schneider <[email protected]>

commit b22a8f7b4bde4e4ab73b64908ffd5d90ecdcdbfd upstream.

John Paul reported a warning about bogus NUMA distance values spurred by commit:

620a6dc40754 ("sched/topology: Make sched_init_numa() use a set for the deduplicating sort")

In this case, the afflicted machine comes up with a reported 256 possible nodes, all of which are 0 distance away from one another. This was previously silently ignored, but is now caught by the aforementioned commit.

The culprit is ia64's node_possible_map which remains unchanged from its initialization value of NODE_MASK_ALL. In John's case, the machine doesn't have any SRAT nor SLIT table, but AIUI the possible map remains untouched regardless of what ACPI tables end up being parsed. Thus, !online && possible nodes remain with a bogus distance of 0 (distances \in [0, 9] are "reserved and have no meaning" as per the ACPI spec).

Follow x86 / drivers/base/arch_numa's example and set the possible map to the parsed map, which in this case seems to be the online map.

---
 arch/ia64/kernel/acpi.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

@@ -448,7 +448,8 @@ void __init acpi_numa_fixup(void)
 	if (srat_num_cpus == 0) {
 		node_set_online(0);
 		node_cpuid[0].phys_id = hard_smp_processor_id();
-		return;
+		slit_distance(0, 0) = LOCAL_DISTANCE;
+		goto out;
 	}
 
 	/*

@@ -491,7 +492,7 @@ void __init acpi_numa_fixup(void)
 			for (j = 0; j < MAX_NUMNODES; j++)
 				slit_distance(i, j) = i == j ?
 					LOCAL_DISTANCE : REMOTE_DISTANCE;
-		return;
+		goto out;
 	}
 
 	memset(numa_slit, -1, sizeof(numa_slit));

@@ -516,6 +517,8 @@ void __init acpi_numa_fixup(void)
 		printk("\n");
 	}
 #endif
+out:
+	node_possible_map = node_online_map;
 }
 #endif				/* CONFIG_ACPI_NUMA */
 

From: Nicolas Escande <[email protected]>

commit 859ae7018316daa4adbc496012dcbbb458d7e510 upstream.

There are two problems with the current code that have been highlighted with the AQL feature that is now enbaled by default.

First problem is in ieee80211_rx_h_mesh_fwding(), ieee80211_select_queue_80211() is used on received packets to choose the sending AC queue of the forwarding packet although this function should only be called on TX packet (it uses ieee80211_tx_info). This ends with forwarded mesh packets been sent on unrelated random AC queue. To fix that, AC queue can directly be infered from skb->priority which has been extracted from QOS info (see ieee80211_parse_qos()).

Second problem is the value of queue_mapping set on forwarded mesh frames via skb_set_queue_mapping() is not the AC of the packet but a hardware queue index. This may or may not work depending on AC to HW queue mapping which is driver specific.

Both of these issues lead to improper AC selection while forwarding mesh packets but more importantly due to improper airtime accounting (which is done on a per STA, per AC basis) caused traffic stall with the introduction of AQL.

---
 net/mac80211/rx.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -2852,13 +2852,13 @@ ieee80211_rx_h_mesh_fwding(struct ieee80
 	    ether_addr_equal(sdata->vif.addr, hdr->addr3))
 		return RX_CONTINUE;
 
-	ac = ieee80211_select_queue_80211(sdata, skb, hdr);
+	ac = ieee802_1d_to_ac[skb->priority];
 	q = sdata->vif.hw_queue[ac];
 	if (ieee80211_queue_stopped(&local->hw, q)) {
 		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion);
 		return RX_DROP_MONITOR;
 	}
-	skb_set_queue_mapping(skb, q);
+	skb_set_queue_mapping(skb, ac);
 
 	if (!--mesh_hdr->ttl) {
 		if (!is_multicast_ether_addr(hdr->addr1))

From: Randy Dunlap <[email protected]>

commit e01b042e580f1fbf4fd8da467442451da00c7a90 upstream.

__setup() handlers should return 1 on success, i.e., the parameter has been handled. A return of 0 causes the "option=value" string to be added to init's environment strings, polluting it.

---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

@@ -4890,7 +4890,7 @@ static int __init stmmac_cmdline_opt(cha
 	char *opt;
 
 	if (!str || !*str)
-		return -EINVAL;
+		return 1;
 	while ((opt = strsep(&str, ",")) != NULL) {
 		if (!strncmp(opt, "debug:", 6)) {
 			if (kstrtoint(opt + 6, 0, &debug))

@@ -4921,11 +4921,11 @@ static int __init stmmac_cmdline_opt(cha
 				goto err;
 		}
 	}
-	return 0;
+	return 1;
 
 err:
 	pr_err("%s: ERROR broken module parameter conversion", __func__);
-	return -EINVAL;
+	return 1;
 }
 
 __setup("stmmaceth=", stmmac_cmdline_opt);

From: Slawomir Laba <[email protected]>

commit d2c0f45fcceb0995f208c441d9c9a453623f9ccf upstream.

The driver was queueing reset_task regardless of the netdev state.

Do not queue the reset task in iavf_change_mtu if netdev is not running.

---
 drivers/net/ethernet/intel/iavf/iavf_main.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

@@ -3323,8 +3323,11 @@ static int iavf_change_mtu(struct net_de
 		iavf_notify_client_l2_params(&adapter->vsi);
 		adapter->flags |= IAVF_FLAG_SERVICE_CLIENT_REQUESTED;
 	}
-	adapter->flags |= IAVF_FLAG_RESET_NEEDED;
-	queue_work(iavf_wq, &adapter->reset_task);
+
+	if (netif_running(netdev)) {
+		adapter->flags |= IAVF_FLAG_RESET_NEEDED;
+		queue_work(iavf_wq, &adapter->reset_task);
+	}
 
 	return 0;
 }

From: Randy Dunlap <[email protected]>

commit 50e06ddceeea263f57fe92baa677c638ecd65bb6 upstream.

__setup() handlers should return 1 on success, i.e., the parameter has been handled. A return of 0 causes the "option=value" string to be added to init's environment strings, polluting it.

---
 drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

@@ -2277,18 +2277,18 @@ static int __init sxgbe_cmdline_opt(char
 	char *opt;
 
 	if (!str || !*str)
-		return -EINVAL;
+		return 1;
 	while ((opt = strsep(&str, ",")) != NULL) {
 		if (!strncmp(opt, "eee_timer:", 10)) {
 			if (kstrtoint(opt + 10, 0, &eee_timer))
 				goto err;
 		}
 	}
-	return 0;
+	return 1;
 
 err:
 	pr_err("%s: ERROR broken module parameter conversion\n", __func__);
-	return -EINVAL;
+	return 1;
 }
 
 __setup("sxgbeeth=", sxgbe_cmdline_opt);

From: Zheyu Ma <[email protected]>

commit bd6f1fd5d33dfe5d1b4f2502d3694a7cc13f166d upstream.

During driver initialization, the pointer of card info, i.e. the variable 'ci' is required. However, the definition of 'com20020pci_id_table' reveals that this field is empty for some devices, which will cause null pointer dereference when initializing these devices.

The following log reveals it:

[    3.973806] KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
[    3.973819] RIP: 0010:com20020pci_probe+0x18d/0x13e0 [com20020_pci]
[    3.975181] Call Trace:
[    3.976208]  local_pci_probe+0x13f/0x210
[    3.977248]  pci_device_probe+0x34c/0x6d0
[    3.977255]  ? pci_uevent+0x470/0x470
[    3.978265]  really_probe+0x24c/0x8d0
[    3.978273]  __driver_probe_device+0x1b3/0x280
[    3.979288]  driver_probe_device+0x50/0x370

Fix this by checking whether the 'ci' is a null pointer first.

