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nvmet-rdma: fix response use after free

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nvmet_rdma_release_rsp() may free the response before using it at error
flow.

Fixes: 8407879 ("nvmet-rdma: fix possible bogus dereference under heavy load")
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Israel Rukshin 2018-12-05 16:54:57 +00:00 committed by Christoph Hellwig
parent 86880d6461
commit d7dcdf9d4e
1 changed files with 2 additions and 1 deletions
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3
drivers/nvme/target/rdma.c
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@ -529,6 +529,7 @@ static void nvmet_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc)
{
struct nvmet_rdma_rsp *rsp =
container_of(wc->wr_cqe, struct nvmet_rdma_rsp, send_cqe);
struct nvmet_rdma_queue *queue = cq->cq_context;
nvmet_rdma_release_rsp(rsp);
@ -536,7 +537,7 @@ static void nvmet_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc)
wc->status != IB_WC_WR_FLUSH_ERR)) {
pr_err("SEND for CQE 0x%p failed with status %s (%d).\n",
wc->wr_cqe, ib_wc_status_msg(wc->status), wc->status);
nvmet_rdma_error_comp(rsp->queue);
nvmet_rdma_error_comp(queue);
}
}