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sit: fix an oops when IFLA_IPTUN_PROTO is not set

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The use of this attribute has been added in 32b8a8e59c (sit: add IPv4 over
IPv4 support). It is optional, by default proto is IPPROTO_IPV6.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Dichtel 2013-06-19 12:03:13 +02:00 committed by David S. Miller
parent eea86af6b1
commit c2ff682a6f
1 changed files with 1 additions and 1 deletions
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net/ipv6/sit.c
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@ -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]);