From: Josef Bacik jbacik@fb.com
This fixes a use after free bug, we need to do the del_gendisk after we cleanup the queue on the device.
Fixes: c6a4759ea0c9 ("nbd: add device refcounting") cc: stable@vger.kernel.org Signed-off-by: Josef Bacik jbacik@fb.com --- drivers/block/nbd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 86258b00a1d4..e33da3e6aa20 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -174,8 +174,8 @@ static void nbd_dev_remove(struct nbd_device *nbd) { struct gendisk *disk = nbd->disk; if (disk) { - del_gendisk(disk); blk_cleanup_queue(disk->queue); + del_gendisk(disk); blk_mq_free_tag_set(&nbd->tag_set); disk->private_data = NULL; put_disk(disk);