CVE-2024-41033 Information

Description

In the Linux kernel the following vulnerability has been resolved:

cachestat: do not flush stats in recency check

syzbot detects that cachestat() is flushing stats which can sleep in its RCU read section (see 1). This is done in the workingset_test_recent() step (which checks if the folio’s eviction is recent).

Move the stat flushing step to before the RCU read section of cachestat and skip stat flushing during the recency check.

Reference

https://git.kernel.org/stable/c/1d1ba14e00d290b1ed616ed78c8c49bf897ce390 https://git.kernel.org/stable/c/5a4d8944d6b1e1aaaa83ea42c116b520b4ed0394