---
 drivers/net/arcnet/com20020-pci.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -136,6 +136,9 @@ static int com20020pci_probe(struct pci_
 		return -ENOMEM;
 
 	ci = (struct com20020_pci_card_info *)id->driver_data;
+	if (!ci)
+		return -EINVAL;
+
 	priv->ci = ci;
 	mm = &ci->misc_map;
 

From: Maciej Fijalkowski <[email protected]>

commit 6c7273a266759d9d36f7c862149f248bcdeddc0f upstream.

Commit c685c69fba71 ("ixgbe: don't do any AF_XDP zero-copy transmit if netif is not OK") addressed the ring transient state when MEM_TYPE_XSK_BUFF_POOL was being configured which in turn caused the interface to through down/up. Maurice reported that when carrier is not ok and xsk_pool is present on ring pair, ksoftirqd will consume 100% CPU cycles due to the constant NAPI rescheduling as ixgbe_poll() states that there is still some work to be done.

To fix this, do not set work_done to false for a !netif_carrier_ok().

---
 drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

@@ -583,12 +583,14 @@ static bool ixgbe_xmit_zc(struct ixgbe_r
 	u32 cmd_type;
 
 	while (budget-- > 0) {
-		if (unlikely(!ixgbe_desc_unused(xdp_ring)) ||
-		    !netif_carrier_ok(xdp_ring->netdev)) {
+		if (unlikely(!ixgbe_desc_unused(xdp_ring))) {
 			work_done = false;
 			break;
 		}
 
+		if (!netif_carrier_ok(xdp_ring->netdev))
+			break;
+
 		if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &desc))
 			break;
 

From: Jann Horn <[email protected]>

commit 258dd902022cb10c83671176688074879517fd21 upstream.

When the "block" flag is false, the old code would sometimes still call check_var_size(), which wrongly tells ->query_variable_store() that it can block.

As far as I can tell, this can't really materialize as a bug at the moment, because ->query_variable_store only does something on X86 with generic EFI, and in that configuration we always take the efivar_entry_set_nonblocking() path.

---
 drivers/firmware/efi/vars.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

@@ -750,6 +750,7 @@ int efivar_entry_set_safe(efi_char16_t *
 {
 	const struct efivar_operations *ops;
 	efi_status_t status;
+	unsigned long varsize;
 
 	if (!__efivars)
 		return -EINVAL;

@@ -772,15 +773,17 @@ int efivar_entry_set_safe(efi_char16_t *
 		return efivar_entry_set_nonblocking(name, vendor, attributes,
 						    size, data);
 
+	varsize = size + ucs2_strsize(name, 1024);
 	if (!block) {
 		if (down_trylock(&efivars_lock))
 			return -EBUSY;
+		status = check_var_size_nonblocking(attributes, varsize);
 	} else {
 		if (down_interruptible(&efivars_lock))
 			return -EINTR;
+		status = check_var_size(attributes, varsize);
 	}
 
-	status = check_var_size(attributes, size + ucs2_strsize(name, 1024));
 	if (status != EFI_SUCCESS) {
 		up(&efivars_lock);
 		return -ENOSPC;

From: Alyssa Ross <[email protected]>

commit 1ba603f56568c3b4c2542dfba07afa25f21dcff3 upstream.

modprobe can't handle spaces in aliases. Get rid of it to fix the issue.

---
 drivers/firmware/arm_scmi/driver.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -983,7 +983,7 @@ static struct platform_driver scmi_drive
 
 module_platform_driver(scmi_driver);
 
-MODULE_ALIAS("platform: arm-scmi");
+MODULE_ALIAS("platform:arm-scmi");
 MODULE_AUTHOR("Sudeep Holla <[email protected]>");
 MODULE_DESCRIPTION("ARM SCMI protocol driver");
 MODULE_LICENSE("GPL v2");

From: Fabio Estevam <[email protected]>

commit c5487b9cdea5c1ede38a7ec94db0fc59963c8e86 upstream.

Currently, the following error messages are seen during boot:

asoc-simple-card sound: control 2:0:0:SPDIF Switch:0 is already present cs4265 1-004f: ASoC: failed to add widget SPDIF dapm kcontrol SPDIF Switch: -16

Quoting Mark Brown:

"The driver is just plain buggy, it defines both a regular SPIDF Switch control and a SND_SOC_DAPM_SWITCH() called SPDIF both of which will create an identically named control, it can never have loaded without error. One or both of those has to be renamed or they need to be merged into one thing."

Fix the duplicated control name by combining the two SPDIF controls here and move the register bits onto the DAPM widget and have DAPM control them.

---
 sound/soc/codecs/cs4265.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

@@ -150,7 +150,6 @@ static const struct snd_kcontrol_new cs4
 	SOC_SINGLE("E to F Buffer Disable Switch", CS4265_SPDIF_CTL1,
 				6, 1, 0),
 	SOC_ENUM("C Data Access", cam_mode_enum),
-	SOC_SINGLE("SPDIF Switch", CS4265_SPDIF_CTL2, 5, 1, 1),
 	SOC_SINGLE("Validity Bit Control Switch", CS4265_SPDIF_CTL2,
 				3, 1, 0),
 	SOC_ENUM("SPDIF Mono/Stereo", spdif_mono_stereo_enum),

@@ -186,7 +185,7 @@ static const struct snd_soc_dapm_widget
 
 	SND_SOC_DAPM_SWITCH("Loopback", SND_SOC_NOPM, 0, 0,
 			&loopback_ctl),
-	SND_SOC_DAPM_SWITCH("SPDIF", SND_SOC_NOPM, 0, 0,
+	SND_SOC_DAPM_SWITCH("SPDIF", CS4265_SPDIF_CTL2, 5, 1,
 			&spdif_switch),
 	SND_SOC_DAPM_SWITCH("DAC", CS4265_PWRCTL, 1, 1,
 			&dac_switch),

From: Vincent Mailhol <[email protected]>

commit 035b0fcf02707d3c9c2890dc1484b11aa5335eb1 upstream.

The driver uses an atomic_t variable: gs_usb:active_channels to keep track of the number of opened channels in order to only allocate memory for the URBs when this count changes from zero to one.

However, the driver does not decrement the counter when an error occurs in gs_can_open(). This issue is fixed by changing the type from atomic_t to u8 and by simplifying the logic accordingly.

It is safe to use an u8 here because the network stack big kernel lock (a.k.a. rtnl_mutex) is being hold. For details, please refer to [1].

[1] https://lore.kernel.org/linux-can/CAMZ6Rq+sHpiw34ijPsmp7vbUpDtJwvVtdV7CvRZJsLixjAFfrg@mail.gmail.com/T/#t

---
 drivers/net/can/usb/gs_usb.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

@@ -190,8 +190,8 @@ struct gs_can {
 struct gs_usb {
 	struct gs_can *canch[GS_MAX_INTF];
 	struct usb_anchor rx_submitted;
-	atomic_t active_channels;
 	struct usb_device *udev;
+	u8 active_channels;
 };
 
 /* 'allocate' a tx context.

