Commit 7a425896 authored by Sagi Grimberg's avatar Sagi Grimberg Committed by Christoph Hellwig

nvme-tcp: fix a NULL deref when an admin connect times out

If we timeout the admin startup sequence we might not yet have
an I/O tagset allocated which causes the teardown sequence to crash.
Make nvme_tcp_teardown_io_queues safe by not iterating inflight tags
if the tagset wasn't allocated.

Fixes: 39d57757 ("nvme-tcp: fix timeout handler")
Signed-off-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 569b3d3d
...@@ -1710,7 +1710,9 @@ static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl, ...@@ -1710,7 +1710,9 @@ static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl,
{ {
blk_mq_quiesce_queue(ctrl->admin_q); blk_mq_quiesce_queue(ctrl->admin_q);
nvme_tcp_stop_queue(ctrl, 0); nvme_tcp_stop_queue(ctrl, 0);
blk_mq_tagset_busy_iter(ctrl->admin_tagset, nvme_cancel_request, ctrl); if (ctrl->admin_tagset)
blk_mq_tagset_busy_iter(ctrl->admin_tagset,
nvme_cancel_request, ctrl);
blk_mq_unquiesce_queue(ctrl->admin_q); blk_mq_unquiesce_queue(ctrl->admin_q);
nvme_tcp_destroy_admin_queue(ctrl, remove); nvme_tcp_destroy_admin_queue(ctrl, remove);
} }
...@@ -1722,7 +1724,9 @@ static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl, ...@@ -1722,7 +1724,9 @@ static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl,
return; return;
nvme_stop_queues(ctrl); nvme_stop_queues(ctrl);
nvme_tcp_stop_io_queues(ctrl); nvme_tcp_stop_io_queues(ctrl);
blk_mq_tagset_busy_iter(ctrl->tagset, nvme_cancel_request, ctrl); if (ctrl->tagset)
blk_mq_tagset_busy_iter(ctrl->tagset,
nvme_cancel_request, ctrl);
if (remove) if (remove)
nvme_start_queues(ctrl); nvme_start_queues(ctrl);
nvme_tcp_destroy_io_queues(ctrl, remove); nvme_tcp_destroy_io_queues(ctrl, remove);
......
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