gpu: host1x: Fix race in syncpt alloc/free
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
gpu: host1x: Fix race in syncpt alloc/free
Fix race condition between host1x_syncpt_alloc()
and host1x_syncpt_put() by using kref_put_mutex()
instead of kref_put() + manual mutex locking.
This ensures no thread can acquire the
syncpt_mutex after the refcount drops to zero
but before syncpt_release acquires it.
This prevents races where syncpoints could
be allocated while still being cleaned up
from a previous release.
Remove explicit mutex locking in syncpt_release
as kref_put_mutex() handles this atomically.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/4aeaece518fa4436af93d1d8b786200d9656ff4bhttps://git.kernel.org/stable/c/4e6e07ce0197aecfb6c4a62862acc93b3efedeb7https://git.kernel.org/stable/c/6245cce711e2cdb2cc75c0bb8632952e36f8c972https://git.kernel.org/stable/c/79197c6007f2afbfd7bcf5b9b80ccabf8483d774https://git.kernel.org/stable/c/c7d393267c497502fa737607f435f05dfe6e3d9bhttps://git.kernel.org/stable/c/ca9388fba50dac2eb71c13702b7022a801bef90ehttps://git.kernel.org/stable/c/d138f73ffb0c57ded473c577719e6e551b7b1f27