From: "David S. Miller" <davem@davemloft.net>
Date: Wed, 19 Jul 2017 13:33:24 -0700
Subject: [PATCH] net: Zero terminate ifr_name in dev_ifname().
References: bnc#1060662
Patch-mainline: 4.12.6
Git-commit: 63679112c536289826fec61c917621de95ba2ade
[ Upstream commit 63679112c536289826fec61c917621de95ba2ade ]
The ifr.ifr_name is passed around and assumed to be NULL terminated.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
net/core/dev_ioctl.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index 434413f1074a..18f9cb9aa87d 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -28,6 +28,7 @@ static int dev_ifname(struct net *net, struct ifreq __user *arg)
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
return -EFAULT;
+ ifr.ifr_name[IFNAMSIZ-1] = 0;
error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex);
if (error)
--
2.14.2