diff options
| -rw-r--r-- | net/ipv4/ip_tunnel_core.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index 0a7eaadc9a8d..47f8b947eef1 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -321,6 +321,7 @@ static int ip_tun_parse_opts_erspan(struct nlattr *attr, { struct nlattr *tb[LWTUNNEL_IP_OPT_ERSPAN_MAX + 1]; int err; + u8 ver; err = nla_parse_nested(tb, LWTUNNEL_IP_OPT_ERSPAN_MAX, attr, erspan_opt_policy, extack); @@ -330,24 +331,31 @@ static int ip_tun_parse_opts_erspan(struct nlattr *attr, if (!tb[LWTUNNEL_IP_OPT_ERSPAN_VER]) return -EINVAL; + ver = nla_get_u8(tb[LWTUNNEL_IP_OPT_ERSPAN_VER]); + if (ver == 1) { + if (!tb[LWTUNNEL_IP_OPT_ERSPAN_INDEX]) + return -EINVAL; + } else if (ver == 2) { + if (!tb[LWTUNNEL_IP_OPT_ERSPAN_DIR] || + !tb[LWTUNNEL_IP_OPT_ERSPAN_HWID]) + return -EINVAL; + } else { + return -EINVAL; + } + if (info) { struct erspan_metadata *md = ip_tunnel_info_opts(info) + opts_len; - attr = tb[LWTUNNEL_IP_OPT_ERSPAN_VER]; - md->version = nla_get_u8(attr); - - if (md->version == 1 && tb[LWTUNNEL_IP_OPT_ERSPAN_INDEX]) { + md->version = ver; + if (ver == 1) { attr = tb[LWTUNNEL_IP_OPT_ERSPAN_INDEX]; md->u.index = nla_get_be32(attr); - } else if (md->version == 2 && tb[LWTUNNEL_IP_OPT_ERSPAN_DIR] && - tb[LWTUNNEL_IP_OPT_ERSPAN_HWID]) { + } else { attr = tb[LWTUNNEL_IP_OPT_ERSPAN_DIR]; md->u.md2.dir = nla_get_u8(attr); attr = tb[LWTUNNEL_IP_OPT_ERSPAN_HWID]; set_hwid(&md->u.md2, nla_get_u8(attr)); - } else { - return -EINVAL; } info->key.tun_flags |= TUNNEL_ERSPAN_OPT; |