tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 2ee82481c392eec06a7ef28df61b7f0d8e45be2e commit: 01183204bc24d9612add84a809377cb10737e77f [13014/13109] Merge branch 'main' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230828/202308282000.2XNh0K6D-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230828/202308282000.2XNh0K6D-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/202308282000.2XNh0K6D-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from include/uapi/linux/neighbour.h:6, from include/linux/netdevice.h:45, from include/net/sch_generic.h:5, from include/net/pkt_cls.h:7, from drivers/net/ethernet/sfc/tc.c:12: drivers/net/ethernet/sfc/tc.c: In function 'efx_tc_mangle': >> include/linux/netlink.h:116:13: warning: 'sfc: Unsupported: only suppo...' directive output truncated writing 104 bytes into a region of size 80 [-Wformat-truncation=] 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:1223:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 1223 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: note: directive argument in the range [0, 254] 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:1223:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 1223 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: note: 'snprintf' output between 107 and 110 bytes into a destination of size 80 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:1223:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 1223 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: warning: 'sfc: Unsupported: only suppo...' directive output truncated writing 110 bytes into a region of size 80 [-Wformat-truncation=] 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:1282:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 1282 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: note: directive argument in the range [0, 254] 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:1282:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 1282 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: note: 'snprintf' output between 113 and 116 bytes into a destination of size 80 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:1282:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 1282 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ >> include/linux/netlink.h:116:13: warning: ') out of range, only support...' directive output truncated writing 60 bytes into a region of size between 46 and 55 [-Wformat-truncation=] 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:1271:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 1271 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: note: 'snprintf' output between 86 and 95 bytes into a destination of size 80 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:1271:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 1271 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c: In function 'efx_tc_flower_record_encap_match': include/linux/netlink.h:116:13: warning: ' conflicts with existing pse...' directive output truncated writing 53 bytes into a region of size between 28 and 33 [-Wformat-truncation=] 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:634:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 634 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: note: directive argument in the range [0, 65535] 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:634:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 634 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: note: 'snprintf' output between 102 and 112 bytes into a destination of size 80 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:634:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 634 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: warning: ' conflicts with existing pse...' directive output truncated writing 57 bytes into a region of size 39 [-Wformat-truncation=] 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:627:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 627 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: note: directive argument in the range [0, 255] 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:627:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 627 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:116:13: note: 'snprintf' output 103 bytes into a destination of size 80 116 | if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 117 | "%s" fmt "%s", "", ##args, "") >= \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netlink.h:131:9: note: in expansion of macro 'NL_SET_ERR_MSG_FMT' 131 | NL_SET_ERR_MSG_FMT((extack), KBUILD_MODNAME ": " fmt, ##args) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/sfc/tc.c:627:33: note: in expansion of macro 'NL_SET_ERR_MSG_FMT_MOD' 627 | NL_SET_ERR_MSG_FMT_MOD(extack, | ^~~~~~~~~~~~~~~~~~~~~~ vim +116 include/linux/netlink.h 2d4bc93368f5a0d Johannes Berg 2017-04-12 107 51c352bdbcd23d7 Edward Cree 2022-10-18 108 /* We splice fmt with %s at each end even in the snprintf so that both calls 51c352bdbcd23d7 Edward Cree 2022-10-18 109 * can use the same string constant, avoiding its duplication in .ro 51c352bdbcd23d7 Edward Cree 2022-10-18 110 */ 51c352bdbcd23d7 Edward Cree 2022-10-18 111 #define NL_SET_ERR_MSG_FMT(extack, fmt, args...) do { \ 51c352bdbcd23d7 Edward Cree 2022-10-18 112 struct netlink_ext_ack *__extack = (extack); \ 51c352bdbcd23d7 Edward Cree 2022-10-18 113 \ 51c352bdbcd23d7 Edward Cree 2022-10-18 114 if (!__extack) \ 51c352bdbcd23d7 Edward Cree 2022-10-18 115 break; \ 51c352bdbcd23d7 Edward Cree 2022-10-18 @116 if (snprintf(__extack->_msg_buf, NETLINK_MAX_FMTMSG_LEN, \ 51c352bdbcd23d7 Edward Cree 2022-10-18 117 "%s" fmt "%s", "", ##args, "") >= \ 51c352bdbcd23d7 Edward Cree 2022-10-18 118 NETLINK_MAX_FMTMSG_LEN) \ 51c352bdbcd23d7 Edward Cree 2022-10-18 119 net_warn_ratelimited("%s" fmt "%s", "truncated extack: ", \ 51c352bdbcd23d7 Edward Cree 2022-10-18 120 ##args, "\n"); \ 51c352bdbcd23d7 Edward Cree 2022-10-18 121 \ 51c352bdbcd23d7 Edward Cree 2022-10-18 122 do_trace_netlink_extack(__extack->_msg_buf); \ 51c352bdbcd23d7 Edward Cree 2022-10-18 123 \ 51c352bdbcd23d7 Edward Cree 2022-10-18 124 __extack->_msg = __extack->_msg_buf; \ 51c352bdbcd23d7 Edward Cree 2022-10-18 125 } while (0) 51c352bdbcd23d7 Edward Cree 2022-10-18 126 :::::: The code at line 116 was first introduced by commit :::::: 51c352bdbcd23d7ce46b06c1e64c82754dc44044 netlink: add support for formatted extack messages :::::: TO: Edward Cree <ecree.xilinx@xxxxxxxxx> :::::: CC: Jakub Kicinski <kuba@xxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
