netfilter: SYNPROXY target: restrict to INPUT/FORWARD
authorPatrick McHardy <kaber@trash.net>
Sun, 8 Dec 2013 16:52:31 +0000 (16:52 +0000)
committerPablo Neira Ayuso <pablo@netfilter.org>
Wed, 11 Dec 2013 10:30:25 +0000 (11:30 +0100)
Fix a crash in synproxy_send_tcp() when using the SYNPROXY target in the
PREROUTING chain caused by missing routing information.

Reported-by: Nicki P. <xastx@gmx.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
net/ipv4/netfilter/ipt_SYNPROXY.c
net/ipv6/netfilter/ip6t_SYNPROXY.c

index f13bd91d9a56774f58dcf14de892b2bedd855cc5..a313c3fbeb469e0594b2f7bccd788d687184bc61 100644 (file)
@@ -423,6 +423,7 @@ static void synproxy_tg4_destroy(const struct xt_tgdtor_param *par)
 static struct xt_target synproxy_tg4_reg __read_mostly = {
        .name           = "SYNPROXY",
        .family         = NFPROTO_IPV4,
+       .hooks          = (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_FORWARD),
        .target         = synproxy_tg4,
        .targetsize     = sizeof(struct xt_synproxy_info),
        .checkentry     = synproxy_tg4_check,
index f78f41aca8e90967a026a145f938746ce317cf10..a0d17270117c37793be3cb61c4d767cd57f70611 100644 (file)
@@ -446,6 +446,7 @@ static void synproxy_tg6_destroy(const struct xt_tgdtor_param *par)
 static struct xt_target synproxy_tg6_reg __read_mostly = {
        .name           = "SYNPROXY",
        .family         = NFPROTO_IPV6,
+       .hooks          = (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_FORWARD),
        .target         = synproxy_tg6,
        .targetsize     = sizeof(struct xt_synproxy_info),
        .checkentry     = synproxy_tg6_check,