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nbd: fix nbd device deletion
authorJosef Bacik <jbacik@fb.com>
Wed, 16 May 2018 18:51:17 +0000 (14:51 -0400)
committerJens Axboe <axboe@kernel.dk>
Wed, 16 May 2018 18:54:06 +0000 (12:54 -0600)
commit8364da4751cf22201d74933d5e634176f44ed407
treefe9edb04edc9d882ab8a21fc64160b809481b425
parent3de9beeeb4ffc82c9745f095a6a26e0aef492379
nbd: fix nbd device deletion

This fixes a use after free bug, we shouldn't be doing disk->queue right
after we do del_gendisk(disk).  Save the queue and do the cleanup after
the del_gendisk.

Fixes: c6a4759ea0c9 ("nbd: add device refcounting")
cc: stable@vger.kernel.org
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/block/nbd.c