Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: perf: Make sure to use pmu_ctx->pmu for groups Oliver reported that x86_pmu_del() ended up doing an out-of-bound memory access when group_sched_in() fails and needs to roll back. This *should* be handled by the transaction callbacks, but he found that when the group leader is a software event, the transaction handlers of the wrong PMU are used. Despite the move_group case in perf_event_open() and group_sched_in() using pmu_ctx->pmu. Turns out, inherit uses event->pmu to clone the events, effectively undoing the move_group case for all inherited contexts. Fix this by also making inherit use pmu_ctx->pmu, ensuring all inherited counters end up in the same pmu context. Similarly, __perf_event_read() should use equally use pmu_ctx->pmu for the group case.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected bd27568117664b8b3e259721393df420ed51f57b before 656f35b463995bee024d948440128230aacd81e1; affected bd27568117664b8b3e259721393df420ed51f57b before 3a696e84a8b1fafdd774bb30d62919faf844d9e4; affected bd27568117664b8b3e259721393df420ed51f57b before 35f7914e54fe7f13654c22ee045b05e4b6d8062b; affected bd27568117664b8b3e259721393df420ed51f57b before 4c759446046500a1a6785b25725725c3ff087ace; affected bd27568117664b8b3e259721393df420ed51f57b before 4b9ce671960627b2505b3f64742544ae9801df97 |
| Linux / Linux | affected 6.2; unaffected 0 before 6.2; unaffected 6.6.131 through 6.6.*; unaffected 6.12.80 through 6.12.*; unaffected 6.18.21 through 6.18.*; unaffected 6.19.11 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/656f35b463995bee024d948440128230aacd81e1
- https://git.kernel.org/stable/c/3a696e84a8b1fafdd774bb30d62919faf844d9e4
- https://git.kernel.org/stable/c/35f7914e54fe7f13654c22ee045b05e4b6d8062b
- https://git.kernel.org/stable/c/4c759446046500a1a6785b25725725c3ff087ace
- https://git.kernel.org/stable/c/4b9ce671960627b2505b3f64742544ae9801df97
ADP enrichment
No English description supplied.
No references supplied.