Message ID | 1413624364-12944-1-git-send-email-roy.qing.li@gmail.com |
---|---|
State | Accepted, archived |
Delegated to: | David Miller |
Headers | show |
On Sat, 2014-10-18 at 17:26 +0800, roy.qing.li@gmail.com wrote: > From: Li RongQing <roy.qing.li@gmail.com> > > pskb_may_pull() may change skb->data and make greh pointer oboslete; > so need to reassign greh; > but since first calling pskb_may_pull already ensured that skb->data > has enough space for greh, so move the reference of greh before second > calling pskb_may_pull(), to avoid reassign greh. > > Fixes: 7a7ffbabf9("ipv4: fix tunneled VM traffic over hw VXLAN/GRE GSO NIC") > Cc: Wei-Chun Chao <weichunc@plumgrid.com> > Signed-off-by: Li RongQing <roy.qing.li@gmail.com> > --- Acked-by: Eric Dumazet <edumazet@google.com> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
From: roy.qing.li@gmail.com Date: Sat, 18 Oct 2014 17:26:04 +0800 > From: Li RongQing <roy.qing.li@gmail.com> > > pskb_may_pull() may change skb->data and make greh pointer oboslete; > so need to reassign greh; > but since first calling pskb_may_pull already ensured that skb->data > has enough space for greh, so move the reference of greh before second > calling pskb_may_pull(), to avoid reassign greh. > > Fixes: 7a7ffbabf9("ipv4: fix tunneled VM traffic over hw VXLAN/GRE GSO NIC") > Cc: Wei-Chun Chao <weichunc@plumgrid.com> > Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Applied. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c index a777295..ccda096 100644 --- a/net/ipv4/gre_offload.c +++ b/net/ipv4/gre_offload.c @@ -55,13 +55,13 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb, if (csum) skb->encap_hdr_csum = 1; - if (unlikely(!pskb_may_pull(skb, ghl))) - goto out; - /* setup inner skb. */ skb->protocol = greh->protocol; skb->encapsulation = 0; + if (unlikely(!pskb_may_pull(skb, ghl))) + goto out; + __skb_pull(skb, ghl); skb_reset_mac_header(skb); skb_set_network_header(skb, skb_inner_network_offset(skb));