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net: erspan: fix erspan config overwrite

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When an erspan tunnel device receives an erpsan packet with different
tunnel metadata (ex: version, index, hwid, direction), existing code
overwrites the tunnel device's erspan configuration with the received
packet's metadata.  The patch fixes it.

Fixes: 1a66a836da ("gre: add collect_md mode to ERSPAN tunnel")
Fixes: f551c91de2 ("net: erspan: introduce erspan v2 for ip_gre")
Fixes: ef7baf5e08 ("ip6_gre: add ip6 erspan collect_md mode")
Fixes: 94d7d8f292 ("ip6_gre: add erspan v2 support")
Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
William Tu 2018-02-05 13:35:35 -08:00 committed by David S. Miller
parent 3df1928302
commit 39f57f6799
2 changed files with 0 additions and 18 deletions
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9
net/ipv4/ip_gre.c
View File

@ -322,15 +322,6 @@ static int erspan_rcv(struct sk_buff *skb, struct tnl_ptk_info *tpi,
info = &tun_dst->u.tun_info;
info->key.tun_flags |= TUNNEL_ERSPAN_OPT;
info->options_len = sizeof(*md);
} else {
tunnel->erspan_ver = ver;
if (ver == 1) {
tunnel->index = ntohl(pkt_md->u.index);
} else {
tunnel->dir = pkt_md->u.md2.dir;
tunnel->hwid = get_hwid(&pkt_md->u.md2);
}
}
skb_reset_mac_header(skb);

9
net/ipv6/ip6_gre.c
View File

@ -562,15 +562,6 @@ static int ip6erspan_rcv(struct sk_buff *skb, int gre_hdr_len,
ip6_tnl_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);
} else {
tunnel->parms.erspan_ver = ver;
if (ver == 1) {
tunnel->parms.index = ntohl(pkt_md->u.index);
} else {
tunnel->parms.dir = pkt_md->u.md2.dir;
tunnel->parms.hwid = get_hwid(&pkt_md->u.md2);
}
ip6_tnl_rcv(tunnel, skb, tpi, NULL, log_ecn_error);
}