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| author | Jie Wang <jie.wang@intel.com> | 2026-04-23 13:39:34 +0000 |
|---|---|---|
| committer | Andreas Gruenbacher <agruenba@redhat.com> | 2026-04-23 09:18:08 +0200 |
| commit | b99a1f0f18ee50445907f55069e88bcfd8947383 (patch) | |
| tree | d0289641f1d36b721c953d8d0d8390f4d3af189c /mm/tests/git@git.tavy.me:linux.git | |
| parent | 4da0dd95be3b0321bf9687fb1a3c2fed3319c032 (diff) | |
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.
Reported-by: syzbot+642d0561f78362d67d3f@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=642d0561f78362d67d3f
Tested-by: syzbot+642d0561f78362d67d3f@syzkaller.appspotmail.com
Signed-off-by: Jie Wang <jie.wang@intel.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'mm/tests/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions