From c2ff682a6f5c5ae2cb23b32bb4fd7a6fb059d4fc Mon Sep 17 00:00:00 2001 From: Nicolas Dichtel Date: Wed, 19 Jun 2013 12:03:13 +0200 Subject: [PATCH] sit: fix an oops when IFLA_IPTUN_PROTO is not set The use of this attribute has been added in 32b8a8e59c9c (sit: add IPv4 over IPv4 support). It is optional, by default proto is IPPROTO_IPV6. Signed-off-by: Nicolas Dichtel Signed-off-by: David S. Miller --- net/ipv6/sit.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 6cee844678e2..f639866b3dcf 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1296,7 +1296,7 @@ static int ipip6_validate(struct nlattr *tb[], struct nlattr *data[]) { u8 proto; - if (!data) + if (!data || !data[IFLA_IPTUN_PROTO]) return 0; proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); -- GitLab