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-ipv4/20250726-030109 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20250725185342.262067-4-mahe.tardy%40gmail.com patch subject: [PATCH bpf-next v2 3/4] bpf: add bpf_icmp_send_unreach cgroup_skb kfunc config: arm64-defconfig (https://download.01.org/0day-ci/archive/20250727/202507270940.kXGmRbg5-lkp@xxxxxxxxx/config) compiler: aarch64-linux-gcc (GCC) 15.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250727/202507270940.kXGmRbg5-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/202507270940.kXGmRbg5-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): aarch64-linux-ld: Unexpected GOT/PLT entries detected! aarch64-linux-ld: Unexpected run-time procedure linkages detected! aarch64-linux-ld: net/core/filter.o: in function `bpf_icmp_send_unreach': >> net/core/filter.c:12184:(.text+0x14574): undefined reference to `ip6_route_reply_fetch_dst' vim +12184 net/core/filter.c 12152 12153 __bpf_kfunc int bpf_icmp_send_unreach(struct __sk_buff *__skb, int code) 12154 { 12155 struct sk_buff *skb = (struct sk_buff *)__skb; 12156 struct sk_buff *nskb; 12157 12158 switch (skb->protocol) { 12159 case htons(ETH_P_IP): 12160 if (code < 0 || code > NR_ICMP_UNREACH) 12161 return -EINVAL; 12162 12163 nskb = skb_clone(skb, GFP_ATOMIC); 12164 if (!nskb) 12165 return -ENOMEM; 12166 12167 if (ip_route_reply_fetch_dst(nskb) < 0) { 12168 kfree_skb(nskb); 12169 return -EHOSTUNREACH; 12170 } 12171 12172 icmp_send(nskb, ICMP_DEST_UNREACH, code, 0); 12173 kfree_skb(nskb); 12174 break; 12175 #if IS_ENABLED(CONFIG_IPV6) 12176 case htons(ETH_P_IPV6): 12177 if (code < 0 || code > ICMPV6_REJECT_ROUTE) 12178 return -EINVAL; 12179 12180 nskb = skb_clone(skb, GFP_ATOMIC); 12181 if (!nskb) 12182 return -ENOMEM; 12183 12184 if (ip6_route_reply_fetch_dst(nskb) < 0) { 12185 kfree_skb(nskb); 12186 return -EHOSTUNREACH; 12187 } 12188 12189 icmpv6_send(nskb, ICMPV6_DEST_UNREACH, code, 0); 12190 kfree_skb(nskb); 12191 break; 12192 #endif 12193 default: 12194 return -EPROTONOSUPPORT; 12195 } 12196 12197 return SK_DROP; 12198 } 12199 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