@@ -588,7 +588,7 @@ static int gs_can_open(struct net_device
 	if (rc)
 		return rc;
 
-	if (atomic_add_return(1, &parent->active_channels) == 1) {
+	if (!parent->active_channels) {
 		for (i = 0; i < GS_MAX_RX_URBS; i++) {
 			struct urb *urb;
 			u8 *buf;

@@ -689,6 +689,7 @@ static int gs_can_open(struct net_device
 
 	dev->can.state = CAN_STATE_ERROR_ACTIVE;
 
+	parent->active_channels++;
 	if (!(dev->can.ctrlmode & CAN_CTRLMODE_LISTENONLY))
 		netif_start_queue(netdev);
 

@@ -704,7 +705,8 @@ static int gs_can_close(struct net_devic
 	netif_stop_queue(netdev);
 
 	/* Stop polling */
-	if (atomic_dec_and_test(&parent->active_channels))
+	parent->active_channels--;
+	if (!parent->active_channels)
 		usb_kill_anchored_urbs(&parent->rx_submitted);
 
 	/* Stop sending URBs */

@@ -983,8 +985,6 @@ static int gs_usb_probe(struct usb_inter
 
 	init_usb_anchor(&dev->rx_submitted);
 
-	atomic_set(&dev->active_channels, 0);
-
 	usb_set_intfdata(intf, dev);
 	dev->udev = interface_to_usbdev(intf);
 

From: Brian Norris <[email protected]>

commit b5fbaf7d779f5f02b7f75b080e7707222573be2a upstream.

Commit b18c6c3c7768 ("ASoC: rockchip: cdn-dp sound output use spdif") switched the platform to SPDIF, but we didn't fix up the device tree.

Drop the pinctrl settings, because the 'spdif_bus' pins are either:
* unused (on kevin, bob), so the settings is ~harmless
* used by a different function (on scarlet), which causes probe failures (!!)

---
 arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi |   17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

@@ -281,7 +281,7 @@
 
 	sound: sound {
 		compatible = "rockchip,rk3399-gru-sound";
-		rockchip,cpu = <&i2s0 &i2s2>;
+		rockchip,cpu = <&i2s0 &spdif>;
 	};
 };
 

@@ -432,10 +432,6 @@ ap_i2c_audio: &i2c8 {
 	status = "okay";
 };
 
-&i2s2 {
-	status = "okay";
-};
-
 &io_domains {
 	status = "okay";
 

@@ -532,6 +528,17 @@ ap_i2c_audio: &i2c8 {
 	vqmmc-supply = <&ppvar_sd_card_io>;
 };
 
+&spdif {
+	status = "okay";
+
+	/*
+	 * SPDIF is routed internally to DP; we either don't use these pins, or
+	 * mux them to something else.
+	 */
+	/delete-property/ pinctrl-0;
+	/delete-property/ pinctrl-names;
+};
+
 &spi1 {
 	status = "okay";
 

From: Corinna Vinschen <[email protected]>

commit fda2635466cd26ad237e1bc5d3f6a60f97ad09b6 upstream.

igc_read_phy_reg_gpy checks the return value from igc_read_phy_reg_mdic and if it's not 0, returns immediately. By doing this, it leaves the HW semaphore in the acquired state.

Drop this premature return statement, the function returns after releasing the semaphore immediately anyway.

---
 drivers/net/ethernet/intel/igc/igc_phy.c |    2 --
 1 file changed, 2 deletions(-)

@@ -767,8 +767,6 @@ s32 igc_read_phy_reg_gpy(struct igc_hw *
 		if (ret_val)
 			return ret_val;
 		ret_val = igc_read_phy_reg_mdic(hw, offset, data);
-		if (ret_val)
-			return ret_val;
 		hw->phy.ops.release(hw);
 	} else {
 		ret_val = igc_read_xmdio_reg(hw, (u16)offset, dev_addr,

From: Russell King (Oracle) <[email protected]>

commit d920eaa4c4559f59be7b4c2d26fa0a2e1aaa3da9 upstream.

The kgdb code needs to register an undef hook for the Thumb UDF instruction that will fault in order to be functional on Thumb2 platforms.

---
 arch/arm/kernel/kgdb.c |   36 ++++++++++++++++++++++++++++--------
 1 file changed, 28 insertions(+), 8 deletions(-)

@@ -154,22 +154,38 @@ static int kgdb_compiled_brk_fn(struct p
 	return 0;
 }
 
-static struct undef_hook kgdb_brkpt_hook = {
+static struct undef_hook kgdb_brkpt_arm_hook = {
 	.instr_mask		= 0xffffffff,
 	.instr_val		= KGDB_BREAKINST,
-	.cpsr_mask		= MODE_MASK,
+	.cpsr_mask		= PSR_T_BIT | MODE_MASK,
 	.cpsr_val		= SVC_MODE,
 	.fn			= kgdb_brk_fn
 };
 
-static struct undef_hook kgdb_compiled_brkpt_hook = {
+static struct undef_hook kgdb_brkpt_thumb_hook = {
+	.instr_mask		= 0xffff,
+	.instr_val		= KGDB_BREAKINST & 0xffff,
+	.cpsr_mask		= PSR_T_BIT | MODE_MASK,
+	.cpsr_val		= PSR_T_BIT | SVC_MODE,
+	.fn			= kgdb_brk_fn
+};
+
+static struct undef_hook kgdb_compiled_brkpt_arm_hook = {
 	.instr_mask		= 0xffffffff,
 	.instr_val		= KGDB_COMPILED_BREAK,
-	.cpsr_mask		= MODE_MASK,
+	.cpsr_mask		= PSR_T_BIT | MODE_MASK,
 	.cpsr_val		= SVC_MODE,
 	.fn			= kgdb_compiled_brk_fn
 };
 
+static struct undef_hook kgdb_compiled_brkpt_thumb_hook = {
+	.instr_mask		= 0xffff,
+	.instr_val		= KGDB_COMPILED_BREAK & 0xffff,
+	.cpsr_mask		= PSR_T_BIT | MODE_MASK,
+	.cpsr_val		= PSR_T_BIT | SVC_MODE,
+	.fn			= kgdb_compiled_brk_fn
+};
+
 static int __kgdb_notify(struct die_args *args, unsigned long cmd)
 {
 	struct pt_regs *regs = args->regs;

@@ -210,8 +226,10 @@ int kgdb_arch_init(void)
 	if (ret != 0)
 		return ret;
 
-	register_undef_hook(&kgdb_brkpt_hook);
-	register_undef_hook(&kgdb_compiled_brkpt_hook);
+	register_undef_hook(&kgdb_brkpt_arm_hook);
+	register_undef_hook(&kgdb_brkpt_thumb_hook);
+	register_undef_hook(&kgdb_compiled_brkpt_arm_hook);
+	register_undef_hook(&kgdb_compiled_brkpt_thumb_hook);
 
 	return 0;
 }

@@ -224,8 +242,10 @@ int kgdb_arch_init(void)
  */
 void kgdb_arch_exit(void)
 {
-	unregister_undef_hook(&kgdb_brkpt_hook);
-	unregister_undef_hook(&kgdb_compiled_brkpt_hook);
+	unregister_undef_hook(&kgdb_brkpt_arm_hook);
+	unregister_undef_hook(&kgdb_brkpt_thumb_hook);
+	unregister_undef_hook(&kgdb_compiled_brkpt_arm_hook);
+	unregister_undef_hook(&kgdb_compiled_brkpt_thumb_hook);
 	unregister_die_notifier(&kgdb_notifier);
 }
 

From: Randy Dunlap <[email protected]>

commit 7b83299e5b9385943a857d59e15cba270df20d7e upstream.

early_param() handlers should return 0 on success. __setup() handlers should return 1 on success, i.e., the parameter has been handled. A return of 0 would cause the "option=value" string to be added to init's environment strings, polluting it.

