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Date: Fri, 10 Oct 2014 16:23:07 +0200
From: Jan Kara <jack@...e.cz>
To: linux-fsdevel@...r.kernel.org
Cc: linux-ext4@...r.kernel.org, Dave Chinner <david@...morbit.com>,
xfs@....sgi.com, cluster-devel@...hat.com,
Steven Whitehouse <swhiteho@...hat.com>,
Mark Fasheh <mfasheh@...e.com>,
Joel Becker <jlbec@...lplan.org>, ocfs2-devel@....oracle.com,
reiserfs-devel@...r.kernel.org, Jeff Mahoney <jeffm@...e.de>,
Dave Kleikamp <shaggy@...nel.org>,
jfs-discussion@...ts.sourceforge.net, tytso@....edu,
viro@...iv.linux.org.uk, Dave Jones <davej@...hat.com>,
Dave Jones <davej@...oraproject.org>,
Jens Axboe <axboe@...com>,
Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH] block: free q->flush_rq in blk_init_allocated_queue error paths
From: Dave Jones <davej@...hat.com>
Commit 7982e90c3a57 ("block: fix q->flush_rq NULL pointer crash on
dm-mpath flush") moved an allocation to blk_init_allocated_queue(), but
neglected to free that allocation on the error paths that follow.
Signed-off-by: Dave Jones <davej@...oraproject.org>
Acked-by: Mike Snitzer <snitzer@...hat.com>
Signed-off-by: Jens Axboe <axboe@...com>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
---
block/blk-core.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 4cd5ffc18442..bfe16d5af9f9 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -713,7 +713,7 @@ blk_init_allocated_queue(struct request_queue *q, request_fn_proc *rfn,
return NULL;
if (blk_init_rl(&q->root_rl, q, GFP_KERNEL))
- return NULL;
+ goto fail;
q->request_fn = rfn;
q->prep_rq_fn = NULL;
@@ -737,12 +737,16 @@ blk_init_allocated_queue(struct request_queue *q, request_fn_proc *rfn,
/* init elevator */
if (elevator_init(q, NULL)) {
mutex_unlock(&q->sysfs_lock);
- return NULL;
+ goto fail;
}
mutex_unlock(&q->sysfs_lock);
return q;
+
+fail:
+ kfree(q->flush_rq);
+ return NULL;
}
EXPORT_SYMBOL(blk_init_allocated_queue);
--
1.8.1.4
--
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