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ocfs2: Fix use after free on remount read-only

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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>
This commit is contained in:
Jan Kara 2010-05-13 22:14:53 +02:00
parent f4b87dee92
commit eea7feb072
1 changed files with 7 additions and 1 deletions
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8
fs/ocfs2/super.c
View file

@ -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;
}