Hi "Linus, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Linus-L-ssing/bridge-Implement-M... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git bfdd5aaa54b0a44d9df550fe4c9db7e1470a11b8 config: arm64-allyesconfig (attached as .config) compiler: aarch64-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): net/bridge/br_multicast.c: In function 'br_multicast_wakeupcall_check': 1968 | if (ipv6_mc_check_icmpv6 < 0) | ^ # https://github.com/0day-ci/linux/commit/fdde3c8b901df4c7d62fcd4cdd9a66114... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Linus-L-ssing/bridge-Implement-MLD-Querier-wake-up-calls-Android-bug-workaround/20200817-043402 git checkout fdde3c8b901df4c7d62fcd4cdd9a66114758889a vim +1968 net/bridge/br_multicast.c 1930 1931 static bool br_multicast_wakeupcall_check(struct net_bridge *br, 1932 struct net_bridge_port *port, 1933 struct sk_buff *skb, u16 vid) 1934 { 1935 struct ethhdr *eth = eth_hdr(skb); 1936 const struct ipv6hdr *ip6h; 1937 unsigned int offset, len; 1938 struct icmp6hdr *icmp6h; 1939 1940 /* Wake-up calls to VLANs unsupported for now */ 1941 if (!port->wakeupcall_num_rings || vid || 1942 eth->h_proto != htons(ETH_P_IPV6)) 1943 return false; 1944 1945 if (!ether_addr_equal(eth->h_dest, br->dev->dev_addr) || 1946 is_multicast_ether_addr(eth->h_source) || 1947 is_zero_ether_addr(eth->h_source)) 1948 return false; 1949 1950 offset = skb_network_offset(skb) + sizeof(*ip6h); 1951 if (!pskb_may_pull(skb, offset)) 1952 return false; 1953 1954 ip6h = ipv6_hdr(skb); 1955 1956 if (ip6h->version != 6) 1957 return false; 1958 1959 len = offset + ntohs(ip6h->payload_len); 1960 if (skb->len < len || len <= offset) 1961 return false; 1962 1963 if (ip6h->nexthdr != IPPROTO_ICMPV6) 1964 return false; 1965 1966 skb_set_transport_header(skb, offset); 1967 1969 return false; 1970 1971 icmp6h = (struct icmp6hdr *)skb_transport_header(skb); 1972 if (icmp6h->icmp6_type != ICMPV6_ECHO_REPLY || 1973 icmp6h->icmp6_dataun.u_echo.identifier != BR_MC_WAKEUP_ID) 1974 return false; 1975 1976 return true; 1977 } 1978 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org