From: Torsten Hilbrich torsten.hilbrich@secunet.com
commit 2a9de3af21aa8c31cd68b0b39330d69f8c1e59df upstream.
The vti6_rcv function performs some tests on the retrieved tunnel including checking the IP protocol, the XFRM input policy, the source and destination address.
In all but one places the skb is released in the error case. When the input policy check fails the network packet is leaked.
Using the same goto-label discard in this case to fix this problem.
Fixes: ed1efb2aefbb ("ipv6: Add support for IPsec virtual tunnel interfaces") Signed-off-by: Torsten Hilbrich torsten.hilbrich@secunet.com Reviewed-by: Nicolas Dichtel nicolas.dichtel@6wind.com Signed-off-by: Steffen Klassert steffen.klassert@secunet.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/ipv6/ip6_vti.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv6/ip6_vti.c +++ b/net/ipv6/ip6_vti.c @@ -311,7 +311,7 @@ static int vti6_rcv(struct sk_buff *skb)
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) { rcu_read_unlock(); - return 0; + goto discard; }
ipv6h = ipv6_hdr(skb);