[dpdk-dev] [PATCH] pcap: Fixed bug in eth_pcap_rx function

Pablo de Lara pablo.de.lara.guarch at intel.com
Tue Aug 5 12:18:20 CEST 2014

Normally, bufs[i] stores the mbuf pointer, the index of buf[i]
is the loop count i, but if header.len > buf_size, DPDK will
free the mbuf, but the loop count i still increases, so some
of the items in bufs[] might be NULL ponter, causing a potential
DPDK core. Using num_rx as the index for bufs[] solves the problem.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>
 lib/librte_pmd_pcap/rte_eth_pcap.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/librte_pmd_pcap/rte_eth_pcap.c b/lib/librte_pmd_pcap/rte_eth_pcap.c
index c77ee25..eebe768 100644
--- a/lib/librte_pmd_pcap/rte_eth_pcap.c
+++ b/lib/librte_pmd_pcap/rte_eth_pcap.c
@@ -154,7 +154,7 @@ eth_pcap_rx(void *queue,
 			rte_memcpy(mbuf->pkt.data, packet, header.len);
 			mbuf->pkt.data_len = (uint16_t)header.len;
 			mbuf->pkt.pkt_len = mbuf->pkt.data_len;
-			bufs[i] = mbuf;
+			bufs[num_rx] = mbuf;
 		} else {
 			/* pcap packet will not fit in the mbuf, so drop packet */

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