From: Florian Westphal <fw@strlen.de>
Date: Thu, 7 May 2026 09:19:22 +0000 (+0200)
Subject: netfilter: bridge: eb_tables: close module init race
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=27414ff1b287ea9a2a11675149ec28e05539f3cc;p=thirdparty%2Flinux.git

netfilter: bridge: eb_tables: close module init race

sashiko reports for unrelated patch:
 Does the core ebtables initialization in ebtables.c suffer from a similar race?
 Once nf_register_sockopt() completes, the sockopts are exposed globally.

sockopt has to be registered last, just like in ip/ip6/arptables.

Fixes: 5b53951cfc85 ("netfilter: ebtables: use net_generic infra")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 3578ffbc14ae..b9f4daac09af 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -2583,19 +2583,20 @@ static int __init ebtables_init(void)
 {
 	int ret;
 
-	ret = xt_register_target(&ebt_standard_target);
+	ret = register_pernet_subsys(&ebt_net_ops);
 	if (ret < 0)
 		return ret;
-	ret = nf_register_sockopt(&ebt_sockopts);
+
+	ret = xt_register_target(&ebt_standard_target);
 	if (ret < 0) {
-		xt_unregister_target(&ebt_standard_target);
+		unregister_pernet_subsys(&ebt_net_ops);
 		return ret;
 	}
 
-	ret = register_pernet_subsys(&ebt_net_ops);
+	ret = nf_register_sockopt(&ebt_sockopts);
 	if (ret < 0) {
-		nf_unregister_sockopt(&ebt_sockopts);
 		xt_unregister_target(&ebt_standard_target);
+		unregister_pernet_subsys(&ebt_net_ops);
 		return ret;
 	}