block: Check for valid bd_disk in bdev_get_queue()

PATCH New Hannes Reinecke 1 participant 1 message Jan 30, 2013 Block layer

lore

Share & tools

lore

Hannes Reinecke

author

2013-01-30 09:35 UTC #0 lore raw

PATCH 1/1 block: Check for valid bd_disk in bdev_get_queue()

bdev_get_queue() needs to check for a valid bd_disk pointer, otherwise it'll dereference a NULL pointer.

Signed-off-by Hannes Reinecke <[email protected]>

include/linux/blkdev.h +1 -1

index f94bc83..7e28aaa 100644
@@ -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;
 }
 
 /*