Messages in this thread | | | Date | Fri, 28 Jan 2022 10:16:06 +0800 | From | kernel test robot <> | Subject | [zanussi-trace:ftrace/misc-bugfixes-v1 6/7] 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 |
| |
tree: https://git.kernel.org/pub/scm/linux/kernel/git/zanussi/linux-trace.git ftrace/misc-bugfixes-v1 head: a291c672d6e1d7f557d9e15a5ac3f0b446e29dcd commit: b519e15e681319e99055a92c8d090072ebb2b179 [6/7] tracing: Remove size restriction on hist trigger cmd error logging config: i386-randconfig-a002-20220124 (https://download.01.org/0day-ci/archive/20220128/202201281016.u1LRBCEw-lkp@intel.com/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/zanussi/linux-trace.git/commit/?id=b519e15e681319e99055a92c8d090072ebb2b179 git remote add zanussi-trace https://git.kernel.org/pub/scm/linux/kernel/git/zanussi/linux-trace.git git fetch --no-tags zanussi-trace ftrace/misc-bugfixes-v1 git checkout b519e15e681319e99055a92c8d090072ebb2b179 # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash kernel/trace/
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@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:35, 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:759:2, inlined from 'event_hist_trigger_parse' at kernel/trace/trace_events_hist.c:6190:3: >> 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
3009f891bb9f328 Kees Cook 2021-08-02 26 a28a6e860c6cf23 Francis Laniel 2021-02-25 27 #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) a28a6e860c6cf23 Francis Laniel 2021-02-25 28 extern void *__underlying_memchr(const void *p, int c, __kernel_size_t size) __RENAME(memchr); a28a6e860c6cf23 Francis Laniel 2021-02-25 29 extern int __underlying_memcmp(const void *p, const void *q, __kernel_size_t size) __RENAME(memcmp); a28a6e860c6cf23 Francis Laniel 2021-02-25 30 extern void *__underlying_memcpy(void *p, const void *q, __kernel_size_t size) __RENAME(memcpy); a28a6e860c6cf23 Francis Laniel 2021-02-25 31 extern void *__underlying_memmove(void *p, const void *q, __kernel_size_t size) __RENAME(memmove); a28a6e860c6cf23 Francis Laniel 2021-02-25 32 extern void *__underlying_memset(void *p, int c, __kernel_size_t size) __RENAME(memset); a28a6e860c6cf23 Francis Laniel 2021-02-25 33 extern char *__underlying_strcat(char *p, const char *q) __RENAME(strcat); a28a6e860c6cf23 Francis Laniel 2021-02-25 34 extern char *__underlying_strcpy(char *p, const char *q) __RENAME(strcpy); a28a6e860c6cf23 Francis Laniel 2021-02-25 35 extern __kernel_size_t __underlying_strlen(const char *p) __RENAME(strlen); a28a6e860c6cf23 Francis Laniel 2021-02-25 36 extern char *__underlying_strncat(char *p, const char *q, __kernel_size_t count) __RENAME(strncat); a28a6e860c6cf23 Francis Laniel 2021-02-25 37 extern char *__underlying_strncpy(char *p, const char *q, __kernel_size_t size) __RENAME(strncpy); a28a6e860c6cf23 Francis Laniel 2021-02-25 38 #else a28a6e860c6cf23 Francis Laniel 2021-02-25 39 #define __underlying_memchr __builtin_memchr a28a6e860c6cf23 Francis Laniel 2021-02-25 40 #define __underlying_memcmp __builtin_memcmp a28a6e860c6cf23 Francis Laniel 2021-02-25 41 #define __underlying_memcpy __builtin_memcpy a28a6e860c6cf23 Francis Laniel 2021-02-25 42 #define __underlying_memmove __builtin_memmove a28a6e860c6cf23 Francis Laniel 2021-02-25 43 #define __underlying_memset __builtin_memset a28a6e860c6cf23 Francis Laniel 2021-02-25 44 #define __underlying_strcat __builtin_strcat a28a6e860c6cf23 Francis Laniel 2021-02-25 45 #define __underlying_strcpy __builtin_strcpy a28a6e860c6cf23 Francis Laniel 2021-02-25 46 #define __underlying_strlen __builtin_strlen a28a6e860c6cf23 Francis Laniel 2021-02-25 @47 #define __underlying_strncat __builtin_strncat a28a6e860c6cf23 Francis Laniel 2021-02-25 48 #define __underlying_strncpy __builtin_strncpy a28a6e860c6cf23 Francis Laniel 2021-02-25 49 #endif a28a6e860c6cf23 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_francis@privacyrequired.com> :::::: CC: Linus Torvalds <torvalds@linux-foundation.org>
--- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
| |