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CVE-2024-38384 In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix list corruption from reorder of…

Description

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 the issue by adding one barrier.

Affected products and versions

Product Affected versions Fixed in
Linux 6.10 earliest → < 6.10 6.10
Linux 6.9 earliest → < 6.9.4 6.9.4
Linux 6.6 earliest → < 6.6.33 6.6.33
Linux 6.2 No fix stated
linux_kernel 6.10 earliest → < 6.10-rc1 6.10-rc1

References

Timeline

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