[android-kernel] Failed to compile the android-goldfish-3.18 kernel after Enable "Loadable Kernel Module".

[x***@gmail.com]

git clone from: https://android.googlesource.com/kernel/goldfish.git
branch: remotes/origin/android-goldfish-3.18
Original make is succeed.

After add the following config to ./arch/arm64/configs/ranchu_defconfig

CONFIG_MODULES=y

CONFIG_MODULE_UNLOAD=y

I get a compile error:

net/built-in.o: In function `qtaguid_find_sk':

/big/src/goldfish/net/netfilter/xt_qtaguid.c:1592: undefined reference to
`xt_socket_get6_sk'

/big/src/goldfish/net/netfilter/xt_qtaguid.c:1595: undefined reference to
`xt_socket_get4_sk'

Makefile:936: recipe for target 'vmlinux' failed

make: *** [vmlinux] Error 1


cmd used:

export ARCH=arm64

export
CROSS_COMPILE=xxx/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-

make ranchu_defconfig

make


How to fix this?
Thank you