../arch/arm/mm/mmu.c: In function 'test_early_cachepolicy':
../arch/arm/mm/mmu.c:215:1: error: no return statement in function returning non-void [-Werror=return-type] ../arch/arm/mm/mmu.c: In function 'test_noalign_setup':
../arch/arm/mm/mmu.c:221:1: error: no return statement in function returning non-void [-Werror=return-type]

---
 arch/arm/mm/mmu.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -229,12 +229,14 @@ early_param("ecc", early_ecc);
 static int __init early_cachepolicy(char *p)
 {
 	pr_warn("cachepolicy kernel parameter not supported without cp15\n");
+	return 0;
 }
 early_param("cachepolicy", early_cachepolicy);
 
 static int __init noalign_setup(char *__unused)
 {
 	pr_warn("noalign kernel parameter not supported without cp15\n");
+	return 1;
 }
 __setup("noalign", noalign_setup);
 

From: Sasha Neftin <[email protected]>

commit c4208653a327a09da1e9e7b10299709b6d9b17bf upstream.

Similar to "igc_read_phy_reg_gpy: drop premature return" patch. igc_write_phy_reg_gpy checks the return value from igc_write_phy_reg_mdic and if it's not 0, returns immediately. By doing this, it leaves the HW semaphore in the acquired state.

Drop this premature return statement, the function returns after releasing the semaphore immediately anyway.

---
 drivers/net/ethernet/intel/igc/igc_phy.c |    2 --
 1 file changed, 2 deletions(-)

@@ -734,8 +734,6 @@ s32 igc_write_phy_reg_gpy(struct igc_hw
 		if (ret_val)
 			return ret_val;
 		ret_val = igc_write_phy_reg_mdic(hw, offset, data);
-		if (ret_val)
-			return ret_val;
 		hw->phy.ops.release(hw);
 	} else {
 		ret_val = igc_write_xmdio_reg(hw, (u16)offset, dev_addr,

From: Sukadev Bhattiprolu <[email protected]>

commit 8d0657f39f487d904fca713e0bc39c2707382553 upstream.

Fix a tiny memory leak when flushing the reset work queue.

---
 drivers/net/ethernet/ibm/ibmvnic.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -2248,8 +2248,10 @@ static int ibmvnic_reset(struct ibmvnic_
 	 * flush reset queue and process this reset
 	 */
 	if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
-		list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
+		list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) {
 			list_del(entry);
+			kfree(list_entry(entry, struct ibmvnic_rwi, list));
+		}
 	}
 	rwi->reset_reason = reason;
 	list_add_tail(&rwi->list, &adapter->rwi_list);

From: Hugh Dickins <[email protected]>

commit f2b277c4d1c63a85127e8aa2588e9cc3bd21cb99 upstream.

Wangyong reports: after enabling tmpfs filesystem to support transparent hugepage with the following command:

echo always > /sys/kernel/mm/transparent_hugepage/shmem_enabled

the docker program tries to add F_SEAL_WRITE through the following command, but it fails unexpectedly with errno EBUSY:

fcntl(5, F_ADD_SEALS, F_SEAL_WRITE) = -1.

That is because memfd_tag_pins() and memfd_wait_for_pins() were never updated for shmem huge pages: checking page_mapcount() against page_count() is hopeless on THP subpages - they need to check total_mapcount() against page_count() on THP heads only.

Make memfd_tag_pins() (compared > 1) as strict as memfd_wait_for_pins() (compared != 1): either can be justified, but given the non-atomic total_mapcount() calculation, it is better now to be strict. Bear in mind that total_mapcount() itself scans all of the THP subpages, when choosing to take an XA_CHECK_SCHED latency break.

Also fix the unlikely xa_is_value() case in memfd_wait_for_pins(): if a page has been swapped out since memfd_tag_pins(), then its refcount must have fallen, and so it can safely be untagged.

---
 mm/memfd.c |   40 ++++++++++++++++++++++++++++------------
 1 file changed, 28 insertions(+), 12 deletions(-)

@@ -31,20 +31,28 @@
 static void memfd_tag_pins(struct xa_state *xas)
 {
 	struct page *page;
-	unsigned int tagged = 0;
+	int latency = 0;
+	int cache_count;
 
 	lru_add_drain();
 
 	xas_lock_irq(xas);
 	xas_for_each(xas, page, ULONG_MAX) {
-		if (xa_is_value(page))
-			continue;
-		page = find_subpage(page, xas->xa_index);
-		if (page_count(page) - page_mapcount(page) > 1)
+		cache_count = 1;
+		if (!xa_is_value(page) &&
+		    PageTransHuge(page) && !PageHuge(page))
+			cache_count = HPAGE_PMD_NR;
+
+		if (!xa_is_value(page) &&
+		    page_count(page) - total_mapcount(page) != cache_count)
 			xas_set_mark(xas, MEMFD_TAG_PINNED);
+		if (cache_count != 1)
+			xas_set(xas, page->index + cache_count);
 
-		if (++tagged % XA_CHECK_SCHED)
+		latency += cache_count;
+		if (latency < XA_CHECK_SCHED)
 			continue;
+		latency = 0;
 
 		xas_pause(xas);
 		xas_unlock_irq(xas);

@@ -73,7 +81,8 @@ static int memfd_wait_for_pins(struct ad
 
 	error = 0;
 	for (scan = 0; scan <= LAST_SCAN; scan++) {
-		unsigned int tagged = 0;
+		int latency = 0;
+		int cache_count;
 
 		if (!xas_marked(&xas, MEMFD_TAG_PINNED))
 			break;

@@ -87,10 +96,14 @@ static int memfd_wait_for_pins(struct ad
 		xas_lock_irq(&xas);
 		xas_for_each_marked(&xas, page, ULONG_MAX, MEMFD_TAG_PINNED) {
 			bool clear = true;
-			if (xa_is_value(page))
-				continue;
-			page = find_subpage(page, xas.xa_index);
-			if (page_count(page) - page_mapcount(page) != 1) {
+
+			cache_count = 1;
+			if (!xa_is_value(page) &&
+			    PageTransHuge(page) && !PageHuge(page))
+				cache_count = HPAGE_PMD_NR;
+
+			if (!xa_is_value(page) && cache_count !=
+			    page_count(page) - total_mapcount(page)) {
 				/*
 				 * On the last scan, we clean up all those tags
 				 * we inserted; but make a note that we still

@@ -103,8 +116,11 @@ static int memfd_wait_for_pins(struct ad
 			}
 			if (clear)
 				xas_clear_mark(&xas, MEMFD_TAG_PINNED);
-			if (++tagged % XA_CHECK_SCHED)
+
+			latency += cache_count;
+			if (latency < XA_CHECK_SCHED)
 				continue;
+			latency = 0;
 
 			xas_pause(&xas);
 			xas_unlock_irq(&xas);

From: Jiasheng Jiang <[email protected]>

[ Upstream commit a222fd8541394b36b13c89d1698d9530afd59a9c ]

As the possible failure of the ioremap(), the par_io could be NULL. Therefore it should be better to check it and return error in order to guarantee the success of the initiation.
But, I also notice that all the caller like mpc85xx_qe_par_io_init() in arch/powerpc/platforms/85xx/common.c don't check the return value of the par_io_init().
Actually, par_io_init() needs to check to handle the potential error. I will submit another patch to fix that.
Anyway, par_io_init() itsely should be fixed.

---
 drivers/soc/fsl/qe/qe_io.c | 2 ++
 1 file changed, 2 insertions(+)

index 3657e296a8a2..058c2fec9a4b 100644
@@ -37,6 +37,8 @@ int par_io_init(struct device_node *np)
 	if (ret)
 		return ret;
 	par_io = ioremap(res.start, resource_size(&res));
+	if (!par_io)
+		return -ENOMEM;
 
 	num_ports = of_get_property(np, "num-ports", NULL);
 	if (num_ports)

2.34.1

From: Jia-Ju Bai <[email protected]>

[ Upstream commit 767b9825ed1765894e569a3d698749d40d83762a ]

The function pci_find_capability() in t3_prep_adapter() can fail, so its return value should be checked.

