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nvme-tcp: fix possible null deref on a timed out io queue connect 

If I/O queue connect times out, we might have freed the queue socket
already, so check for that on the error path in nvme_tcp_start_queue.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2019-04-29 16:25:48 -07:00 committed by Christoph Hellwig
parent 2d5abb9a1e
commit f34e25898a
1 changed files with 2 additions and 1 deletions
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3
drivers/nvme/host/tcp.c
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@ -1423,7 +1423,8 @@ static int nvme_tcp_start_queue(struct nvme_ctrl *nctrl, int idx)
if (!ret) {
set_bit(NVME_TCP_Q_LIVE, &ctrl->queues[idx].flags);
} else {
__nvme_tcp_stop_queue(&ctrl->queues[idx]);
if (test_bit(NVME_TCP_Q_ALLOCATED, &ctrl->queues[idx].flags))
__nvme_tcp_stop_queue(&ctrl->queues[idx]);
dev_err(nctrl->device,
"failed to connect queue: %d ret=%d\n", idx, ret);
}