CVE-2022-49413
bfq: Update cgroup information before merging bio
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Description
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().
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- 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
References (6)
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