CVE-2024-41932

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> sched: fix warning in sched_setaffinity<br /> <br /> Commit 8f9ea86fdf99b added some logic to sched_setaffinity that included<br /> a WARN when a per-task affinity assignment races with a cpuset update.<br /> <br /> Specifically, we can have a race where a cpuset update results in the<br /> task affinity no longer being a subset of the cpuset. That&amp;#39;s fine; we<br /> have a fallback to instead use the cpuset mask. However, we have a WARN<br /> set up that will trigger if the cpuset mask has no overlap at all with<br /> the requested task affinity. This shouldn&amp;#39;t be a warning condition; its<br /> trivial to create this condition.<br /> <br /> Reproduced the warning by the following setup:<br /> <br /> - $PID inside a cpuset cgroup<br /> - another thread repeatedly switching the cpuset cpus from 1-2 to just 1<br /> - another thread repeatedly setting the $PID affinity (via taskset) to 2