diff options
| author | Omar Sandoval <osandov@fb.com> | 2017-01-09 11:44:12 -0800 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-09-10 16:36:06 -0400 |
| commit | 1ca4367b55f22e04b7b2d59bfe9020ea4db4f808 (patch) | |
| tree | 912eaed6780d35863020a5f3a71c4efcd3731f59 /drivers | |
| parent | e07b3b23b69873f49b30879b7df0cb17347ae0c6 (diff) | |
virtio_blk: fix panic in initialization error path
[ Upstream commit 6bf6b0aa3da84a3d9126919a94c49c0fb7ee2fb3 ]
If blk_mq_init_queue() returns an error, it gets assigned to
vblk->disk->queue. Then, when we call put_disk(), we end up calling
blk_put_queue() with the ERR_PTR, causing a bad dereference. Fix it by
only assigning to vblk->disk->queue on success.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/virtio_blk.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 5ea2f0bbbc7c..071c3ea70882 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -642,11 +642,12 @@ static int virtblk_probe(struct virtio_device *vdev) if (err) goto out_put_disk; - q = vblk->disk->queue = blk_mq_init_queue(&vblk->tag_set); + q = blk_mq_init_queue(&vblk->tag_set); if (IS_ERR(q)) { err = -ENOMEM; goto out_free_tags; } + vblk->disk->queue = q; q->queuedata = vblk; |