Hi Daan, kernel test robot noticed the following build warnings: [auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Daan-De-Meyer/selftests-bpf-Add-missing-section-name-tests-for-getpeername-getsockname/20230922-032515 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20230921120913.566702-4-daan.j.demeyer%40gmail.com patch subject: [PATCH bpf-next v5 3/9] bpf: Add bpf_sock_addr_set_unix_addr() to allow writing unix sockaddr from bpf config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20230923/202309231339.L2O0CrMU-lkp@xxxxxxxxx/config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230923/202309231339.L2O0CrMU-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/202309231339.L2O0CrMU-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): net/core/filter.c:11731:17: warning: no previous declaration for 'bpf_dynptr_from_skb' [-Wmissing-declarations] __bpf_kfunc int bpf_dynptr_from_skb(struct sk_buff *skb, u64 flags, ^~~~~~~~~~~~~~~~~~~ net/core/filter.c:11744:17: warning: no previous declaration for 'bpf_dynptr_from_xdp' [-Wmissing-declarations] __bpf_kfunc int bpf_dynptr_from_xdp(struct xdp_buff *xdp, u64 flags, ^~~~~~~~~~~~~~~~~~~ >> net/core/filter.c:11757:17: warning: no previous declaration for 'bpf_sock_addr_set_unix_addr' [-Wmissing-declarations] __bpf_kfunc int bpf_sock_addr_set_unix_addr(struct bpf_sock_addr_kern *sa_kern, ^~~~~~~~~~~~~~~~~~~~~~~~~~~ net/core/filter.c:11860:17: warning: no previous declaration for 'bpf_sock_destroy' [-Wmissing-declarations] __bpf_kfunc int bpf_sock_destroy(struct sock_common *sock) ^~~~~~~~~~~~~~~~ vim +/bpf_sock_addr_set_unix_addr +11757 net/core/filter.c 11756 11757 __bpf_kfunc int bpf_sock_addr_set_unix_addr(struct bpf_sock_addr_kern *sa_kern, 11758 const u8 *addr, u32 addrlen__sz) 11759 { 11760 struct sockaddr *sa = sa_kern->uaddr; 11761 struct sockaddr_un *un; 11762 11763 if (sa_kern->sk->sk_family != AF_UNIX) 11764 return -EINVAL; 11765 11766 /* We do not allow changing the address of unnamed unix sockets. */ 11767 if (addrlen__sz == 0 || addrlen__sz > UNIX_PATH_MAX) 11768 return -EINVAL; 11769 11770 un = (struct sockaddr_un *)sa; 11771 memcpy(un->sun_path, addr, addrlen__sz); 11772 sa_kern->uaddrlen = offsetof(struct sockaddr_un, sun_path) + addrlen__sz; 11773 11774 return 0; 11775 } 11776 __diag_pop(); 11777 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
