在取消引用 NULL request->q 指针时,blk_mq_rq_timed_out() 崩溃。Raw BUG: unable to handle kernel NULL pointer dereference at 00000000000000d0 IP: [<ffffffff86d5f628>] blk_mq_rq_timed_out+0x18/0xa0 PGD 8000000035eae067 PUD 0 Oops: 0000 [#1] SMP CPU: 2 PID: 1041 Comm: kworker/2:...
RIP: 0010:[<ffffffff86d5f628>] [<ffffffff86d5f628>] blk_mq_rq_timed_out+0x18/0xa0 ... Call Trace: [<ffffffff86d5f70c>] blk_mq_check_expired+0x5c/0x60 [<ffffffff86d62be4>] bt_iter+0x54/0x60 [<ffffffff86d635eb>] blk_mq_queue_tag_busy_iter+0x13b/0x320 [<ffffffff86d...