[PATCH 4.18 094/168] netfilter: kconfig: nat related expression depend on nftables core

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Florian Westphal <fw@xxxxxxxxx>

[ Upstream commit e0758412208960be9de11e6d2350c81ffd88410f ]

NF_TABLES_IPV4 is now boolean so it is possible to set

NF_TABLES=m
NF_TABLES_IPV4=y
NFT_CHAIN_NAT_IPV4=y

which causes:
nft_chain_nat_ipv4.c:(.text+0x6d): undefined reference to `nft_do_chain'

Wrap NFT_CHAIN_NAT_IPV4 and related nat expressions with NF_TABLES to
restore the dependency.

Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Fixes: 02c7b25e5f54 ("netfilter: nf_tables: build-in filter chain type")
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
Acked-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/ipv4/netfilter/Kconfig |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -122,6 +122,10 @@ config NF_NAT_IPV4
 
 if NF_NAT_IPV4
 
+config NF_NAT_MASQUERADE_IPV4
+	bool
+
+if NF_TABLES
 config NFT_CHAIN_NAT_IPV4
 	depends on NF_TABLES_IPV4
 	tristate "IPv4 nf_tables nat chain support"
@@ -131,9 +135,6 @@ config NFT_CHAIN_NAT_IPV4
 	  packet transformations such as the source, destination address and
 	  source and destination ports.
 
-config NF_NAT_MASQUERADE_IPV4
-	bool
-
 config NFT_MASQ_IPV4
 	tristate "IPv4 masquerading support for nf_tables"
 	depends on NF_TABLES_IPV4
@@ -151,6 +152,7 @@ config NFT_REDIR_IPV4
 	help
 	  This is the expression that provides IPv4 redirect support for
 	  nf_tables.
+endif # NF_TABLES
 
 config NF_NAT_SNMP_BASIC
 	tristate "Basic SNMP-ALG support"