redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

vti6: Fix memory leak of skb if input policy check fails 

commit 2a9de3af21 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: ed1efb2aef ("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>
5.4-rM2-2.2.x-imx-squashed
Torsten Hilbrich 2020-03-11 11:19:06 +01:00 committed by Greg Kroah-Hartman
parent 9c4f1506b4
commit d8166d4b42
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/ipv6/ip6_vti.c
View File

@ -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);