From 2bafeb8d2f380c3a81d98bd7b78b854b564f9cd4 Mon Sep 17 00:00:00 2001 From: Daniel Gomez Date: Fri, 19 Dec 2025 06:13:20 +0100 Subject: netfilter: replace -EEXIST with -EBUSY The -EEXIST error code is reserved by the module loading infrastructure to indicate that a module is already loaded. When a module's init function returns -EEXIST, userspace tools like kmod interpret this as "module already loaded" and treat the operation as successful, returning 0 to the user even though the module initialization actually failed. Replace -EEXIST with -EBUSY to ensure correct error reporting in the module initialization path. Affected modules: * ebtable_broute ebtable_filter ebtable_nat arptable_filter * ip6table_filter ip6table_mangle ip6table_nat ip6table_raw * ip6table_security iptable_filter iptable_mangle iptable_nat * iptable_raw iptable_security Signed-off-by: Daniel Gomez Signed-off-by: Florian Westphal --- net/bridge/netfilter/ebtables.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/bridge') diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c index 5697e3949a36..a04fc1757528 100644 --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -1299,7 +1299,7 @@ int ebt_register_template(const struct ebt_table *t, int (*table_init)(struct ne list_for_each_entry(tmpl, &template_tables, list) { if (WARN_ON_ONCE(strcmp(t->name, tmpl->name) == 0)) { mutex_unlock(&ebt_mutex); - return -EEXIST; + return -EBUSY; } } -- cgit v1.2.3