CVE-2022-49413

In the Linux kernel, the following vulnerability has been resolved: bfq: Update cgroup information before merging bio When the process is migrated to a different cgroup (or in case of writeback just starts submitting bios associated with a different cgroup) bfq_merge_bio() can operate with stale cgroup information in bic. Thus the bio can be merged to a request from a different cgroup or it can result in merging of bfqqs for different cgroups or bfqqs of already dead cgroups and causing possible use-after-free issues. Fix the problem by updating cgroup information in bfq_merge_bio().

• linux linux kernel (>= 4.12 < 5.4.198) • linux linux kernel (>= 5.5 < 5.10.121) • linux linux kernel (>= 5.11 < 5.15.46) • linux linux kernel (>= 5.16 < 5.17.14) • linux linux kernel (>= 5.18 < 5.18.3)