Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sched: fix warning in sched_setaffinity Commit 8f9ea86fdf99b added some logic to sched_setaffinity that included a WARN when a per-task affinity assignment races with a cpuset update. Specifically, we can have a race where a cpuset update results in the task affinity no longer being a subset of the cpuset. That's fine; we have a fallback to instead use the cpuset mask. However, we have a WARN set up that will trigger if the cpuset mask has no overlap at all with the requested task affinity. This shouldn't be a warning condition; its trivial to create this condition. Reproduced the warning by the following setup: - $PID inside a cpuset cgroup - another thread repeatedly switching the cpuset cpus from 1-2 to just 1 - another thread repeatedly setting the $PID affinity (via taskset) to 2
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8f9ea86fdf99b81458cc21fc1c591fcd4a0fa1f4 before d35130036d327b6c175d95db9ea8d64e1abd4a1b; affected 8f9ea86fdf99b81458cc21fc1c591fcd4a0fa1f4 before 5c3fb75f538cfcb886f6dfeb497d99fc2f263ee6; affected 8f9ea86fdf99b81458cc21fc1c591fcd4a0fa1f4 before 70ee7947a29029736a1a06c73a48ff37674a851b |
| Linux / Linux | affected 6.2; unaffected 0 before 6.2; unaffected 6.6.160 through 6.6.*; unaffected 6.12.5 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.