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authorJan Kara <jack@suse.cz>2010-05-13 22:14:53 +0200
committerJan Kara <jack@suse.cz>2010-05-24 14:06:39 +0200
commiteea7feb072f5914ecafa95b3d83be0c229244d90 (patch)
treec9179933bd14f11f883448bd133876f907c3f50c /fs
parentf4b87dee923342505e1ddba8d34ce9de33e75050 (diff)
ocfs2: Fix use after free on remount read-only
We also have to cancel quota syncing thread on remount read only because at that moment quota is being turned off. Otherwise quota syncing thread will try to access already freed quota structures. Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs')
-rw-r--r--fs/ocfs2/super.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 2c26ce251cb..66f9984a983 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -883,9 +883,15 @@ static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
sb_dqopt(sb)->files[type],
type, QFMT_OCFS2,
DQUOT_SUSPENDED);
- else
+ else {
+ struct ocfs2_mem_dqinfo *oinfo;
+
+ /* Cancel periodic syncing before suspending */
+ oinfo = sb_dqinfo(sb, type)->dqi_priv;
+ cancel_delayed_work_sync(&oinfo->dqi_sync_work);
status = vfs_quota_disable(sb, type,
DQUOT_SUSPENDED);
+ }
if (status < 0)
break;
}