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authorPravin B Shelar <pshelar@nicira.com>2013-05-02 16:14:19 +0000
committerDavid S. Miller <davem@davemloft.net>2013-05-03 16:08:58 -0400
commit9b3eb5edf33897dc9128aa27300066153d4f8b9c (patch)
treef4881f9cc2e54a7741ba4b0ef9e04e4094c2c43d /net/ipv4/gre.c
parent83401eb4990ff6af55aeed8f49681558544192e6 (diff)
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gre: Fix GREv4 TCPv6 segmentation.
For ipv6 traffic, GRE can generate packet with strange GSO bits, e.g. ipv4 packet with SKB_GSO_TCPV6 flag set. Therefore following patch relaxes check in inet gso handler to allow such packet for segmentation. This patch also fixes wrong skb->protocol set that was done in gre_gso_segment() handler. Reported-by: Steinar H. Gunderson <sesse@google.com> CC: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/gre.c')
-rw-r--r--net/ipv4/gre.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/gre.c b/net/ipv4/gre.c
index d2d5a99fba09..cc22363965d2 100644
--- a/net/ipv4/gre.c
+++ b/net/ipv4/gre.c
@@ -121,6 +121,7 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
int ghl = GRE_HEADER_SECTION;
struct gre_base_hdr *greh;
int mac_len = skb->mac_len;
+ __be16 protocol = skb->protocol;
int tnl_hlen;
bool csum;
@@ -150,7 +151,7 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
/* setup inner skb. */
if (greh->protocol == htons(ETH_P_TEB)) {
- struct ethhdr *eth = eth_hdr(skb);
+ struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb);
skb->protocol = eth->h_proto;
} else {
skb->protocol = greh->protocol;
@@ -199,6 +200,7 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
skb_reset_mac_header(skb);
skb_set_network_header(skb, mac_len);
skb->mac_len = mac_len;
+ skb->protocol = protocol;
} while ((skb = skb->next));
out:
return segs;