kernel: fscache: Fix oops due to race with cookie_lru and use_cookie

A flaw was found in the Linux kernel's fscache component. A race condition can occur when a cached object is being discarded while another process attempts to use it. This timing issue can lead to a null pointer dereference, causing the system to crash and resulting in a denial of service...

DEBIAN-CVE-2023-52982

In the Linux kernel, the following vulnerability has been resolved: fscache: Use waitonbit to wait for the freeing of relinquished volume The freeing of relinquished volume will wake up the pending volume acquisition by using wakeupbit, however it is mismatched with waitvarevent used in...

DEBIAN-CVE-2022-48989

In the Linux kernel, the following vulnerability has been resolved: fscache: Fix oops due to race with cookielru and usecookie If a cookie expires from the LRU and the LRUDISCARD flag is set, but the state machine has not run yet, it's possible another thread can call fscacheusecookie and begin t...