Hi WingMan, FYI, the error/warning still remains. tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-linux-5.10.y head: 4c2eade9f722838b0e457650368cba1c6c7483c2 commit: e355bf097bb11257afeadf6665e51f224eeb93a7 [6282/6417] net: packet: Pass on redundant net info in packet_recvmsg config: parisc-randconfig-c003-20210720 (attached as .config) compiler: hppa-linux-gcc (GCC) 10.3.0 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 git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git git fetch --no-tags ti ti-linux-5.10.y git checkout e355bf097bb11257afeadf6665e51f224eeb93a7 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=parisc SHELL=/bin/bash 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 drivers/net/loopback.c:47: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in -- In file included from kernel/audit.c:53: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in kernel/audit.c: In function 'audit_log_vformat': kernel/audit.c:1923:2: warning: function 'audit_log_vformat' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 1923 | len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args); | ^~~ kernel/audit.c:1932:3: warning: function 'audit_log_vformat' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 1932 | len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args2); | ^~~ -- In file included from fs/io_uring.c:64: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in fs/io_uring.c: In function 'io_prep_async_work': fs/io_uring.c:1431:22: warning: variable 'id' set but not used [-Wunused-but-set-variable] 1431 | struct io_identity *id; | ^~ -- In file included from security/tomoyo/common.h:35, from security/tomoyo/audit.c:8: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in security/tomoyo/audit.c: In function 'tomoyo_init_log': security/tomoyo/audit.c:290:2: warning: function 'tomoyo_init_log' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 290 | vsnprintf(buf + pos, len - pos, fmt, args); | ^~~~~~~~~ -- In file included from security/tomoyo/common.h:35, from security/tomoyo/common.c:11: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in security/tomoyo/common.c: In function 'tomoyo_addprintf': security/tomoyo/common.c:202:2: warning: function 'tomoyo_addprintf' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 202 | vsnprintf(buffer + pos, len - pos - 1, fmt, args); | ^~~~~~~~~ -- In file included from include/linux/tcp.h:19, from include/linux/ipv6.h:87, from include/net/ipv6.h:12, from include/rdma/ib_verbs.h:24, from include/linux/lsm_audit.h:25, from security/apparmor/include/audit.h:16, from security/apparmor/policy_unpack.c:22: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in In file included from security/apparmor/policy_unpack.c:1237: security/apparmor/policy_unpack_test.c: At top level: security/apparmor/policy_unpack_test.c:51:16: warning: no previous prototype for 'build_aa_ext_struct' [-Wmissing-prototypes] 51 | struct aa_ext *build_aa_ext_struct(struct policy_unpack_fixture *puf, | ^~~~~~~~~~~~~~~~~~~ -- In file included from include/net/cls_cgroup.h:14, from net/socket.c:95: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in net/socket.c: In function '__sys_getsockopt': net/socket.c:2155:6: warning: variable 'max_optlen' set but not used [-Wunused-but-set-variable] 2155 | int max_optlen; | ^~~~~~~~~~ -- In file included from include/trace/events/sock.h:8, from net/core/net-traces.c:33: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in In file included from include/trace/define_trace.h:102, from include/trace/events/neigh.h:255, from net/core/net-traces.c:50: include/trace/events/neigh.h: In function 'trace_event_raw_event_neigh_create': include/trace/events/neigh.h:42:20: warning: variable 'pin6' set but not used [-Wunused-but-set-variable] 42 | struct in6_addr *pin6; | ^~~~ include/trace/trace_events.h:695:4: note: in definition of macro 'DECLARE_EVENT_CLASS' 695 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:79:9: note: in expansion of macro 'PARAMS' 79 | PARAMS(assign), \ | ^~~~~~ include/trace/events/neigh.h:23:1: note: in expansion of macro 'TRACE_EVENT' 23 | TRACE_EVENT(neigh_create, | ^~~~~~~~~~~ include/trace/events/neigh.h:41:2: note: in expansion of macro 'TP_fast_assign' 41 | TP_fast_assign( | ^~~~~~~~~~~~~~ -- In file included from net/nfc/nci/../nfc.h:14, from net/nfc/nci/hci.c:13: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in net/nfc/nci/hci.c: In function 'nci_hci_resp_received': net/nfc/nci/hci.c:369:5: warning: variable 'status' set but not used [-Wunused-but-set-variable] 369 | u8 status = result; | ^~~~~~ -- In file included from include/linux/tcp.h:19, from include/linux/ipv6.h:87, from include/net/addrconf.h:50, from lib/vsprintf.c:40: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in lib/vsprintf.c: In function 'va_format': lib/vsprintf.c:1663:2: warning: function 'va_format' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 1663 | buf += vsnprintf(buf, end > buf ? end - buf : 0, va_fmt->fmt, va); | ^~~ -- In file included from net/bridge/br_netlink_tunnel.c:14: include/net/sock.h: In function 'sock_recv_redundant_info': 2523 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2523:29: note: each undeclared identifier is reported only once for each function it appears in net/bridge/br_netlink_tunnel.c: At top level: net/bridge/br_netlink_tunnel.c:29:6: warning: no previous prototype for 'vlan_tunid_inrange' [-Wmissing-prototypes] 29 | bool vlan_tunid_inrange(const struct net_bridge_vlan *v_curr, | ^~~~~~~~~~~~~~~~~~ net/bridge/br_netlink_tunnel.c:196:5: warning: no previous prototype for 'br_vlan_tunnel_info' [-Wmissing-prototypes] 196 | int br_vlan_tunnel_info(const struct net_bridge_port *p, int cmd, | ^~~~~~~~~~~~~~~~~~~ vim +/SCM_REDUNDANT +2523 include/net/sock.h 2514 2515 DECLARE_STATIC_KEY_FALSE(tcp_rx_skb_cache_key); 2516 static inline void sock_recv_redundant_info(struct msghdr *msg, struct sock *sk, 2517 struct sk_buff *skb) 2518 { 2519 struct skb_redundant_info *sred; 2520 2521 sred = skb_redinfo(skb); 2522 if (sred->lsdu_size) 2524 } 2525 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org