-----Original Message-----
From: Stephen Hemminger <step...@networkplumber.org>
Date: Tuesday, May 12, 2020 at 1:40 PM
To: Yong Wang <yongw...@vmware.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>, Stephen Hemminger
<step...@networkplumber.org>
Subject: [PATCH] net/vmxnet3: handle bad host framing
The VMXNet3 protocol has a start-of-packet (SOP) and end-of-packet (EOP)
marker. If there was a bug where mbuf arrived without SOP the code
that chains the mbuf would dereference a null pointer.
Also, record any mbuf's dropped in statistics.
Although did the initial code no longer have access to VMware.
Compile tested only!
Coverity issue: 124563
Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
---
<Acked-by> Yong Wang <yongw...@vmware.com>
drivers/net/vmxnet3/vmxnet3_rxtx.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c
b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index dd99684bee4d..73e270f30f00 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -950,13 +950,17 @@ vmxnet3_recv_pkts(void *rx_queue, struct rte_mbuf
**rx_pkts, uint16_t nb_pkts)
RTE_ASSERT(rxd->btype == VMXNET3_RXD_BTYPE_BODY);
- if (rxm->data_len) {
+ if (likely(start && rxm->data_len > 0)) {
start->pkt_len += rxm->data_len;
start->nb_segs++;
rxq->last_seg->next = rxm;
rxq->last_seg = rxm;
} else {
+ PMD_RX_LOG(ERR, "Error received empty or out of
order frame.");
+ rxq->stats.drop_total++;
+ rxq->stats.drop_err++;
+
rte_pktmbuf_free_seg(rxm);
}
}
--
2.20.1
