diff options
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 532425db11fe..1334fc174bcf 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -539,12 +539,15 @@ done: case IPV6_MULTICAST_IF: if (sk->sk_type == SOCK_STREAM) goto e_inval; - if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) - goto e_inval; - if (__dev_get_by_index(&init_net, val) == NULL) { - retv = -ENODEV; - break; + if (val) { + if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) + goto e_inval; + + if (__dev_get_by_index(&init_net, val) == NULL) { + retv = -ENODEV; + break; + } } np->mcast_oif = val; retv = 0; |