| Message ID | 1387184529-6911-1-git-send-email-timo.teras@iki.fi |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
From: Timo Teräs <timo.teras@iki.fi> Date: Mon, 16 Dec 2013 11:02:09 +0200 > ipgre_header_parse() needs to parse the tunnel's ip header and it > uses mac_header to locate the iphdr. This got broken when gre tunneling > was refactored as mac_header is no longer updated to point to iphdr. > Introduce skb_pop_mac_header() helper to do the mac_header assignment > and use it in ipgre_rcv() to fix msg_name parsing. > > Bug introduced in commit c54419321455 (GRE: Refactor GRE tunneling code.) > > Cc: Pravin B Shelar <pshelar@nicira.com> > Signed-off-by: Timo Teräs <timo.teras@iki.fi> > --- > Updated as suggested. Please queue for -stable too. Applied and queued up for -stable, thanks! -- 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/include/linux/skbuff.h b/include/linux/skbuff.h index 77c7aae..8b38a2f 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1638,6 +1638,11 @@ static inline void skb_set_mac_header(struct sk_buff *skb, const int offset) skb->mac_header += 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/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index d7aea4c..e560ef3 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -217,6 +217,7 @@ static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi) iph->saddr, iph->daddr, tpi->key); if (tunnel) { + skb_pop_mac_header(skb); ip_tunnel_rcv(tunnel, skb, tpi, log_ecn_error); return PACKET_RCVD; }
ipgre_header_parse() needs to parse the tunnel's ip header and it uses mac_header to locate the iphdr. This got broken when gre tunneling was refactored as mac_header is no longer updated to point to iphdr. Introduce skb_pop_mac_header() helper to do the mac_header assignment and use it in ipgre_rcv() to fix msg_name parsing. Bug introduced in commit c54419321455 (GRE: Refactor GRE tunneling code.) Cc: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Timo Teräs <timo.teras@iki.fi> --- Updated as suggested. Please queue for -stable too. include/linux/skbuff.h | 5 +++++ net/ipv4/ip_gre.c | 1 + 2 files changed, 6 insertions(+)