From e7c38157c61649e66f853d7b9f109119b8361448 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 19 Jul 2010 22:01:26 -0700
Subject: [PATCH] ipv6: Make IP6CB(skb)->nhoff 16-bit.
Even with jumbograms I cannot see any way in which we would need
to records a larger than 65535 valued next-header offset.
The maximum extension header length is (256 << 3) == 2048.
There are only a handful of extension headers specified which
we'd even accept (say 5 or 6), therefore the largest next-header
offset we'd ever have to contend with is something less than
say 16k.
Therefore make it a u16 instead of a u32.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/ipv6.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 940e21595351..ab9e9e89e407 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -246,7 +246,7 @@ struct inet6_skb_parm {
__u16 srcrt;
__u16 dst1;
__u16 lastopt;
- __u32 nhoff;
+ __u16 nhoff;
__u16 flags;
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
__u16 dsthao;
--
GitLab