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| author | Lorenzo Bianconi <lorenzo.bianconi@redhat.com> | 2019-01-18 14:05:39 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-01-22 22:52:17 +0300 |
| commit | cb73ee40b1b381eaf3749e6dbeed567bb38e5258 (patch) | |
| tree | 4a46c80cac3f7bb0f044f1cbf2d73a66129a9456 /net/ipv4/ip_gre.c | |
| parent | 56cb4e5034998b5522a657957321ca64ca2ea0a0 (diff) | |
| download | linux-cb73ee40b1b381eaf3749e6dbeed567bb38e5258.tar.xz | |
net: ip_gre: use erspan key field for tunnel lookup
Use ERSPAN key header field as tunnel key in gre_parse_header routine
since ERSPAN protocol sets the key field of the external GRE header to
0 resulting in a tunnel lookup fail in ip6gre_err.
In addition remove key field parsing and pskb_may_pull check in
erspan_rcv and ip6erspan_rcv
Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_gre.c')
| -rw-r--r-- | net/ipv4/ip_gre.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index b1a74d80d868..20a64fe6254b 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -268,20 +268,11 @@ static int erspan_rcv(struct sk_buff *skb, struct tnl_ptk_info *tpi, int len; itn = net_generic(net, erspan_net_id); - len = gre_hdr_len + sizeof(*ershdr); - - /* Check based hdr len */ - if (unlikely(!pskb_may_pull(skb, len))) - return PACKET_REJECT; iph = ip_hdr(skb); ershdr = (struct erspan_base_hdr *)(skb->data + gre_hdr_len); ver = ershdr->ver; - /* The original GRE header does not have key field, - * Use ERSPAN 10-bit session ID as key. - */ - tpi->key = cpu_to_be32(get_session_id(ershdr)); tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, tpi->flags | TUNNEL_KEY, iph->saddr, iph->daddr, tpi->key); |