From: Steffen Klassert <steffen.klassert@secunet.com>
To: David Miller <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
Steffen Klassert <steffen.klassert@secunet.com>,
<netdev@vger.kernel.org>
Subject: [PATCH 7/8] vti6: Fix memory leak of skb if input policy check fails
Date: Fri, 27 Mar 2020 09:10:06 +0100 [thread overview]
Message-ID: <20200327081007.1185-8-steffen.klassert@secunet.com> (raw)
In-Reply-To: <20200327081007.1185-1-steffen.klassert@secunet.com>
From: Torsten Hilbrich <torsten.hilbrich@secunet.com>
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>
---
net/ipv6/ip6_vti.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c
index 56e642efefff..cc6180e08a4f 100644
--- 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);
--
2.17.1
next prev parent reply other threads:[~2020-03-27 8:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-27 8:09 pull request (net): ipsec 2020-03-27 Steffen Klassert
2020-03-27 8:10 ` [PATCH 1/8] xfrm: handle NETDEV_UNREGISTER for xfrm device Steffen Klassert
2020-03-27 8:10 ` [PATCH 2/8] vti[6]: fix packet tx through bpf_redirect() in XinY cases Steffen Klassert
2020-03-27 8:10 ` [PATCH 3/8] xfrm: fix uctx len check in verify_sec_ctx_len Steffen Klassert
2020-03-27 8:10 ` [PATCH 4/8] xfrm: add the missing verify_sec_ctx_len check in xfrm_add_acquire Steffen Klassert
2020-03-27 8:10 ` [PATCH 5/8] ipv6: xfrm6_tunnel.c: Use built-in RCU list checking Steffen Klassert
2020-03-27 8:10 ` [PATCH 6/8] esp: remove the skb from the chain when it's enqueued in cryptd_wq Steffen Klassert
2020-03-27 8:10 ` Steffen Klassert [this message]
2020-03-27 8:10 ` [PATCH 8/8] xfrm: policy: Fix doulbe free in xfrm_policy_timer Steffen Klassert
2020-03-27 21:57 ` pull request (net): ipsec 2020-03-27 David Miller
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