Description
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Stop the active perfmon before being destroyed Upon closing the file descriptor, the active performance monitor is not stopped. Although all perfmons are destroyed in `vc4_perfmon_close_file()`, the active performance monitor's pointer (`vc4->active_perfmon`) is still retained. If we open a new file descriptor and submit a few jobs with performance monitors, the driver will attempt to stop the active performance monitor using the stale pointer in `vc4->active_perfmon`. However, this pointer is no longer valid because the previous process has already terminated, and all performance monitors associated with it have been destroyed and freed. To fix this, when the active performance monitor belongs to a given process, explicitly stop it before destroying and freeing it.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
65101d8c9108201118efa7e08f4e2c57f438deb9 to < 75452da51e2403e14be007df80d133e1443fc967affected65101d8c9108201118efa7e08f4e2c57f438deb9 to < 937943c042503dc6087438bf3557f9057a588ba0affected65101d8c9108201118efa7e08f4e2c57f438deb9 to < c9adba739d5f7cdc47a7754df4a17b47b1ecf513affected65101d8c9108201118efa7e08f4e2c57f438deb9 to < 0b2ad4f6f2bec74a5287d96cb2325a5e11706f22affected
Linux Linux
Default version status: affected
4.17affected0 to < 4.17unaffected6.1.113 to ≤ 6.1.*unaffected6.6.57 to ≤ 6.6.*unaffected6.11.4 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/75452da51e2403e14be007df80d133e1443fc967 ↗
- https://git.kernel.org/stable/c/937943c042503dc6087438bf3557f9057a588ba0 ↗
- https://git.kernel.org/stable/c/c9adba739d5f7cdc47a7754df4a17b47b1ecf513 ↗
- https://git.kernel.org/stable/c/0b2ad4f6f2bec74a5287d96cb2325a5e11706f22 ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