nvme-apple: Destroy the admin queue on removal
In the Linux kernel, the following vulnerability has been resolved: nvme-apple: Destroy the admin queue on removal The admin queue is allocated with blk_mq_alloc_queue() but never destroyed. nvme_free_ctrl() only drops the last reference and blk_mq_exit_queue() and blk_sync_queue() never run: the hctx is never moved to q->unused_hctx_list and the timeout timer and work stay armed on a queue that is about to be freed which will eventually oops inside blk_mq_timeout_work(). This can only be triggered when the controller fails to come up and is then immediately torn down again which is why no one ever ran into this before. Let's just copy wh