From: Herbert Xu <herb...@gondor.apana.org.au>
commit 0aa68271510ae2b221d4b60892103837be63afe4 upstream.
Currently we disallow GSO packets on the IPv6 forward path.
This patch fixes this.
Note that I discovered that our existing GSO MTU checks (e.g.,
IPv4 forwarding) are buggy in that they skip the check altogether,
when they really should be checking gso_size + header instead.
I have also been lazy here in that I haven't bothered to segment
the GSO packet by hand before generating an ICMP message. Someone
should add that to be 100% correct.
Reported-by: Ralf Baechle <r...@linux-mips.org>
Signed-off-by: Herbert Xu <herb...@gondor.apana.org.au>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Apollon Oikonomopoulos <apoi...@gmail.com>
Signed-off-by: Faidon Liambotis <parav...@debian.org>
---
net/ipv6/ip6_output.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index eca3ef7..9ad5792 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -510,7 +510,7 @@ int ip6_forward(struct sk_buff *skb)
}
}
- if (skb->len > dst_mtu(dst)) {
+ if (skb->len > dst_mtu(dst) && !skb_is_gso(skb)) {
/* Again, force OUTPUT device used as source address */
skb->dev = dst->dev;
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, dst_mtu(dst), skb->dev);
--
1.7.5.4
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