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| author |   Steffen Klassert <steffen.klassert@secunet.com> | 2011-06-29 23:20:41 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-07-01 17:33:19 -0700 |
| commit | b00897b881f775040653955fda99dcf7c167b382 (patch) | |
| tree | 95462798585771d75f9a3febe9b2145414f942c4 /net/ipv4 | |
| parent | ipv4: Don't use ufo handling on later transformed packets (diff) | |
| download | linux-dev-b00897b881f775040653955fda99dcf7c167b382.tar.xz linux-dev-b00897b881f775040653955fda99dcf7c167b382.zip | |
xfrm4: Don't call icmp_send on local error
Calling icmp_send() on a local message size error leads to
an incorrect update of the path mtu. So use ip_local_error()
instead to notify the socket about the error.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/xfrm4_output.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c index 2d51840e53a1..327a617d594c 100644 --- a/net/ipv4/xfrm4_output.c +++ b/net/ipv4/xfrm4_output.c @@ -32,7 +32,12 @@ static int xfrm4_tunnel_check_size(struct sk_buff *skb) dst = skb_dst(skb); mtu = dst_mtu(dst); if (skb->len > mtu) { - icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); + if (skb->sk) + ip_local_error(skb->sk, EMSGSIZE, ip_hdr(skb)->daddr, + inet_sk(skb->sk)->inet_dport, mtu); + else + icmp_send(skb, ICMP_DEST_UNREACH, + ICMP_FRAG_NEEDED, htonl(mtu)); ret = -EMSGSIZE; } out: |