diff options
| author | David S. Miller <davem@davemloft.net> | 2019-04-08 23:39:36 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-08 23:39:36 -0700 |
| commit | 310655b07ae8ef0b8fdb641b610ded2052215664 (patch) | |
| tree | d9b7a500ef21a087a337e1f1bb9218000cf1c03d /net/ipv6 | |
| parent | 7f301cff1fc20c5b91203c5e610cf95782081d5d (diff) | |
| parent | 869e3305f23dfeacdaa234717c92ccb237815d90 (diff) | |
| download | linux-310655b07ae8ef0b8fdb641b610ded2052215664.tar.bz2 | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/ip6_gre.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index b32c95f02128..655e46b227f9 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -525,10 +525,10 @@ static int ip6gre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi) } static int ip6erspan_rcv(struct sk_buff *skb, - struct tnl_ptk_info *tpi) + struct tnl_ptk_info *tpi, + int gre_hdr_len) { struct erspan_base_hdr *ershdr; - struct erspan_metadata *pkt_md; const struct ipv6hdr *ipv6h; struct erspan_md2 *md2; struct ip6_tnl *tunnel; @@ -547,18 +547,16 @@ static int ip6erspan_rcv(struct sk_buff *skb, if (unlikely(!pskb_may_pull(skb, len))) return PACKET_REJECT; - ershdr = (struct erspan_base_hdr *)skb->data; - pkt_md = (struct erspan_metadata *)(ershdr + 1); - if (__iptunnel_pull_header(skb, len, htons(ETH_P_TEB), false, false) < 0) return PACKET_REJECT; if (tunnel->parms.collect_md) { + struct erspan_metadata *pkt_md, *md; struct metadata_dst *tun_dst; struct ip_tunnel_info *info; - struct erspan_metadata *md; + unsigned char *gh; __be64 tun_id; __be16 flags; @@ -571,6 +569,14 @@ static int ip6erspan_rcv(struct sk_buff *skb, if (!tun_dst) return PACKET_REJECT; + /* skb can be uncloned in __iptunnel_pull_header, so + * old pkt_md is no longer valid and we need to reset + * it + */ + gh = skb_network_header(skb) + + skb_network_header_len(skb); + pkt_md = (struct erspan_metadata *)(gh + gre_hdr_len + + sizeof(*ershdr)); info = &tun_dst->u.tun_info; md = ip_tunnel_info_opts(info); md->version = ver; @@ -607,7 +613,7 @@ static int gre_rcv(struct sk_buff *skb) if (unlikely(tpi.proto == htons(ETH_P_ERSPAN) || tpi.proto == htons(ETH_P_ERSPAN2))) { - if (ip6erspan_rcv(skb, &tpi) == PACKET_RCVD) + if (ip6erspan_rcv(skb, &tpi, hdr_len) == PACKET_RCVD) return 0; goto out; } |