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net/mlx5: fix memory region cache lookup

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The Memory Region (MR) cache contains pointers to mlx5_mr.
The MR cache indexes are filled when a new MR is created. As it is
possible for MR to be created on the flight, an extra validation must be
added to avoid segmentation fault.

Fixes: b0b0938457 ("net/mlx5: use buffer address for LKEY search")
Cc: stable@dpdk.org

Signed-off-by: Xueming Li <xuemingl@mellanox.com>
Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
This commit is contained in:
Shahaf Shuler 2018-01-25 18:17:58 +02:00 committed by Ferruh Yigit
parent e313ef4c2f
commit 95086c6543
1 changed files with 2 additions and 1 deletions
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3
drivers/net/mlx5/mlx5_rxtx.h
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@ -555,7 +555,8 @@ mlx5_tx_mb2mr(struct mlx5_txq_data *txq, struct rte_mbuf *mb)
if (likely(txq->mp2mr[i]->start <= addr && txq->mp2mr[i]->end >= addr))
return txq->mp2mr[i]->lkey;
for (i = 0; (i != RTE_DIM(txq->mp2mr)); ++i) {
if (unlikely(txq->mp2mr[i]->mr == NULL)) {
if (unlikely(txq->mp2mr[i] == NULL ||
txq->mp2mr[i]->mr == NULL)) {
/* Unknown MP, add a new MR for it. */
break;
}