bfq: Update cgroup information before merging bio
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().
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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().
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/2a1077f17169a6059992a0bbdb330e0abad1e6d9
- https://git.kernel.org/stable/c/b06691af08b41dfd81052a3362514d9827b44bb1
- https://git.kernel.org/stable/c/d9165200c5627a2cf4408eefabdf0058bdf95e1a
- https://git.kernel.org/stable/c/da9f3025d595956410ceaab2bea01980d7775948
- https://git.kernel.org/stable/c/e8821f45612f2e6d9adb9c6ba0fb4184f57692aa
- https://git.kernel.org/stable/c/ea591cd4eb270393810e7be01feb8fde6a34fbbe
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49413.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49413