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ip_tunnel: Add missing validation of encap type to ip_tunnel_encap_setup() 

The encap->type comes straight from Netlink. Validate it against
max supported encap types just like ip_encap_hlen() already does.

Fixes: a8c5f9 ("ip_tunnel: Ops registration for secondary encap (fou, gue)")
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2014-12-16 21:05:21 +01:00 committed by David S. Miller
parent bb1553c800
commit f1fb521f7d
1 changed files with 3 additions and 0 deletions
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3
net/ipv4/ip_tunnel.c
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@ -573,6 +573,9 @@ int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t,
if (t->encap.type == TUNNEL_ENCAP_NONE)
return 0;
if (t->encap.type >= MAX_IPTUN_ENCAP_OPS)
return -EINVAL;
rcu_read_lock();
ops = rcu_dereference(iptun_encaps[t->encap.type]);
if (likely(ops && ops->build_header))