From 36ffb5708649eb5215c14548d692406bc287cb24 Mon Sep 17 00:00:00 2001 From: Hannes Frederic Sowa Date: Fri, 13 Dec 2013 15:12:27 +0100 Subject: ipv6: fix illegal mac_header comparison on 32bit Signed-off-by: Hannes Frederic Sowa Signed-off-by: Greg Kroah-Hartman --- include/linux/skbuff.h | 5 +++++ net/ipv6/udp_offload.c | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 74db47ec09e..ded45ec6b22 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1741,6 +1741,11 @@ static inline void skb_set_mac_header(struct sk_buff *skb, const int offset) } #endif /* NET_SKBUFF_DATA_USES_OFFSET */ +static inline void skb_pop_mac_header(struct sk_buff *skb) +{ + skb->mac_header = skb->network_header; +} + static inline void skb_probe_transport_header(struct sk_buff *skb, const int offset_hint) { diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c index 76f165ef8d4..3696aa28784 100644 --- a/net/ipv6/udp_offload.c +++ b/net/ipv6/udp_offload.c @@ -85,7 +85,7 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, /* Check if there is enough headroom to insert fragment header. */ tnl_hlen = skb_tnl_header_len(skb); - if (skb->mac_header < (tnl_hlen + frag_hdr_sz)) { + if (skb_mac_header(skb) < skb->head + tnl_hlen + frag_hdr_sz) { if (gso_pskb_expand_head(skb, tnl_hlen + frag_hdr_sz)) goto out; } -- cgit v1.2.3