Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected de0d95c26c41c1776e4d23b1a8b3f2bcfd1dae5f before 7fdcf16e5e14e11028f5bcaa6d25075eb5e876a0; affected de0d95c26c41c1776e4d23b1a8b3f2bcfd1dae5f before 812a766e2b0a8f4d094393fad13475c57f5f86db; affected de0d95c26c41c1776e4d23b1a8b3f2bcfd1dae5f before b99a1f0f18ee50445907f55069e88bcfd8947383 |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.