In the Linux kernel, the following vulnerability has been resolved:
fs/resctrl: Fix double-add of pseudo-locked regions RMID to free list
A pseudo-locked groups RMID is freed when it is created. On unmount rmdir_all_sub() unconditionally frees all RMID of all groups, resulting in a double-free of the pseudo-locked groups RMID. The consequence of this is that the original free results in the pseudo-locked groups RMID being added to the rmid_free_lru linked list and the second free then attempts to add the same RMID entry to the rmid_free_lru again.
Do not double-free a pseudo-locked groups RMID.
References
- https://git.kernel.org/stable/c/52007bfdce5310e8c8a29849bfbfb188a1e50ca0
- https://git.kernel.org/stable/c/9168176894332312c12ef052e784735dbf4ffe3f
- https://git.kernel.org/stable/c/b2fe9e140aa94b2816aab7ebc692b543e418f5e3
- https://git.kernel.org/stable/c/b9f089723aee892efc77c349ae47a6b452b293c4
- https://git.kernel.org/stable/c/f7628eea9212e185a09df3aea603ca8580b8678d