---
 drivers/net/ethernet/chelsio/cxgb3/t3_hw.c | 2 ++
 1 file changed, 2 insertions(+)

index 0a9f2c596624..d3e11fe1eabc 100644
@@ -3677,6 +3677,8 @@ int t3_prep_adapter(struct adapter *adapter, const struct adapter_info *ai,
 	    MAC_STATS_ACCUM_SECS : (MAC_STATS_ACCUM_SECS * 10);
 	adapter->params.pci.vpd_cap_addr =
 	    pci_find_capability(adapter->pdev, PCI_CAP_ID_VPD);
+	if (!adapter->params.pci.vpd_cap_addr)
+		return -ENODEV;
 	ret = get_vpd_params(adapter, &adapter->params.vpd);
 	if (ret < 0)
 		return ret;

2.34.1

From: Jiasheng Jiang <[email protected]>

[ Upstream commit 6ad27f522cb3b210476daf63ce6ddb6568c0508b ]

As there's potential for failure of the nla_memdup(), check the return value.

---
 net/wireless/nl80211.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

index 7633d6a74bc2..f2bc465de284 100644
@@ -12320,6 +12320,9 @@ static int handle_nan_filter(struct nlattr *attr_filter,
 	i = 0;
 	nla_for_each_nested(attr, attr_filter, rem) {
 		filter[i].filter = nla_memdup(attr, GFP_KERNEL);
+		if (!filter[i].filter)
+			goto err;
+
 		filter[i].len = nla_len(attr);
 		i++;
 	}

@@ -12332,6 +12335,15 @@ static int handle_nan_filter(struct nlattr *attr_filter,
 	}
 
 	return 0;
+
+err:
+	i = 0;
+	nla_for_each_nested(attr, attr_filter, rem) {
+		kfree(filter[i].filter);
+		i++;
+	}
+	kfree(filter);
+	return -ENOMEM;
 }
 
 static int nl80211_nan_add_func(struct sk_buff *skb,

2.34.1

From: Hans de Goede <[email protected]>

commit 81a36d8ce554b82b0a08e2b95d0bd44fcbff339b upstream.

elan_disable_power() is called conditionally on suspend, where as elan_enable_power() is always called on resume. This leads to an imbalance in the regulator's enable count.

Move the regulator_[en|dis]able() calls out of elan_[en|dis]able_power() in preparation of fixing this.

No functional changes intended.

---
 drivers/input/mouse/elan_i2c_core.c |   62 ++++++++++++------------------------
 1 file changed, 22 insertions(+), 40 deletions(-)

@@ -139,55 +139,21 @@ static int elan_get_fwinfo(u16 ic_type,
 	return 0;
 }
 
-static int elan_enable_power(struct elan_tp_data *data)
+static int elan_set_power(struct elan_tp_data *data, bool on)
 {
 	int repeat = ETP_RETRY_COUNT;
 	int error;
 
-	error = regulator_enable(data->vcc);
-	if (error) {
-		dev_err(&data->client->dev,
-			"failed to enable regulator: %d\n", error);
-		return error;
-	}
-
 	do {
-		error = data->ops->power_control(data->client, true);
+		error = data->ops->power_control(data->client, on);
 		if (error >= 0)
 			return 0;
 
 		msleep(30);
 	} while (--repeat > 0);
 
-	dev_err(&data->client->dev, "failed to enable power: %d\n", error);
-	return error;
-}
-
-static int elan_disable_power(struct elan_tp_data *data)
-{
-	int repeat = ETP_RETRY_COUNT;
-	int error;
-
-	do {
-		error = data->ops->power_control(data->client, false);
-		if (!error) {
-			error = regulator_disable(data->vcc);
-			if (error) {
-				dev_err(&data->client->dev,
-					"failed to disable regulator: %d\n",
-					error);
-				/* Attempt to power the chip back up */
-				data->ops->power_control(data->client, true);
-				break;
-			}
-
-			return 0;
-		}
-
-		msleep(30);
-	} while (--repeat > 0);
-
-	dev_err(&data->client->dev, "failed to disable power: %d\n", error);
+	dev_err(&data->client->dev, "failed to set power %s: %d\n",
+		on ? "on" : "off", error);
 	return error;
 }
 

@@ -1316,9 +1282,19 @@ static int __maybe_unused elan_suspend(s
 		/* Enable wake from IRQ */
 		data->irq_wake = (enable_irq_wake(client->irq) == 0);
 	} else {
-		ret = elan_disable_power(data);
+		ret = elan_set_power(data, false);
+		if (ret)
+			goto err;
+
+		ret = regulator_disable(data->vcc);
+		if (ret) {
+			dev_err(dev, "error %d disabling regulator\n", ret);
+			/* Attempt to power the chip back up */
+			elan_set_power(data, true);
+		}
 	}
 
+err:
 	mutex_unlock(&data->sysfs_mutex);
 	return ret;
 }

@@ -1334,7 +1310,13 @@ static int __maybe_unused elan_resume(st
 		data->irq_wake = false;
 	}
 
-	error = elan_enable_power(data);
+	error = regulator_enable(data->vcc);
+	if (error) {
+		dev_err(dev, "error %d enabling regulator\n", error);
+		goto err;
+	}
+
+	error = elan_set_power(data, true);
 	if (error) {
 		dev_err(dev, "power up when resuming failed: %d\n", error);
 		goto err;

From: Hans de Goede <[email protected]>

commit 04b7762e37c95d9b965d16bb0e18dbd1fa2e2861 upstream.

Before these changes elan_suspend() would only disable the regulator when device_may_wakeup() returns false; whereas elan_resume() would unconditionally enable it, leading to an enable count imbalance when device_may_wakeup() returns true.

This triggers the "WARN_ON(regulator->enable_count)" in regulator_put() when the elan_i2c driver gets unbound, this happens e.g. with the hot-plugable dock with Elan I2C touchpad for the Asus TF103C 2-in-1.

Fix this by making the regulator_enable() call also be conditional on device_may_wakeup() returning false.

---
 drivers/input/mouse/elan_i2c_core.c |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

@@ -1305,17 +1305,17 @@ static int __maybe_unused elan_resume(st
 	struct elan_tp_data *data = i2c_get_clientdata(client);
 	int error;
 
-	if (device_may_wakeup(dev) && data->irq_wake) {
+	if (!device_may_wakeup(dev)) {
+		error = regulator_enable(data->vcc);
+		if (error) {
+			dev_err(dev, "error %d enabling regulator\n", error);
+			goto err;
+		}
+	} else if (data->irq_wake) {
 		disable_irq_wake(client->irq);
 		data->irq_wake = false;
 	}
 
-	error = regulator_enable(data->vcc);
-	if (error) {
-		dev_err(dev, "error %d enabling regulator\n", error);
-		goto err;
-	}
-
 	error = elan_set_power(data, true);
 	if (error) {
 		dev_err(dev, "power up when resuming failed: %d\n", error);

From: William Mahon <[email protected]>

commit bfa26ba343c727e055223be04e08f2ebdd43c293 upstream.

Numerous keyboards are adding dictate keys which allows for text messages to be dictated by a microphone.

This patch adds a new key definition KEY_DICTATE and maps 0x0c/0x0d8 usage code to this new keycode. Additionally hid-debug is adjusted to recognize this new usage code as well.

