Hi "Toke, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Toke-H-iland-J-rgensen/bpf-Rewor... base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: h8300-randconfig-r001-20201014 (attached as .config) compiler: h8300-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/49323d0d5b278524de4bd9450ce2962a4... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Toke-H-iland-J-rgensen/bpf-Rework-bpf_redirect_neigh-to-allow-supplying-nexthop-from-caller/20201015-234710 git checkout 49323d0d5b278524de4bd9450ce2962a44311fec # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/module.h:12, from net/core/filter.c:20: include/linux/scatterlist.h: In function 'sg_set_buf': include/asm-generic/page.h:93:50: warning: ordered comparison of pointer with null pointer [-Wextra] 93 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ | ^~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/scatterlist.h:143:2: note: in expansion of macro 'BUG_ON' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~ include/linux/scatterlist.h:143:10: note: in expansion of macro 'virt_addr_valid' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~~~~~~~~~~ net/core/filter.c: In function '__bpf_redirect_neigh': 2404 | return __bpf_redirect_neigh_v6(skb, dev, nh); | ^~~~~~~~~~~~~~~~~~~~~~~ net/core/filter.c:2267:12: note: declared here 2267 | static int __bpf_redirect_neigh_v6(struct sk_buff *skb, struct net_device *dev) | ^~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/h8300/include/asm/atomic.h:7, from include/linux/atomic.h:7, from include/asm-generic/bitops/lock.h:5, from arch/h8300/include/asm/bitops.h:170, from include/linux/bitops.h:29, from include/linux/kernel.h:12, from include/linux/list.h:9, from include/linux/module.h:12, from net/core/filter.c:20: net/core/filter.c: In function 'bpf_clear_redirect_map': arch/h8300/include/asm/cmpxchg.h:54:3: warning: value computed is not used [-Wunused-value] 54 | ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \ | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 55 | (unsigned long)(o), \ | ~~~~~~~~~~~~~~~~~~~~~ 56 | (unsigned long)(n), \ | ~~~~~~~~~~~~~~~~~~~~~ 57 | sizeof(*(ptr)))) | ~~~~~~~~~~~~~~~~ include/asm-generic/cmpxchg.h:106:28: note: in expansion of macro 'cmpxchg_local' 106 | #define cmpxchg(ptr, o, n) cmpxchg_local((ptr), (o), (n)) | ^~~~~~~~~~~~~ net/core/filter.c:3978:4: note: in expansion of macro 'cmpxchg' 3978 | cmpxchg(&ri->map, map, NULL); | ^~~~~~~ vim +/__bpf_redirect_neigh_v6 +2404 net/core/filter.c 2385 2386 static int __bpf_redirect_neigh(struct sk_buff *skb, struct net_device *dev, 2387 struct bpf_nh_params *nh) 2388 { 2389 struct ethhdr *ethh = eth_hdr(skb); 2390 2391 if (unlikely(skb->mac_header >= skb->network_header)) 2392 goto out; 2393 bpf_push_mac_rcsum(skb); 2394 if (is_multicast_ether_addr(ethh->h_dest)) 2395 goto out; 2396 2397 skb_pull(skb, sizeof(*ethh)); 2398 skb_unset_mac_header(skb); 2399 skb_reset_network_header(skb); 2400 2401 if (skb->protocol == htons(ETH_P_IP)) 2402 return __bpf_redirect_neigh_v4(skb, dev, nh); 2403 else if (skb->protocol == htons(ETH_P_IPV6)) 2405 out: 2406 kfree_skb(skb); 2407 return -ENOTSUPP; 2408 } 2409 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org