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Change History

https://git.kernel.org/stable/c/714e59b5456e4d6e4295a9968c564abe193f461c

https://git.kernel.org/stable/c/785298ab6b802afa75089239266b6bbea590809c

https://git.kernel.org/stable/c/d0aac2363549e12cc79b8e285f13d5a9f42fd08e

CISA-ADP AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA-ADP CWE-400

In the Linux kernel, the following vulnerability has been resolved:

blk-cgroup: fix list corruption from reorder of WRITE ->lqueued

__blkcg_rstat_flush() can be run anytime, especially when blk_cgroup_bio_start
is being executed.

If WRITE of `->lqueued` is re-ordered with READ of 'bisc->lnode.next' in
the loop of __blkcg_rstat_flush(), `next_bisc` can be assigned with one
stat instance being added in blk_cgroup_bio_start(), then the local
list in __blkcg_rstat_flush() could be corrupted.

Fix

kernel.org https://git.kernel.org/stable/c/714e59b5456e4d6e4295a9968c564abe193f461c [No types assigned]

kernel.org https://git.kernel.org/stable/c/785298ab6b802afa75089239266b6bbea590809c [No types assigned]

kernel.org https://git.kernel.org/stable/c/d0aac2363549e12cc79b8e285f13d5a9f42fd08e [No types assigned]