[dpdk-dev] [PATCH] net/mlx5: fix packet type and offload flags in Rx

[Maxime Leroy]

In mlx5 rx function, the packet_type and ol_flags mbuf fields are not
properly initialized when no rx offload feature is enabled (checksum, l2
tun checksum, vlan_strip, crc). Thus, these fields can have a value
different of 0 depending on their value when the mbuf was freed.

This can result in an incorrect application behavior if invalid
ol_flags/ptype are set, or memory corruptions if IND_ATTACHED_MBUF is
set in ol_flags.

Fixes: 081f7eae242e ("mlx5: process offload flags only when requested")

Signed-off-by: Maxime Leroy <maxime.leroy at 6wind.com>
---
 drivers/net/mlx5/mlx5_rxtx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index 0c352f3f..4132fd74 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -1599,6 +1599,8 @@ mlx5_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
 			pkt = seg;
 			assert(len >= (rxq->crc_present << 2));
 			/* Update packet information. */
+			pkt->packet_type = 0;
+			pkt->ol_flags = 0;
 			if (rxq->csum | rxq->csum_l2tun | rxq->vlan_strip |
 			    rxq->crc_present) {
 				if (rxq->csum) {
-- 
2.1.4