diff options
| author | Chao Leng <lengchao@huawei.com> | 2020-10-12 16:55:37 +0800 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-10-22 15:27:14 +0200 |
| commit | a87da50f39d467f2ea4c1f98decb72ef6d87a31e (patch) | |
| tree | c4f96aeae1c458f64d70777eff20836d79394052 | |
| parent | 43efdb8e870ee0f58633fd579aa5b5185bf5d39e (diff) | |
nvme-rdma: fix crash due to incorrect cqe
A crash happened due to injecting error test.
When a CQE has incorrect command id due do an error injection, the host
may find a request which is already freed. Dereferencing req->mr->rkey
causes a crash in nvme_rdma_process_nvme_rsp because the mr is already
freed.
Add a check for the mr to fix it.
Signed-off-by: Chao Leng <lengchao@huawei.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/nvme/host/rdma.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 116902b1b2c3..aad829a2b50d 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -1730,10 +1730,11 @@ static void nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue, req->result = cqe->result; if (wc->wc_flags & IB_WC_WITH_INVALIDATE) { - if (unlikely(wc->ex.invalidate_rkey != req->mr->rkey)) { + if (unlikely(!req->mr || + wc->ex.invalidate_rkey != req->mr->rkey)) { dev_err(queue->ctrl->ctrl.device, "Bogus remote invalidation for rkey %#x\n", - req->mr->rkey); + req->mr ? req->mr->rkey : 0); nvme_rdma_error_recovery(queue->ctrl); } } else if (req->mr) { |