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alistair23-linux
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nvme-rdma: 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: 4c174e6366 ("nvme-rdma: fix timeout handler")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
hifive-unleashed-5.2
Sagi Grimberg 2019-04-24 11:53:18 -07:00 committed by Christoph Hellwig
parent 7a42589654
commit 1007709d7d
1 changed files with 6 additions and 4 deletions
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10
drivers/nvme/host/rdma.c
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@ -914,8 +914,9 @@ static void nvme_rdma_teardown_admin_queue(struct nvme_rdma_ctrl *ctrl,
{
blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
nvme_rdma_stop_queue(&ctrl->queues[0]);
blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, nvme_cancel_request,
&ctrl->ctrl);
if (ctrl->ctrl.admin_tagset)
blk_mq_tagset_busy_iter(ctrl->ctrl.admin_tagset,
nvme_cancel_request, &ctrl->ctrl);
blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
nvme_rdma_destroy_admin_queue(ctrl, remove);
}
@ -926,8 +927,9 @@ static void nvme_rdma_teardown_io_queues(struct nvme_rdma_ctrl *ctrl,
if (ctrl->ctrl.queue_count > 1) {
nvme_stop_queues(&ctrl->ctrl);
nvme_rdma_stop_io_queues(ctrl);
blk_mq_tagset_busy_iter(&ctrl->tag_set, nvme_cancel_request,
&ctrl->ctrl);
if (ctrl->ctrl.tagset)
blk_mq_tagset_busy_iter(ctrl->ctrl.tagset,
nvme_cancel_request, &ctrl->ctrl);
if (remove)
nvme_start_queues(&ctrl->ctrl);
nvme_rdma_destroy_io_queues(ctrl, remove);