CVE-2024-36932

In the Linux kernel, the following vulnerability has been resolved:
thermal/debugfs: Prevent use-after-free from occurring after cdev removal
Since thermal_debug_cdev_remove() does not run under cdev->lock, it can run
in parallel with thermal_debug_cdev_state_update() and it may free the
struct thermal_debugfs object used by the latter after it has been checked
against NULL. If that happens, thermal_debug_cdev_state_update() will
access memory that has been freed already causing the kernel to crash.
Address this by using cdev->lock in thermal_debug_cdev_remove() around the
cdev->debugfs value check (in case the same cdev is removed at the same
time in two different threads) and its reset to NULL. Cc :6.8+
<[email protected]> # 6.8+