CC: kbuild-...@lists.01.org BCC: l...@intel.com CC: linux-ker...@vger.kernel.org TO: "Steven Rostedt (Google)" <rost...@goodmis.org>
Hi Steven, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 34af78c4e616c359ed428d79fe4758a35d2c5473 commit: 9f8e5aee93ed2482638d577a56806b455084b595 tracing: Fix allocation of last_cmd in last_cmd_set() date: 4 weeks ago :::::: branch date: 17 hours ago :::::: commit date: 4 weeks ago config: i386-randconfig-s001 (https://download.01.org/0day-ci/archive/20220326/202203260407.sujojlf9-...@intel.com/config) compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9f8e5aee93ed2482638d577a56806b455084b595 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 9f8e5aee93ed2482638d577a56806b455084b595 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash fs// kernel/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> All warnings (new ones prefixed by >>): In file included from include/linux/string.h:253, from arch/x86/include/asm/page_32.h:22, from arch/x86/include/asm/page.h:14, from arch/x86/include/asm/processor.h:19, from arch/x86/include/asm/timex.h:5, from include/linux/timex.h:65, from include/linux/time32.h:13, from include/linux/time.h:60, from include/linux/stat.h:19, from include/linux/module.h:13, from kernel/trace/trace_events_hist.c:8: In function 'strncat', inlined from 'last_cmd_set' at kernel/trace/trace_events_hist.c:760:2, inlined from 'event_hist_trigger_parse' at kernel/trace/trace_events_hist.c:6191:3: >> include/linux/fortify-string.h:47:30: warning: '__builtin_strncat' output >> truncated before terminating nul copying as many bytes from a string as its >> length [-Wstringop-truncation] 47 | #define __underlying_strncat __builtin_strncat | ^ include/linux/fortify-string.h:191:10: note: in expansion of macro '__underlying_strncat' 191 | return __underlying_strncat(p, q, count); | ^~~~~~~~~~~~~~~~~~~~ kernel/trace/trace_events_hist.c: In function 'event_hist_trigger_parse': include/linux/fortify-string.h:46:29: note: length computed here 46 | #define __underlying_strlen __builtin_strlen | ^ include/linux/fortify-string.h:102:10: note: in expansion of macro '__underlying_strlen' 102 | return __underlying_strlen(p); | ^~~~~~~~~~~~~~~~~~~ vim +/__builtin_strncat +47 include/linux/fortify-string.h 3009f891bb9f32 Kees Cook 2021-08-02 26 a28a6e860c6cf2 Francis Laniel 2021-02-25 27 #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) a28a6e860c6cf2 Francis Laniel 2021-02-25 28 extern void *__underlying_memchr(const void *p, int c, __kernel_size_t size) __RENAME(memchr); a28a6e860c6cf2 Francis Laniel 2021-02-25 29 extern int __underlying_memcmp(const void *p, const void *q, __kernel_size_t size) __RENAME(memcmp); a28a6e860c6cf2 Francis Laniel 2021-02-25 30 extern void *__underlying_memcpy(void *p, const void *q, __kernel_size_t size) __RENAME(memcpy); a28a6e860c6cf2 Francis Laniel 2021-02-25 31 extern void *__underlying_memmove(void *p, const void *q, __kernel_size_t size) __RENAME(memmove); a28a6e860c6cf2 Francis Laniel 2021-02-25 32 extern void *__underlying_memset(void *p, int c, __kernel_size_t size) __RENAME(memset); a28a6e860c6cf2 Francis Laniel 2021-02-25 33 extern char *__underlying_strcat(char *p, const char *q) __RENAME(strcat); a28a6e860c6cf2 Francis Laniel 2021-02-25 34 extern char *__underlying_strcpy(char *p, const char *q) __RENAME(strcpy); a28a6e860c6cf2 Francis Laniel 2021-02-25 35 extern __kernel_size_t __underlying_strlen(const char *p) __RENAME(strlen); a28a6e860c6cf2 Francis Laniel 2021-02-25 36 extern char *__underlying_strncat(char *p, const char *q, __kernel_size_t count) __RENAME(strncat); a28a6e860c6cf2 Francis Laniel 2021-02-25 37 extern char *__underlying_strncpy(char *p, const char *q, __kernel_size_t size) __RENAME(strncpy); a28a6e860c6cf2 Francis Laniel 2021-02-25 38 #else a28a6e860c6cf2 Francis Laniel 2021-02-25 39 #define __underlying_memchr __builtin_memchr a28a6e860c6cf2 Francis Laniel 2021-02-25 40 #define __underlying_memcmp __builtin_memcmp a28a6e860c6cf2 Francis Laniel 2021-02-25 41 #define __underlying_memcpy __builtin_memcpy a28a6e860c6cf2 Francis Laniel 2021-02-25 42 #define __underlying_memmove __builtin_memmove a28a6e860c6cf2 Francis Laniel 2021-02-25 43 #define __underlying_memset __builtin_memset a28a6e860c6cf2 Francis Laniel 2021-02-25 44 #define __underlying_strcat __builtin_strcat a28a6e860c6cf2 Francis Laniel 2021-02-25 45 #define __underlying_strcpy __builtin_strcpy a28a6e860c6cf2 Francis Laniel 2021-02-25 46 #define __underlying_strlen __builtin_strlen a28a6e860c6cf2 Francis Laniel 2021-02-25 @47 #define __underlying_strncat __builtin_strncat a28a6e860c6cf2 Francis Laniel 2021-02-25 48 #define __underlying_strncpy __builtin_strncpy a28a6e860c6cf2 Francis Laniel 2021-02-25 49 #endif a28a6e860c6cf2 Francis Laniel 2021-02-25 50 :::::: The code at line 47 was first introduced by commit :::::: a28a6e860c6cf231cf3c5171c75c342adcd00406 string.h: move fortified functions definitions in a dedicated header. :::::: TO: Francis Laniel <laniel_fran...@privacyrequired.com> :::::: CC: Linus Torvalds <torva...@linux-foundation.org> -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- kbuild@lists.01.org To unsubscribe send an email to kbuild-le...@lists.01.org
