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authorSteffen Klassert <steffen.klassert@secunet.com>2015-01-12 13:38:49 +0100
committerSteffen Klassert <steffen.klassert@secunet.com>2015-02-09 11:14:17 +0100
commit044a832a7779c0638bea2d0fea901c055b995f4a (patch)
treedede82b9efbd76456e5cc88723763330f29539a5 /net/ipv4/xfrm4_output.c
parentxfrm6: Fix a offset value for network header in _decode_session6 (diff)
downloadlinux-dev-044a832a7779c0638bea2d0fea901c055b995f4a.tar.xz
linux-dev-044a832a7779c0638bea2d0fea901c055b995f4a.zip
xfrm: Fix local error reporting crash with interfamily tunnels
We set the outer mode protocol too early. As a result, the local error handler might dispatch to the wrong address family and report the error to a wrong socket type. We fix this by setting the outer protocol to the skb after we accessed the inner mode for the last time, right before we do the atcual encapsulation where we switch finally to the outer mode. Reported-by: Chris Ruehl <chris.ruehl@gtsys.com.hk> Tested-by: Chris Ruehl <chris.ruehl@gtsys.com.hk> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/ipv4/xfrm4_output.c')
-rw-r--r--net/ipv4/xfrm4_output.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index d5f6bd9a210a..dab73813cb92 100644
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -63,6 +63,7 @@ int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
return err;
IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
+ skb->protocol = htons(ETH_P_IP);
return x->outer_mode->output2(x, skb);
}
@@ -71,7 +72,6 @@ EXPORT_SYMBOL(xfrm4_prepare_output);
int xfrm4_output_finish(struct sk_buff *skb)
{
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
- skb->protocol = htons(ETH_P_IP);
#ifdef CONFIG_NETFILTER
IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED;