tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable head: 3271cacfede84a7e27d318fdf12fbeb7cab7b305 commit: 082b07014f97afe25e73493a58f21b45c2742cd7 [315/342] kmsan: support SLAB_POISON config: arc-allnoconfig (https://download.01.org/0day-ci/archive/20231215/202312151925.c1R7UpLE-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231215/202312151925.c1R7UpLE-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/202312151925.c1R7UpLE-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): mm/slub.c: In function 'init_object': >> mm/slub.c:1038:17: error: implicit declaration of function '__memset'; did you mean 'memset'? [-Werror=implicit-function-declaration] 1038 | __memset(p - s->red_left_pad, val, s->red_left_pad); | ^~~~~~~~ | memset cc1: some warnings being treated as errors vim +1038 mm/slub.c 1026 1027 static void init_object(struct kmem_cache *s, void *object, u8 val) 1028 { 1029 u8 *p = kasan_reset_tag(object); 1030 unsigned int poison_size = s->object_size; 1031 1032 if (s->flags & SLAB_RED_ZONE) { 1033 /* 1034 * Use __memset() here and below in order to avoid overwriting 1035 * the KMSAN shadow. Keeping the shadow makes it possible to 1036 * distinguish uninit-value from use-after-free. 1037 */ > 1038 __memset(p - s->red_left_pad, val, s->red_left_pad); 1039 1040 if (slub_debug_orig_size(s) && val == SLUB_RED_ACTIVE) { 1041 /* 1042 * Redzone the extra allocated space by kmalloc than 1043 * requested, and the poison size will be limited to 1044 * the original request size accordingly. 1045 */ 1046 poison_size = get_orig_size(s, object); 1047 } 1048 } 1049 1050 if (s->flags & __OBJECT_POISON) { 1051 __memset(p, POISON_FREE, poison_size - 1); 1052 __memset(p + poison_size - 1, POISON_END, 1); 1053 } 1054 1055 if (s->flags & SLAB_RED_ZONE) 1056 __memset(p + poison_size, val, s->inuse - poison_size); 1057 } 1058 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
