Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: perf: Fix race between perf_event_exit_task() and perf_pending_task() A race condition exists between perf_event_exit_task() and perf_pending_task() during begin_new_exec(). During begin_new_exec(), perf_event_exit_task() may be called, and the PF_EXITING flag is not set on task. So perf_sigtrap() continues to execute and triggers WARN_ON_ONCE(event->ctx->task != current). Since both task exit and exec paths can call perf_event_exit_task() which sets ctx->task to TASK_TOMBSTONE, fix this by explicitly checking if event->ctx->task equals TASK_TOMBSTONE and dropping the redundant PF_EXITING check.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 97ba62b278674293762c3d91f724f1bb922f04e0 before 655acfa713bce9ae9c81a654459890c2f58cb4e8; affected 97ba62b278674293762c3d91f724f1bb922f04e0 before 672b8a9ce8f51b991481dfde26fba5cc4340a91a; affected 97ba62b278674293762c3d91f724f1bb922f04e0 before 524063fea29f8a841e49927ea7a8085194ad3ec2; affected 97ba62b278674293762c3d91f724f1bb922f04e0 before 81e61e3f8befa1bae3ec8e779d8ada5e5e362c21; affected 97ba62b278674293762c3d91f724f1bb922f04e0 before ffb684f2aa141eeb0caa6308422e7e05d1ded7c4 |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/655acfa713bce9ae9c81a654459890c2f58cb4e8
- https://git.kernel.org/stable/c/672b8a9ce8f51b991481dfde26fba5cc4340a91a
- https://git.kernel.org/stable/c/524063fea29f8a841e49927ea7a8085194ad3ec2
- https://git.kernel.org/stable/c/81e61e3f8befa1bae3ec8e779d8ada5e5e362c21
- https://git.kernel.org/stable/c/ffb684f2aa141eeb0caa6308422e7e05d1ded7c4