diff options
Diffstat (limited to 'drivers/net/tun.c')
-rw-r--r-- | drivers/net/tun.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index e685c84ebe3a..603530e6cd7b 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -3010,10 +3010,11 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd, struct net *net = sock_net(&tfile->sk); struct tun_struct *tun; void __user* argp = (void __user*)arg; - unsigned int ifindex, carrier; + unsigned int carrier; struct ifreq ifr; kuid_t owner; kgid_t group; + int ifindex; int sndbuf; int vnet_hdr_sz; int le; @@ -3069,7 +3070,9 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd, ret = -EFAULT; if (copy_from_user(&ifindex, argp, sizeof(ifindex))) goto unlock; - + ret = -EINVAL; + if (ifindex < 0) + goto unlock; ret = 0; tfile->ifindex = ifindex; goto unlock; |