block: free q->flush_rq in blk_init_allocated_queue error paths
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@fedoraproject.org>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/block/blk-core.c b/block/blk-core.c
index 4cd5ffc..bfe16d5 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -713,7 +713,7 @@
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 @@
/* 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);