netfilter: xtables: slightly better error reporting
When extended status codes are available, such as ENOMEM on failed
allocations, or subsequent functions (e.g. nf_ct_get_l3proto), passing
them up to userspace seems like a good idea compared to just always
EINVAL.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/net/netfilter/xt_state.c b/net/netfilter/xt_state.c
index 8e8c9df..2b75230 100644
--- a/net/netfilter/xt_state.c
+++ b/net/netfilter/xt_state.c
@@ -39,10 +39,13 @@
static int state_mt_check(const struct xt_mtchk_param *par)
{
- if (nf_ct_l3proto_try_module_get(par->family) < 0) {
+ int ret;
+
+ ret = nf_ct_l3proto_try_module_get(par->family);
+ if (ret < 0) {
pr_info("cannot load conntrack support for proto=%u\n",
par->family);
- return -EINVAL;
+ return ret;
}
return 0;
}
