gfs2: fix quota init duplicate scan
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.12.111, 6.18.53
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: gfs2: fix quota init duplicate scan gfs2_quota_init() checks for duplicate quota_change IDs while holding qd_lock and the quota hash bucket bitlock. That path used gfs2_qd_search_bucket(), which takes a lockref reference via lockref_get_not_dead(). On PREEMPT_RT this may sleep, which is not allowed under the bucket bitlock, triggering "sleeping function called from invalid context". Use a no-ref bucket lookup in this path, then continue duplicate handling without taking a lockref there. Refactor gfs2_qd_search_bucket() to build on top of the no-ref helper so lookup traversal stays in one place. This patch fixes a bug reported by syzbot.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From de0d95c26c41c1776e4d23b1a8b3f2bcfd1dae5f · fixed in 7fdcf16e5e14e11028f5bcaa6d25075eb5e876a0; From de0d95c26c41c1776e4d23b1a8b3f2bcfd1dae5f · fixed in 812a766e2b0a8f4d094393fad13475c57f5f86db; From de0d95c26c41c1776e4d23b1a8b3f2bcfd1dae5f · fixed in b99a1f0f18ee50445907f55069e88bcfd8947383
- Linux Linux
6.11
- KernelLinux
From 6.11.0 · fixed in 6.12.111; From 6.13.0 · fixed in 6.18.53