Bug 1225562 (CVE-2023-52760) - VUL-0: CVE-2023-52760: kernel: gfs2: Fix slab-use-after-free in gfs2_qd_dealloc
Summary: VUL-0: CVE-2023-52760: kernel: gfs2: Fix slab-use-after-free in gfs2_qd_dealloc
Status: RESOLVED FIXED
Alias: CVE-2023-52760
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P3 - Medium : Major
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/407143/
Whiteboard: CVSSv3.1:SUSE:CVE-2023-52760:6.4:(AV:...
Keywords:
Depends on:
Blocks:
 
Reported: 2024-05-29 08:10 UTC by SMASH SMASH
Modified: 2024-06-24 13:49 UTC (History)
4 users (show)

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

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Description SMASH SMASH 2024-05-29 08:10:09 UTC 
In the Linux kernel, the following vulnerability has been resolved:

gfs2: Fix slab-use-after-free in gfs2_qd_dealloc

In gfs2_put_super(), whether withdrawn or not, the quota should
be cleaned up by gfs2_quota_cleanup().

Otherwise, struct gfs2_sbd will be freed before gfs2_qd_dealloc (rcu
callback) has run for all gfs2_quota_data objects, resulting in
use-after-free.

Also, gfs2_destroy_threads() and gfs2_quota_cleanup() is already called
by gfs2_make_fs_ro(), so in gfs2_put_super(), after calling
gfs2_make_fs_ro(), there is no need to call them again.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52760
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2023/CVE-2023-52760.mbox
https://git.kernel.org/stable/c/08a28272faa750d4357ea2cb48d2baefd778ea81
https://git.kernel.org/stable/c/bdcb8aa434c6d36b5c215d02a9ef07551be25a37
https://www.cve.org/CVERecord?id=CVE-2023-52760
Comment 6 Andrea Mattiazzo 2024-06-24 13:49:07 UTC 
All done, closing.