* [PATCH] block: Check for valid bd_disk in bdev_get_queue()
@ 2013-01-30 9:35 Hannes Reinecke
0 siblings, 0 replies; only message in thread
From: Hannes Reinecke @ 2013-01-30 9:35 UTC (permalink / raw)
To: Jens Axboe; +Cc: Linux Kernel, Jeff Mahoney, Hannes Reinecke
bdev_get_queue() needs to check for a valid bd_disk pointer,
otherwise it'll dereference a NULL pointer.
Signed-off-by: Hannes Reinecke <hare@suse.de>
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index f94bc83..7e28aaa 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -794,7 +794,7 @@ extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
{
- return bdev->bd_disk->queue;
+ return bdev->bd_disk ? bdev->bd_disk->queue : NULL;
}
/*
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