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-ipv4/20250728-174736 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20250728094345.46132-4-mahe.tardy%40gmail.com patch subject: [PATCH bpf-next v3 3/4] bpf: add bpf_icmp_send_unreach cgroup_skb kfunc config: s390-randconfig-001-20250729 (https://download.01.org/0day-ci/archive/20250729/202507290356.HyFMR3K0-lkp@xxxxxxxxx/config) compiler: s390-linux-gcc (GCC) 8.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250729/202507290356.HyFMR3K0-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/202507290356.HyFMR3K0-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): s390-linux-ld: net/core/filter.o: in function `bpf_icmp_send_unreach': filter.c:(.text+0xf7b8): undefined reference to `ip_route_reply_fetch_dst' >> s390-linux-ld: filter.c:(.text+0xf7ea): undefined reference to `__icmp_send' -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
