Commits
Igor Konopko committed 751a0cc0cd3
nvme-pci: fix surprise removal
When a PCIe NVMe device is not present, nvme_dev_remove_admin() calls
blk_cleanup_queue() on the admin queue, which frees the hctx for that
queue. Moments later, on the same path nvme_kill_queues() calls
blk_mq_unquiesce_queue() on admin queue and tries to access hctx of it,
which leads to following OOPS:
Oops: 0000 [#1] SMP PTI
RIP: 0010:sbitmap_any_bit_set+0xb/0x40
Call Trace:
blk_mq_run_hw_queue+0xd5/0x150
blk_mq_run_hw_queues+0x3a/0x50
nvme_kill_queues+0x26/0x50
nvme_remove_namespaces+0xb2/0xc0
nvme_remove+0x60/0x140
pci_device_remove+0x3b/0xb0
Fixes: cb4bfda62afa2 ("nvme-pci: fix hot removal during error handling")
Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>