Bug 1226938 (CVE-2024-38384) - VUL-0: CVE-2024-38384: kernel: blk-cgroup: fix list corruption from reorder of WRITE ->lqueued
Summary: VUL-0: CVE-2024-38384: kernel: blk-cgroup: fix list corruption from reorder o...
Status: NEW
Alias: CVE-2024-38384
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P3 - Medium : Normal
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/411979/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-38384:5.5:(AV:...
Keywords:
Depends on:
Blocks:
 
Reported: 2024-06-25 08:04 UTC by SMASH SMASH
Modified: 2024-07-08 15:16 UTC (History)
2 users (show)

See Also:
Found By: Security Response Team
Services Priority:
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Blocker: ---
Marketing QA Status: ---
IT Deployment: ---

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Description SMASH SMASH 2024-06-25 08:04:43 UTC 
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.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-38384
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-38384.mbox
https://git.kernel.org/stable/c/714e59b5456e4d6e4295a9968c564abe193f461c
https://git.kernel.org/stable/c/785298ab6b802afa75089239266b6bbea590809c
https://git.kernel.org/stable/c/d0aac2363549e12cc79b8e285f13d5a9f42fd08e
https://www.cve.org/CVERecord?id=CVE-2024-38384