netfilter: xt_conntrack: warn about use in raw table

nfct happens to run after the raw table only.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/netfilter/xt_conntrack.c b/net/netfilter/xt_conntrack.c
index 4ef1b63ad73f..2c0086a4751e 100644
--- a/net/netfilter/xt_conntrack.c
+++ b/net/netfilter/xt_conntrack.c
@@ -272,6 +272,11 @@ static int conntrack_mt_check(const struct xt_mtchk_param *par)
 {
         int ret;
 
+        if (strcmp(par->table, "raw") == 0) {
+                pr_info("state is undetermined at the time of raw table\n");
+                return -EINVAL;
+        }
+
         ret = nf_ct_l3proto_try_module_get(par->family);
         if (ret < 0)
                 pr_info("cannot load conntrack support for proto=%u\n",