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From: SebastianX Basierski <sebastianx.basierski@intel.com>
To: skhare@vmware.com
Cc: SebastianX Basierski <sebastianx.basierski@intel.com>,
	jianfeng.tan@intel.com, dev@dpdk.org
Subject: [dpdk-dev] [PATCH] pmd_virtio: Buffer not null terminated
Date: Tue, 19 Sep 2017 13:41:04 +0200	[thread overview]
Message-ID: <1505821264-33518-1-git-send-email-sebastianx.basierski@intel.com> (raw)

Fix calling strncpy with the a maximum size equal of destination
array size.

Coverity issue: 140732

Fixes: e3b434818bbb ("net/virtio-user: support kernel vhost")
Cc: jianfeng.tan@intel.com
cc: dev@dpdk.org

Signed-off-by: SebastianX Basierski <sebastianx.basierski@intel.com>
---
 drivers/net/virtio/virtio_user/vhost_kernel_tap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
index f585de8..689a5cf 100644
--- a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
+++ b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
@@ -95,9 +95,9 @@ vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq)
 		ifr.ifr_flags |= IFF_MULTI_QUEUE;
 
 	if (*p_ifname)
-		strncpy(ifr.ifr_name, *p_ifname, IFNAMSIZ);
+		strncpy(ifr.ifr_name, *p_ifname, IFNAMSIZ - 1);
 	else
-		strncpy(ifr.ifr_name, "tap%d", IFNAMSIZ);
+		strncpy(ifr.ifr_name, "tap%d", IFNAMSIZ - 1);
 	if (ioctl(tapfd, TUNSETIFF, (void *)&ifr) == -1) {
 		PMD_DRV_LOG(ERR, "TUNSETIFF failed: %s", strerror(errno));
 		goto error;
-- 
2.7.4

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             reply	other threads:[~2017-09-19 11:47 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-19 11:41 SebastianX Basierski [this message]
2017-09-20  0:52 ` Tan, Jianfeng
2017-09-20  9:19   ` Basierski, SebastianX
2017-09-20  9:41     ` Tan, Jianfeng
2017-10-09  3:07 ` Yuanhan Liu

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