Hi Mahe, kernel test robot noticed the following build errors: [auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Mahe-Tardy/net-move-netfilter-nf_reject_fill_skb_dst-to-core-ipv4/20250710-182905 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20250710102607.12413-3-mahe.tardy%40gmail.com patch subject: [PATCH bpf-next v1 2/4] net: move netfilter nf_reject6_fill_skb_dst to core ipv6 config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20250711/202507110529.9ZuNSyQU-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250711/202507110529.9ZuNSyQU-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202507110529.9ZuNSyQU-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): net/ipv6/netfilter/nf_reject_ipv6.c: In function 'nf_send_unreach6': >> net/ipv6/netfilter/nf_reject_ipv6.c:386:13: error: implicit declaration of function 'ip6_reply_fill_dst' [-Werror=implicit-function-declaration] 386 | ip6_reply_fill_dst(skb_in) < 0) | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/ip6_reply_fill_dst +386 net/ipv6/netfilter/nf_reject_ipv6.c 375 376 void nf_send_unreach6(struct net *net, struct sk_buff *skb_in, 377 unsigned char code, unsigned int hooknum) 378 { 379 if (!reject6_csum_ok(skb_in, hooknum)) 380 return; 381 382 if (hooknum == NF_INET_LOCAL_OUT && skb_in->dev == NULL) 383 skb_in->dev = net->loopback_dev; 384 385 if ((hooknum == NF_INET_PRE_ROUTING || hooknum == NF_INET_INGRESS) && > 386 ip6_reply_fill_dst(skb_in) < 0) 387 return; 388 389 icmpv6_send(skb_in, ICMPV6_DEST_UNREACH, code, 0); 390 } 391 EXPORT_SYMBOL_GPL(nf_send_unreach6); 392 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
