On Fri, 2018-04-13 at 12:03 -0400, Josef Bacik wrote: > This fixes a use after free bug, we need to do the del_gendisk after we > cleanup the queue on the device. Hello Josef, Which use-after-free bug does this patch fix? Are you aware that most block drivers call blk_cleanup_queue() before calling del_gendisk()? Why do you think that the nbd driver should use the opposite order? Thanks, Bart.