[dpdk-dev] [PATCH 2/2] vhost: fix async enqueue accessing uninitialized variables

[Marvin Liu]

This patch fixs coverity issue in async enqueue function by adding
initialization step before using temporary virtio header.

Coverity issue: 366123
Fixes: cd6760da1076 ("vhost: introduce async enqueue for split ring")
Cc: stable at dpdk.org

Signed-off-by: Marvin Liu <yong.liu at intel.com>

diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 48b013a9b4..ff39878609 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -986,9 +986,10 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq,
 
 	hdr_mbuf = m;
 	hdr_addr = buf_addr;
-	if (unlikely(buf_len < dev->vhost_hlen))
+	if (unlikely(buf_len < dev->vhost_hlen)) {
+		memset(&tmp_hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf));
 		hdr = &tmp_hdr;
-	else
+	} else
 		hdr = (struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)hdr_addr;
 
 	VHOST_LOG_DATA(DEBUG, "(%d) RX: num merge buffers %d\n",
-- 
2.17.1