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mlx4: fix possible crash on scattered mbuf allocation failure

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When failing to allocate a segment, mlx4_rx_burst_sp() may call
rte_pktmbuf_free() on an incomplete scattered mbuf whose next pointer
in the last segment is not set.

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
This commit is contained in:
Adrien Mazarguil 2015-06-30 11:27:47 +02:00 committed by Thomas Monjalon
parent c55e94f560
commit 53bbf5afbd
1 changed files with 3 additions and 1 deletions
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4
drivers/net/mlx4/mlx4.c
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@ -2370,8 +2370,10 @@ mlx4_rx_burst_sp(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
DEBUG("rxq=%p, wr_id=%" PRIu64 ":"
" can't allocate a new mbuf",
(void *)rxq, wr_id);
if (pkt_buf != NULL)
if (pkt_buf != NULL) {
*pkt_buf_next = NULL;
rte_pktmbuf_free(pkt_buf);
}
/* Increase out of memory counters. */
++rxq->stats.rx_nombuf;
++rxq->priv->dev->data->rx_mbuf_alloc_failed;