Input: cyapa - add missing input core locking to suspend/resume functions
CVE: CVE-2023-52884
Component: kernel
CWE: CWE-667
Severity: Low
CVSS v3: 5.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Release date: 2023-01-01T00:00:00+00:00

In the Linux kernel, the following vulnerability has been resolved:

Input: cyapa - add missing input core locking to suspend/resume functions

Grab input->mutex during suspend/resume functions like it is done in
other input drivers. This fixes the following warning during system
suspend/resume cycle on Samsung Exynos5250-based Snow Chromebook:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 1680 at drivers/input/input.c:2291 input_device_enabled+0x68/0x6c
Modules linked in: ...
CPU: 1 PID: 1680 Comm: kworker/u4:12 Tainted: G        W          6.6.0-rc5-next-20231009 #14109
Hardware name: Samsung Exynos (Flattened Device Tree)
Workqueue: events_unbound async_run_entry_fn
 unwind_backtrace from show_stack+0x10/0x14
 show_stack from dump_stack_lvl+0x58/0x70
 dump_stack_lvl from __warn+0x1a8/0x1cc
 __warn from warn_slowpath_fmt+0x18c/0x1b4
 warn_slowpath_fmt from input_device_enabled+0x68/0x6c
 input_device_enabled from cyapa_gen3_set_power_mode+0x13c/0x1dc
 cyapa_gen3_set_power_mode from cyapa_reinitialize+0x10c/0x15c
 cyapa_reinitialize from cyapa_resume+0x48/0x98
 cyapa_resume from dpm_run_callback+0x90/0x298
 dpm_run_callback from device_resume+0xb4/0x258
 device_resume from async_resume+0x20/0x64
 async_resume from async_run_entry_fn+0x40/0x15c
 async_run_entry_fn from process_scheduled_works+0xbc/0x6a8
 process_scheduled_works from worker_thread+0x188/0x454
 worker_thread from kthread+0x108/0x140
 kthread from ret_from_fork+0x14/0x28
Exception stack(0xf1625fb0 to 0xf1625ff8)
...
---[ end trace 0000000000000000 ]---
...
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1680 at drivers/input/input.c:2291 input_device_enabled+0x68/0x6c
Modules linked in: ...
CPU: 1 PID: 1680 Comm: kworker/u4:12 Tainted: G        W          6.6.0-rc5-next-20231009 #14109
Hardware name: Samsung Exynos (Flattened Device Tree)
Workqueue: events_unbound async_run_entry_fn
 unwind_backtrace from show_stack+0x10/0x14
 show_stack from dump_stack_lvl+0x58/0x70
 dump_stack_lvl from __warn+0x1a8/0x1cc
 __warn from warn_slowpath_fmt+0x18c/0x1b4
 warn_slowpath_fmt from input_device_enabled+0x68/0x6c
 input_device_enabled from cyapa_gen3_set_power_mode+0x13c/0x1dc
 cyapa_gen3_set_power_mode from cyapa_reinitialize+0x10c/0x15c
 cyapa_reinitialize from cyapa_resume+0x48/0x98
 cyapa_resume from dpm_run_callback+0x90/0x298
 dpm_run_callback from device_resume+0xb4/0x258
 device_resume from async_resume+0x20/0x64
 async_resume from async_run_entry_fn+0x40/0x15c
 async_run_entry_fn from process_scheduled_works+0xbc/0x6a8
 process_scheduled_works from worker_thread+0x188/0x454
 worker_thread from kthread+0x108/0x140
 kthread from ret_from_fork+0x14/0x28
Exception stack(0xf1625fb0 to 0xf1625ff8)
...
---[ end trace 0000000000000000 ]---


Remediation:
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.