[PATCH] gfs2: replace BUG_ON with WARN_ON_ONCE in gfs2_quota_cleanup
Shaurya Rane <[email protected]>
| Newsgroups | dev.linux.lists.gfs2,dev.linux.lists.linux-kernel-mentees,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
gfs2_quota_cleanup() triggers a kernel BUG when called while the journal is still marked live and SDF_NORECOVERY is not set. This can occur during filesystem withdraw or error recovery paths, particularly via gfs2_make_fs_ro() during a reconfigure operation. The BUG_ON was intended to catch unexpected state where quota cleanup runs while the journal is active. However, the cleanup code is safe in this scenario because it skips quota entries with active references and waits for all references to drain via wait_event_timeout(). Crashing the kernel is unnecessarily harsh for what is a recoverable situation. Replace the BUG_ON with WARN_ON_ONCE to flag the unexpected state for debugging while allowing the cleanup to proceed safely. Reported-by: [email protected] Closes: https://syzkaller.appspot.com/bug?extid=af4d53576692f8956fd6 Fixes: 71733b492200 ("gfs2: fix kernel BUG in gfs2_quota_cleanup") Signed-off-by: Shaurya Rane <[email protected]> --- fs/gfs2/quota.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index 2298e06797ac..13f113d8aaef 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -1516,8 +1516,8 @@ void gfs2_quota_cleanup(struct gfs2_sbd *sdp) LIST_HEAD(dispose); int count; - BUG_ON(!test_bit(SDF_NORECOVERY, &sdp->sd_flags) && - test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); + WARN_ON_ONCE(!test_bit(SDF_NORECOVERY, &sdp->sd_flags) && + test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); spin_lock(&qd_lock); list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { -- 2.34.1