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From: Marvin Liu <yong.liu@intel.com>
To: maxime.coquelin@redhat.com, chenbo.xia@intel.com
Cc: dev@dpdk.org, Marvin Liu <yong.liu@intel.com>, stable@dpdk.org
Subject: [dpdk-dev] [PATCH] vhost: fix accessing uninitialized variables
Date: Wed,  3 Mar 2021 15:27:55 +0800	[thread overview]
Message-ID: <20210303072755.82979-1-yong.liu@intel.com> (raw)

This patch fixs coverity issue by adding initialization step before
using temporary virtio header.

Coverity issue: 366181, 366123
Fixes: fb3815cc614d ("vhost: handle virtually non-contiguous buffers in Rx-mrg")
Cc: stable@dpdk.org

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

diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 583bf379c6..fe464b3088 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -808,9 +808,10 @@ copy_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",

             reply	other threads:[~2021-03-03  7:28 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-03  7:27 Marvin Liu [this message]
2021-03-24  9:54 ` Maxime Coquelin
2021-03-27 10:06   ` wangyunjian
2021-03-29  1:44     ` Liu, Yong
2021-04-06  6:17 ` Xia, Chenbo
2021-04-07  2:48   ` Liu, Yong

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