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Date:	Tue, 28 Nov 2006 20:25:35 -0800 (PST)
From:	David Miller <>
Subject: Re: Broken commit: [NETFILTER]: ipt_REJECT: remove largely
 duplicate route_reverse function

From: Patrick McHardy <>
Date: Wed, 29 Nov 2006 03:28:25 +0100

> [NETFILTER]: ipt_REJECT: fix memory corruption
> On devices with hard_header_len > LL_MAX_HEADER ip_route_me_harder()
> reallocates the skb, leading to memory corruption when using the stale
> tcph pointer to update the checksum.
> Signed-off-by: Patrick McHardy <>

Applied, thanks Patrick.

And based upon your discovery wrt. MAX_HEADER I'm also
applying the following.

commit 93e3a20d6c67a09b867431e7d5b3e7bc97154fab
Author: David S. Miller <>
Date:   Tue Nov 28 20:24:10 2006 -0800

    [NET]: Fix MAX_HEADER setting.
    MAX_HEADER is either set to LL_MAX_HEADER or LL_MAX_HEADER + 48, and
    this is controlled by a set of CONFIG_* ifdef tests.
    It is trying to use LL_MAX_HEADER + 48 when any of the tunnels are
    enabled which set hard_header_len like this:
    dev->hard_header_len = LL_MAX_HEADER + sizeof(struct xxx);
    The correct set of tunnel drivers which do this are:
    so make the ifdef test match.
    Noticed by Patrick McHardy.
    Signed-off-by: David S. Miller <>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 9264139..95e86ac 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -94,7 +94,9 @@ #endif
 #if !defined(CONFIG_NET_IPIP) && \
-    !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
+    !defined(CONFIG_NET_IPGRE) && \
+    !defined(CONFIG_IPV6_SIT) && \
+    !defined(CONFIG_IPV6_TUNNEL)
 #define MAX_HEADER (LL_MAX_HEADER + 48)
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