tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   92edc4aef86780a8ad01b092c6d6630bb3cb423d
commit: fa538f7cf05aab61cd91e01c160d4a09c81b8ffe [2072/5794] netfilter: nf_reject: add reject skbuff creation helpers
config: i386-randconfig-a005-20201116 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=fa538f7cf05aab61cd91e01c160d4a09c81b8ffe
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout fa538f7cf05aab61cd91e01c160d4a09c81b8ffe
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "nf_reject_skb_v4_tcp_reset" [net/bridge/netfilter/nft_reject_bridge.ko] undefined!
>> ERROR: modpost: "nf_reject_skb_v4_unreach" [net/bridge/netfilter/nft_reject_bridge.ko] undefined!

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org