From: Arnd Bergmann <arnd@arndb.de>

CONFIG_IP_NF_NAT accidentally selects the wrong NF_IPTABLES_LEGACY
symbol, which ends up causing a link failure in some configurations:

WARNING: unmet direct dependencies detected for IP6_NF_IPTABLES_LEGACY
  Depends on [n]: NET [=y] && INET [=y] && IPV6 [=n] && NETFILTER [=y]
  Selected by [m]:

Select IP_NF_IPTABLES_LEGACY instead of IP6_NF_IPTABLES_LEGACY.

Fixes: a9525c7f6219 ("netfilter: xtables: allow xtables-nft only builds")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 net/ipv4/netfilter/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 87d890172809..8f6e950163a7 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -217,7 +217,7 @@ config IP_NF_NAT
 	default m if NETFILTER_ADVANCED=n
 	select NF_NAT
 	select NETFILTER_XT_NAT
-	select IP6_NF_IPTABLES_LEGACY
+	select IP_NF_IPTABLES_LEGACY
 	help
 	  This enables the `nat' table in iptables. This allows masquerading,
 	  port forwarding and other forms of full Network Address Port
-- 
2.39.2

Arnd Bergmann <arnd@kernel.org> wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> CONFIG_IP_NF_NAT accidentally selects the wrong NF_IPTABLES_LEGACY
> symbol, which ends up causing a link failure in some configurations:
> 
> WARNING: unmet direct dependencies detected for IP6_NF_IPTABLES_LEGACY
>   Depends on [n]: NET [=y] && INET [=y] && IPV6 [=n] && NETFILTER [=y]
>   Selected by [m]:
> 
> Select IP_NF_IPTABLES_LEGACY instead of IP6_NF_IPTABLES_LEGACY.

Patch is correct but this is already fixed via
749d4ef0868c ("netfilter: xtables: fix up kconfig dependencies")