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net: Zero terminate ifr_name in dev_ifname(). 

The ifr.ifr_name is passed around and assumed to be NULL terminated.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-07-19 13:33:24 -07:00
parent 98de4e0ea4
commit 63679112c5
1 changed files with 1 additions and 0 deletions
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1
net/core/dev_ioctl.c
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@ -28,6 +28,7 @@ static int dev_ifname(struct net *net, struct ifreq __user *arg)
if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
return -EFAULT; return -EFAULT;
ifr.ifr_name[IFNAMSIZ-1] = 0;
error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex); error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex);
if (error) if (error)