[PATCH 1/2] net/iavf: check illegal packets

[Kevin Liu]

Some illegal packets will lead to TX/RX hang and
can't recover automatically. This patch check those
illegal packets and protect TX/RX from hanging.

Fixes: a2b29a7733ef ("net/avf: enable basic Rx Tx")
Signed-off-by: Kevin Liu <kevinx.liu at intel.com>
---
 drivers/net/iavf/iavf_rxtx.c | 10 +++++++++-
 drivers/net/iavf/iavf_rxtx.h |  2 ++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index 3deabe1d7e..8ddd809f94 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -2877,7 +2877,8 @@ iavf_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
 
 		/* Check condition for nb_segs > IAVF_TX_MAX_MTU_SEG. */
 		if (!(ol_flags & RTE_MBUF_F_TX_TCP_SEG)) {
-			if (m->nb_segs > IAVF_TX_MAX_MTU_SEG) {
+			if (m->nb_segs > IAVF_TX_MAX_MTU_SEG ||
+				m->pkt_len > IAVF_FRAME_SIZE_MAX) {
 				rte_errno = EINVAL;
 				return i;
 			}
@@ -2893,6 +2894,13 @@ iavf_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
 			return i;
 		}
 
+		/* check the size of packet */
+		if (m->pkt_len < IAVF_TX_MIN_PKT_LEN) {
+			rte_errno = EINVAL;
+			PMD_DRV_LOG(ERR, "INVALID mbuf: bad pkt_len=[%hu]", m->pkt_len);
+			return i;
+		}
+
 #ifdef RTE_ETHDEV_DEBUG_TX
 		ret = rte_validate_tx_offload(m);
 		if (ret != 0) {
diff --git a/drivers/net/iavf/iavf_rxtx.h b/drivers/net/iavf/iavf_rxtx.h
index 1695e43cd5..bb9083c699 100644
--- a/drivers/net/iavf/iavf_rxtx.h
+++ b/drivers/net/iavf/iavf_rxtx.h
@@ -53,6 +53,8 @@
 #define IAVF_TSO_MAX_SEG          UINT8_MAX
 #define IAVF_TX_MAX_MTU_SEG       8
 
+#define IAVF_TX_MIN_PKT_LEN 17
+
 #define IAVF_TX_CKSUM_OFFLOAD_MASK (		 \
 		RTE_MBUF_F_TX_IP_CKSUM |		 \
 		RTE_MBUF_F_TX_L4_MASK |		 \
-- 
2.25.1