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

hwmon: (corsair-psu) Stop device IO before calling hid_hw_stop

hid_hw_stop() does not stop the device IO.

This results in a race condition between hid_input_report() and the point
immediately following the execution of hid_device_io_start() within
corsairpsu_probe(). If the probe operation fails after "io start" has
been initiated, this race condition will result in a uaf vulnerability
[1].

CPU0				CPU1
====				====
corsairpsu_probe()
 hid_device_io_start()
  ... unlock driver_input_lock
 hid_hw_stop()
  kfree(hidraw)			__hid_input_report()
				 ... acquire driver_input_lock
				 hid_report_raw_event()
				  hidraw_report_event()
				   ... access hidraw's list_lock // trigger uaf

Consequently, when corsairpsu_probe() fails and hid_hw_stop() needs to
be executed, the io_started flag is first cleared while holding the
driver_input_lock to prevent potential race conditions involving input
reports.

[1]
BUG: KASAN: slab-use-after-free in rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56
Call Trace:
 hidraw_report_event+0x5d/0x3a0 drivers/hid/hidraw.c:577
 hid_report_raw_event+0x311/0x1730 drivers/hid/hid-core.c:2076
 __hid_input_report drivers/hid/hid-core.c:2152 [inline]
 hid_input_report+0x44e/0x580 drivers/hid/hid-core.c:2174
 hid_irq_in+0x47e/0x6d0 drivers/hid/usbhid/hid-core.c:286
 __usb_hcd_giveback_urb+0x3b3/0x5e0 drivers/usb/core/hcd.c:1657
 dummy_timer+0x8a9/0x47d0 drivers/usb/gadget/udc/dummy_hcd.c:2005

Allocated by task 10:
 hidraw_connect+0x57/0x430 drivers/hid/hidraw.c:606
 hid_connect+0x5bf/0x19d0 drivers/hid/hid-core.c:2277
 hid_hw_start+0xa8/0x120 drivers/hid/hid-core.c:2387
 corsairpsu_probe+0xd9/0x3c0 drivers/hwmon/corsair-psu.c:782

Freed by task 10:
 hidraw_disconnect+0x4f/0x60 drivers/hid/hidraw.c:662
 hid_disconnect drivers/hid/hid-core.c:2362 [inline]
 hid_hw_stop+0x101/0x1e0 drivers/hid/hid-core.c:2407
 corsairpsu_probe+0x327/0x3c0 drivers/hwmon/corsair-psu.c:826

Fix the problem by calling hid_device_io_stop() before calling
hid_hw_stop().

[groeck: Updated subject and description;
 call hid_device_io_stop() only if IO has been started]

https://git.kernel.org/stable/c/9ab8656548cd737b98d0b19c4253aff8d68e97f4

https://git.kernel.org/stable/c/bb25bd980f2d9bd34558e1b1d16636e4945baf14

https://git.kernel.org/stable/c/c0aae8d24f5e52d6910f97d59bc624e131f3ae1a

https://git.kernel.org/stable/c/e6e1e0f3050d1a1a3ea1c9d6253363e87fdad67a

https://git.kernel.org/stable/c/ec477af3a7e8d3964e62fd24ef01cdebb96b8e4e

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/hwmon/corsair-psu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"d115b51e0e567199c821fc39e13b6af7e78f247d","lessThan":"e6e1e0f3050d1a1a3ea1c9d6253363e87fdad67a","versionType":"git","status":"affected"},{"version":"d115b51e0e567199c821fc39e13b6af7e78f247d","lessThan":"c0aae8d24f5e52d6910f97d59bc624e131f3ae1a","versionType":"git","status":"affected"},{"version":"d115b51e0e567199c821fc39e13b6af7e78f247d","lessThan":"ec477af3a7e8d3964e62fd24ef01cdebb96b8e4e","versionType":"git","status":"affected"},{"version":"d115b51e0e567199c821fc39e13b6af7e78f247d","lessThan":"bb25bd980f2d9bd34558e1b1d16636e4945baf14","versionType":"git","status":"affected"},{"version":"d115b51e0e567199c821fc39e13b6af7e78f247d","lessThan":"9ab8656548cd737b98d0b19c4253aff8d68e97f4","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["drivers/hwmon/corsair-psu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.11","status":"affected"},{"version":"0","lessThan":"5.11","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc5","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]