If the netfilter can't get L4 header, the netfilter
marks hotdrop value. then {ip, ip6, arp, eb}t_do_table() drops
that packet immediately. but xt_ecn doesn't mark hotdrop value.Signed-off-by: Taehee Yoo <[email protected]> --- net/netfilter/xt_ecn.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/netfilter/xt_ecn.c b/net/netfilter/xt_ecn.c index 3c831a8..c58db1d 100644 --- a/net/netfilter/xt_ecn.c +++ b/net/netfilter/xt_ecn.c @@ -37,8 +37,10 @@ static bool match_tcp(const struct sk_buff *skb, struct xt_action_param *par) * be good citizens. */ th = skb_header_pointer(skb, par->thoff, sizeof(_tcph), &_tcph); - if (th == NULL) + if (!th) { + par->hotdrop = true; return false; + } if (einfo->operation & XT_ECN_OP_MATCH_ECE) { if (einfo->invert & XT_ECN_OP_MATCH_ECE) { -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
