[PATCH] dquot_release oops fix

From: Jan Kara <jack@ucw.cz> Fix a null-pointer-deref oops in the quota code.

[PATCH] dquot_release oops fix
From: Jan Kara <jack@ucw.cz> Fix a null-pointer-deref oops in the quota code.
ee4c48c0 · Andrew Morton · Linus Torvalds · 252a94e9 · ee4c48c0
Commit ee4c48c0 authored May 14, 2004 by Andrew Morton Committed by Linus Torvalds May 14, 2004
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fs/dquot.c fs/dquot.c +2 -1

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--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -367,7 +367,8 @@ int dquot_release(struct dquot *dquot)
 	if (atomic_read(&dquot->dq_count) > 1)
 		goto out_dqlock;
 	down(&dqopt->dqio_sem);
-	ret = dqopt->ops[dquot->dq_type]->release_dqblk(dquot);
+	if (dqopt->ops[dquot->dq_type]->release_dqblk)
+		ret = dqopt->ops[dquot->dq_type]->release_dqblk(dquot);
 	clear_bit(DQ_ACTIVE_B, &dquot->dq_flags);
 	up(&dqopt->dqio_sem);
 out_dqlock: