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Change History

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

blk-cgroup: fix list corruption from resetting io stat

Since commit 3b8cc6298724 ("blk-cgroup: Optimize blkcg_rstat_flush()"),
each iostat instance is added to blkcg percpu list, so blkcg_reset_stats()
can't reset the stat instance by memset(), otherwise the llist may be
corrupted.

Fix the issue by only resetting the counter part.

kernel.org https://git.kernel.org/stable/c/6da6680632792709cecf2b006f2fe3ca7857e791 [No types assigned]

kernel.org https://git.kernel.org/stable/c/89bb36c72e1951843f9e04dc84412e31fcc849a9 [No types assigned]

kernel.org https://git.kernel.org/stable/c/d4a60298ac34f027a09f8f893fdbd9e06279bb24 [No types assigned]