---
 drivers/hid/hid-debug.c                |    1 +
 drivers/hid/hid-input.c                |    1 +
 include/uapi/linux/input-event-codes.h |    1 +
 3 files changed, 3 insertions(+)

@@ -930,6 +930,7 @@ static const char *keys[KEY_MAX + 1] = {
 	[KEY_SCREENSAVER] = "ScreenSaver",
 	[KEY_VOICECOMMAND] = "VoiceCommand",
 	[KEY_EMOJI_PICKER] = "EmojiPicker",
+	[KEY_DICTATE] = "Dictate",
 	[KEY_BRIGHTNESS_MIN] = "BrightnessMin",
 	[KEY_BRIGHTNESS_MAX] = "BrightnessMax",
 	[KEY_BRIGHTNESS_AUTO] = "BrightnessAuto",

@@ -956,6 +956,7 @@ static void hidinput_configure_usage(str
 		case 0x0cd: map_key_clear(KEY_PLAYPAUSE);	break;
 		case 0x0cf: map_key_clear(KEY_VOICECOMMAND);	break;
 
+		case 0x0d8: map_key_clear(KEY_DICTATE);		break;
 		case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);	break;
 
 		case 0x0e0: map_abs_clear(ABS_VOLUME);		break;

@@ -608,6 +608,7 @@
 #define KEY_ASSISTANT		0x247	/* AL Context-aware desktop assistant */
 #define KEY_KBD_LAYOUT_NEXT	0x248	/* AC Next Keyboard Layout Select */
 #define KEY_EMOJI_PICKER	0x249	/* Show/hide emoji picker (HUTRR101) */
+#define KEY_DICTATE		0x24a	/* Start or Stop Voice Dictation Session (HUTRR99) */
 
 #define KEY_BRIGHTNESS_MIN		0x250	/* Set Brightness to Minimum */
 #define KEY_BRIGHTNESS_MAX		0x251	/* Set Brightness to Maximum */

From: William Mahon <[email protected]>

commit 327b89f0acc4c20a06ed59e4d9af7f6d804dc2e2 upstream.

This patch adds a new key definition for KEY_ALL_APPLICATIONS and aliases KEY_DASHBOARD to it.

It also maps the 0x0c/0x2a2 usage code to KEY_ALL_APPLICATIONS.

---
 drivers/hid/hid-debug.c                |    4 +++-
 drivers/hid/hid-input.c                |    2 ++
 include/uapi/linux/input-event-codes.h |    3 ++-
 3 files changed, 7 insertions(+), 2 deletions(-)

@@ -823,7 +823,9 @@ static const char *keys[KEY_MAX + 1] = {
 	[KEY_F22] = "F22",			[KEY_F23] = "F23",
 	[KEY_F24] = "F24",			[KEY_PLAYCD] = "PlayCD",
 	[KEY_PAUSECD] = "PauseCD",		[KEY_PROG3] = "Prog3",
-	[KEY_PROG4] = "Prog4",			[KEY_SUSPEND] = "Suspend",
+	[KEY_PROG4] = "Prog4",
+	[KEY_ALL_APPLICATIONS] = "AllApplications",
+	[KEY_SUSPEND] = "Suspend",
 	[KEY_CLOSE] = "Close",			[KEY_PLAY] = "Play",
 	[KEY_FASTFORWARD] = "FastForward",	[KEY_BASSBOOST] = "BassBoost",
 	[KEY_PRINT] = "Print",			[KEY_HP] = "HP",

@@ -1048,6 +1048,8 @@ static void hidinput_configure_usage(str
 
 		case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT);	break;
 
+		case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);	break;
+
 		case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);		break;
 		case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);		break;
 		case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);		break;

@@ -278,7 +278,8 @@
 #define KEY_PAUSECD		201
 #define KEY_PROG3		202
 #define KEY_PROG4		203
-#define KEY_DASHBOARD		204	/* AL Dashboard */
+#define KEY_ALL_APPLICATIONS	204	/* AC Desktop Show All Applications */
+#define KEY_DASHBOARD		KEY_ALL_APPLICATIONS
 #define KEY_SUSPEND		205
 #define KEY_CLOSE		206	/* AC Close */
 #define KEY_PLAY		207

From: Steven Rostedt (Google) <[email protected]>

commit 1d1898f65616c4601208963c3376c1d828cbf2c7 upstream.

When trying to add a histogram against an event with the "cpu" field, it was impossible due to "cpu" being a keyword to key off of the running CPU. So to fix this, it was changed to "common_cpu" to match the other generic fields (like "common_pid"). But since some scripts used "cpu" for keying off of the CPU (for events that did not have "cpu" as a field, which is most of them), a backward compatibility trick was added such that if "cpu" was used as a key, and the event did not have "cpu" as a field name, then it would fallback and switch over to "common_cpu".

This fix has a couple of subtle bugs. One was that when switching over to "common_cpu", it did not change the field name, it just set a flag. But the code still found a "cpu" field. The "cpu" field is used for filtering and is returned when the event does not have a "cpu" field.

This was found by:

  # cd /sys/kernel/tracing
  # echo hist:key=cpu,pid:sort=cpu > events/sched/sched_wakeup/trigger
  # cat events/sched/sched_wakeup/hist

Which showed the histogram unsorted:

{ cpu: 19, pid: 1175 } hitcount: 1
{ cpu: 6, pid: 239 } hitcount: 2
{ cpu: 23, pid: 1186 } hitcount: 14

{ cpu:         12, pid:        249 } hitcount:          2
{ cpu:          3, pid:        994 } hitcount:          5

Instead of hard coding the "cpu" checks, take advantage of the fact that trace_event_field_field() returns a special field for "cpu" and "CPU" if the event does not have "cpu" as a field. This special field has the "filter_type" of "FILTER_CPU". Check that to test if the returned field is of the CPU type instead of doing the string compare.

Also, fix the sorting bug by testing for the hist_field flag of HIST_FIELD_FL_CPU when setting up the sort routine. Otherwise it will use the special CPU field to know what compare routine to use, and since that special field does not have a size, it returns tracing_map_cmp_none.

---
 kernel/trace/trace_events_hist.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

@@ -2891,9 +2891,9 @@ parse_field(struct hist_trigger_data *hi
 			/*
 			 * For backward compatibility, if field_name
 			 * was "cpu", then we treat this the same as
-			 * common_cpu.
+			 * common_cpu. This also works for "CPU".
 			 */
-			if (strcmp(field_name, "cpu") == 0) {
+			if (field && field->filter_type == FILTER_CPU) {
 				*flags |= HIST_FIELD_FL_CPU;
 			} else {
 				hist_err(tr, HIST_ERR_FIELD_NOT_FOUND,

@@ -5247,7 +5247,7 @@ static int create_tracing_map_fields(str
 
 			if (hist_field->flags & HIST_FIELD_FL_STACKTRACE)
 				cmp_fn = tracing_map_cmp_none;
-			else if (!field)
+			else if (!field || hist_field->flags & HIST_FIELD_FL_CPU)
 				cmp_fn = tracing_map_cmp_num(hist_field->size,
 							     hist_field->is_signed);
 			else if (is_string_field(field))

From: Randy Dunlap <[email protected]>

commit 1d02b444b8d1345ea4708db3bab4db89a7784b55 upstream.

__setup() handlers should generally return 1 to indicate that the boot options have been handled.

Using invalid option values causes the entire kernel boot option string to be reported as Unknown and added to init's environment strings, polluting it.

Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc6
kprobe_event=p,syscall_any,$arg1 trace_options=quiet trace_clock=jiffies", will be passed to user space.

Run /sbin/init as init process
with arguments:
/sbin/init
with environment:

     HOME=/
     TERM=linux
     BOOT_IMAGE=/boot/bzImage-517rc6
     kprobe_event=p,syscall_any,$arg1
     trace_options=quiet
     trace_clock=jiffies

Return 1 from the __setup() handlers so that init's environment is not polluted with kernel boot options.

