path: root/net/ipv6/xfrm6_output.c
diff options
authorSteffen Klassert <steffen.klassert@secunet.com>2015-10-19 10:30:05 +0200
committerSteffen Klassert <steffen.klassert@secunet.com>2015-10-19 10:30:05 +0200
commitca064bd89363a6e7e71b1c5226ff1b718957a9d4 (patch)
tree4c40ed6e576810be7c1282e875cd132c422733f9 /net/ipv6/xfrm6_output.c
parentxfrm: Fix state threshold configuration from userspace (diff)
xfrm: Fix pmtu discovery for local generated packets.
Commit 044a832a777 ("xfrm: Fix local error reporting crash with interfamily tunnels") moved the setting of skb->protocol behind the last access of the inner mode family to fix an interfamily crash. Unfortunately now skb->protocol might not be set at all, so we fail dispatch to the inner address family. As a reault, the local error handler is not called and the mtu value is not reported back to userspace. We fix this by setting skb->protocol on message size errors before we call xfrm_local_error. Fixes: 044a832a7779c ("xfrm: Fix local error reporting crash with interfamily tunnels") Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/ipv6/xfrm6_output.c')
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index be033f22a3f3..e15feb7b413d 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -79,6 +79,7 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb)
if (!skb->ignore_df && skb->len > mtu) {
skb->dev = dst->dev;
+ skb->protocol = htons(ETH_P_IPV6);
if (xfrm6_local_dontfrag(skb))
xfrm6_local_rxpmtu(skb, mtu);