---
 kernel/trace/trace.c        |    4 ++--
 kernel/trace/trace_kprobe.c |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

@@ -219,7 +219,7 @@ static char trace_boot_options_buf[MAX_T
 static int __init set_trace_boot_options(char *str)
 {
 	strlcpy(trace_boot_options_buf, str, MAX_TRACER_SIZE);
-	return 0;
+	return 1;
 }
 __setup("trace_options=", set_trace_boot_options);
 

@@ -230,7 +230,7 @@ static int __init set_trace_boot_clock(c
 {
 	strlcpy(trace_boot_clock_buf, str, MAX_TRACER_SIZE);
 	trace_boot_clock = trace_boot_clock_buf;
-	return 0;
+	return 1;
 }
 __setup("trace_clock=", set_trace_boot_clock);
 

@@ -430,7 +430,7 @@ static int disable_trace_kprobe(struct t
 		 */
 		trace_probe_remove_file(tp, file);
 
-	return 0;
+	return 1;
 }
 
 #if defined(CONFIG_DYNAMIC_FTRACE) && \

From: Filipe Manana <[email protected]>

commit d99478874355d3a7b9d86dfb5d7590d5b1754b1f upstream.

When doing a full fsync, if we have prealloc extents beyond (or at) eof, and the leaves that contain them were not modified in the current transaction, we end up not logging them. This results in losing those extents when we replay the log after a power failure, since the inode is truncated to the current value of the logged i_size.

Just like for the fast fsync path, we need to always log all prealloc extents starting at or beyond i_size. The fast fsync case was fixed in commit 471d557afed155 ("Btrfs: fix loss of prealloc extents past i_size after fsync log replay") but it missed the full fsync path. The problem exists since the very early days, when the log tree was added by commit e02119d5a7b439 ("Btrfs: Add a write ahead tree log to optimize synchronous operations").

Example reproducer:

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

# Create our test file with many file extent items, so that they span

  # several leaves of metadata, even if the node/page size is 64K. Use
  # direct IO and not fsync/O_SYNC because it's both faster and it avoids
  # clearing the full sync flag from the inode - we want the fsync below
  # to trigger the slow full sync code path.
  $ xfs_io -f -d -c "pwrite -b 4K 0 16M" /mnt/foo

# Now add two preallocated extents to our file without extending the # file's size. One right at i_size, and another further beyond, leaving

  # a gap between the two prealloc extents.
  $ xfs_io -c "falloc -k 16M 1M" /mnt/foo
  $ xfs_io -c "falloc -k 20M 1M" /mnt/foo

# Make sure everything is durably persisted and the transaction is

  # committed. This makes all created extents to have a generation lower
  # than the generation of the transaction used by the next write and
  # fsync.
  sync

# Now overwrite only the first extent, which will result in modifying

  # only the first leaf of metadata for our inode. Then fsync it. This
  # fsync will use the slow code path (inode full sync bit is set) because
  # it's the first fsync since the inode was created/loaded.
  $ xfs_io -c "pwrite 0 4K" -c "fsync" /mnt/foo

# Extent list before power failure.

  $ xfs_io -c "fiemap -v" /mnt/foo
  /mnt/foo:
   EXT: FILE-OFFSET      BLOCK-RANGE      TOTAL FLAGS
     0: [0..7]:          2178048..2178055     8   0x0
     1: [8..16383]:      26632..43007     16376   0x0
     2: [16384..32767]:  2156544..2172927 16384   0x0
     3: [32768..34815]:  2172928..2174975  2048 0x800
     4: [34816..40959]:  hole              6144
     5: [40960..43007]:  2174976..2177023  2048 0x801

<power fail>

# Mount fs again, trigger log replay.

  $ mount /dev/sdc /mnt

# Extent list after power failure and log replay.

  $ xfs_io -c "fiemap -v" /mnt/foo
  /mnt/foo:
   EXT: FILE-OFFSET      BLOCK-RANGE      TOTAL FLAGS
     0: [0..7]:          2178048..2178055     8   0x0
     1: [8..16383]:      26632..43007     16376   0x0
     2: [16384..32767]:  2156544..2172927 16384   0x1

# The prealloc extents at file offsets 16M and 20M are missing.

So fix this by calling btrfs_log_prealloc_extents() when we are doing a full fsync, so that we always log all prealloc extents beyond eof.

A test case for fstests will follow soon.

---
 fs/btrfs/tree-log.c |   43 +++++++++++++++++++++++++++++++------------
 1 file changed, 31 insertions(+), 12 deletions(-)

@@ -4249,7 +4249,7 @@ static int log_one_extent(struct btrfs_t
 
 /*
  * Log all prealloc extents beyond the inode's i_size to make sure we do not
- * lose them after doing a fast fsync and replaying the log. We scan the
+ * lose them after doing a full/fast fsync and replaying the log. We scan the
  * subvolume's root instead of iterating the inode's extent map tree because
  * otherwise we can log incorrect extent items based on extent map conversion.
  * That can happen due to the fact that extent maps are merged when they

@@ -5042,6 +5042,7 @@ static int copy_inode_items_to_log(struc
 				   struct btrfs_log_ctx *ctx,
 				   bool *need_log_inode_item)
 {
+	const u64 i_size = i_size_read(&inode->vfs_inode);
 	struct btrfs_root *root = inode->root;
 	int ins_start_slot = 0;
 	int ins_nr = 0;

@@ -5062,13 +5063,21 @@ again:
 		if (min_key->type > max_key->type)
 			break;
 
-		if (min_key->type == BTRFS_INODE_ITEM_KEY)
+		if (min_key->type == BTRFS_INODE_ITEM_KEY) {
 			*need_log_inode_item = false;
-
-		if ((min_key->type == BTRFS_INODE_REF_KEY ||
-		     min_key->type == BTRFS_INODE_EXTREF_KEY) &&
-		    inode->generation == trans->transid &&
-		    !recursive_logging) {
+		} else if (min_key->type == BTRFS_EXTENT_DATA_KEY &&
+			   min_key->offset >= i_size) {
+			/*
+			 * Extents at and beyond eof are logged with
+			 * btrfs_log_prealloc_extents().
+			 * Only regular files have BTRFS_EXTENT_DATA_KEY keys,
+			 * and no keys greater than that, so bail out.
+			 */
+			break;
+		} else if ((min_key->type == BTRFS_INODE_REF_KEY ||
+			    min_key->type == BTRFS_INODE_EXTREF_KEY) &&
+			   inode->generation == trans->transid &&
+			   !recursive_logging) {
 			u64 other_ino = 0;
 			u64 other_parent = 0;
 

@@ -5099,10 +5108,8 @@ again:
 				btrfs_release_path(path);
 				goto next_key;
 			}
-		}
-
-		/* Skip xattrs, we log them later with btrfs_log_all_xattrs() */
-		if (min_key->type == BTRFS_XATTR_ITEM_KEY) {
+		} else if (min_key->type == BTRFS_XATTR_ITEM_KEY) {
+			/* Skip xattrs, logged later with btrfs_log_all_xattrs() */
 			if (ins_nr == 0)
 				goto next_slot;
 			ret = copy_items(trans, inode, dst_path, path,

@@ -5155,9 +5162,21 @@ next_key:
 			break;
 		}
 	}
-	if (ins_nr)
+	if (ins_nr) {
 		ret = copy_items(trans, inode, dst_path, path, ins_start_slot,
 				 ins_nr, inode_only, logged_isize);
+		if (ret)
+			return ret;
+	}
+
+	if (inode_only == LOG_INODE_ALL && S_ISREG(inode->vfs_inode.i_mode)) {
+		/*
+		 * Release the path because otherwise we might attempt to double
+		 * lock the same leaf with btrfs_log_prealloc_extents() below.
+		 */
+		btrfs_release_path(path);
+		ret = btrfs_log_prealloc_extents(trans, inode, dst_path);
+	}
 
 	return ret;
 }

From: Sidong Yang <[email protected]>

commit d4aef1e122d8bbdc15ce3bd0bc813d6b44a7d63a upstream.

The commit e804861bd4e6 ("btrfs: fix deadlock between quota disable and qgroup rescan worker") by Kawasaki resolves deadlock between quota disable and qgroup rescan worker. But also there is a deadlock case like it. It's about enabling or disabling quota and creating or removing qgroup. It can be reproduced in simple script below.

for i in {1..100}
do
btrfs quota enable /mnt &
btrfs qgroup create 1/0 /mnt &
btrfs qgroup destroy 1/0 /mnt &
btrfs quota disable /mnt &
done

Here's why the deadlock happens:

1) The quota rescan task is running.

2) Task A calls btrfs_quota_disable(), locks the qgroup_ioctl_lock mutex, and then calls btrfs_qgroup_wait_for_completion(), to wait for the quota rescan task to complete.

3) Task B calls btrfs_remove_qgroup() and it blocks when trying to lock the qgroup_ioctl_lock mutex, because it's being held by task A. At that point task B is holding a transaction handle for the current transaction.

4) The quota rescan task calls btrfs_commit_transaction(). This results in it waiting for all other tasks to release their handles on the transaction, but task B is blocked on the qgroup_ioctl_lock mutex while holding a handle on the transaction, and that mutex is being held by task A, which is waiting for the quota rescan task to complete, resulting in a deadlock between these 3 tasks.

To resolve this issue, the thread disabling quota should unlock qgroup_ioctl_lock before waiting rescan completion. Move btrfs_qgroup_wait_for_completion() after unlock of qgroup_ioctl_lock.

---
 fs/btrfs/qgroup.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

@@ -1117,13 +1117,20 @@ int btrfs_quota_disable(struct btrfs_fs_
 		goto out;
 
 	/*
+	 * Unlock the qgroup_ioctl_lock mutex before waiting for the rescan worker to
+	 * complete. Otherwise we can deadlock because btrfs_remove_qgroup() needs
+	 * to lock that mutex while holding a transaction handle and the rescan
+	 * worker needs to commit a transaction.
+	 */
+	mutex_unlock(&fs_info->qgroup_ioctl_lock);
+
+	/*
 	 * Request qgroup rescan worker to complete and wait for it. This wait
 	 * must be done before transaction start for quota disable since it may
 	 * deadlock with transaction by the qgroup rescan worker.
 	 */
 	clear_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
 	btrfs_qgroup_wait_for_completion(fs_info, false);
-	mutex_unlock(&fs_info->qgroup_ioctl_lock);
 
 	/*
 	 * 1 For the root item

From: Filipe Manana <[email protected]>

commit 4751dc99627e4d1465c5bfa8cb7ab31ed418eff5 upstream.

During log replay, whenever we need to check if a name (dentry) exists in a directory we do searches on the subvolume tree for inode references or or directory entries (BTRFS_DIR_INDEX_KEY keys, and BTRFS_DIR_ITEM_KEY keys as well, before kernel 5.17). However when during log replay we unlink a name, through btrfs_unlink_inode(), we may not delete inode references and dir index keys from a subvolume tree and instead just add the deletions to the delayed inode's delayed items, which will only be run when we commit the transaction used for log replay. This means that after an unlink operation during log replay, if we attempt to search for the same name during log replay, we will not see that the name was already deleted, since the deletion is recorded only on the delayed items.

We run delayed items after every unlink operation during log replay, except at unlink_old_inode_refs() and at add_inode_ref(). This was due to an overlook, as delayed items should be run after evert unlink, for the reasons stated above.

So fix those two cases.

---
 fs/btrfs/tree-log.c |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

@@ -1308,6 +1308,15 @@ again:
 						 inode, name, namelen);
 			kfree(name);
 			iput(dir);
+			/*
+			 * Whenever we need to check if a name exists or not, we
+			 * check the subvolume tree. So after an unlink we must
+			 * run delayed items, so that future checks for a name
+			 * during log replay see that the name does not exists
+			 * anymore.
+			 */
+			if (!ret)
+				ret = btrfs_run_delayed_items(trans);
 			if (ret)
 				goto out;
 			goto again;

@@ -1559,6 +1568,15 @@ static noinline int add_inode_ref(struct
 				 */
 				if (!ret && inode->i_nlink == 0)
 					inc_nlink(inode);
+				/*
+				 * Whenever we need to check if a name exists or
+				 * not, we check the subvolume tree. So after an
+				 * unlink we must run delayed items, so that future
+				 * checks for a name during log replay see that the
+				 * name does not exists anymore.
+				 */
+				if (!ret)
+					ret = btrfs_run_delayed_items(trans);
 			}
 			if (ret < 0)
 				goto out;

From: Jiri Bohac <[email protected]>

commit a6d95c5a628a09be129f25d5663a7e9db8261f51 upstream.

This reverts commit b515d2637276a3810d6595e10ab02c13bfd0b63a.

Commit b515d2637276a3810d6595e10ab02c13bfd0b63a ("xfrm: xfrm_state_mtu should return at least 1280 for ipv6") in v5.14 breaks the TCP MSS calculation in ipsec transport mode, resulting complete stalls of TCP connections. This happens when the (P)MTU is 1280 or slighly larger.

The desired formula for the MSS is:
MSS = (MTU - ESP_overhead) - IP header - TCP header

However, the above commit clamps the (MTU - ESP_overhead) to a minimum of 1280, turning the formula into
MSS = max(MTU - ESP overhead, 1280) - IP header - TCP header

With the (P)MTU near 1280, the calculated MSS is too large and the resulting TCP packets never make it to the destination because they are over the actual PMTU.

The above commit also causes suboptimal double fragmentation in xfrm tunnel mode, as described in
https://lore.kernel.org/netdev/[email protected]/

The original problem the above commit was trying to fix is now fixed by commit 6596a0229541270fb8d38d989f91b78838e5e9da ("xfrm: fix MTU regression").

---
 include/net/xfrm.h    |    1 -
 net/ipv4/esp4.c       |    2 +-
 net/ipv6/esp6.c       |    2 +-
 net/xfrm/xfrm_state.c |   14 ++------------
 4 files changed, 4 insertions(+), 15 deletions(-)

@@ -1543,7 +1543,6 @@ void xfrm_sad_getinfo(struct net *net, s
 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
 int xfrm_init_replay(struct xfrm_state *x);
-u32 __xfrm_state_mtu(struct xfrm_state *x, int mtu);
 u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
 int xfrm_init_state(struct xfrm_state *x);

@@ -499,7 +499,7 @@ static int esp_output(struct xfrm_state
 		struct xfrm_dst *dst = (struct xfrm_dst *)skb_dst(skb);
 		u32 padto;
 
-		padto = min(x->tfcpad, __xfrm_state_mtu(x, dst->child_mtu_cached));
+		padto = min(x->tfcpad, xfrm_state_mtu(x, dst->child_mtu_cached));
 		if (skb->len < padto)
 			esp.tfclen = padto - skb->len;
 	}

@@ -440,7 +440,7 @@ static int esp6_output(struct xfrm_state
 		struct xfrm_dst *dst = (struct xfrm_dst *)skb_dst(skb);
 		u32 padto;
 
-		padto = min(x->tfcpad, __xfrm_state_mtu(x, dst->child_mtu_cached));
+		padto = min(x->tfcpad, xfrm_state_mtu(x, dst->child_mtu_cached));
 		if (skb->len < padto)
 			esp.tfclen = padto - skb->len;
 	}