Hi, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [cannot apply to linus/master v6.7-rc7 next-20231222] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/andrey-konovalov-linux-dev/kasan-stop-leaking-stack-trace-handles/20231227-065314 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20231226225121.235865-1-andrey.konovalov%40linux.dev patch subject: [PATCH mm] kasan: stop leaking stack trace handles config: x86_64-randconfig-123-20231227 (https://download.01.org/0day-ci/archive/20231228/202312280213.6j147JJb-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/20231228/202312280213.6j147JJb-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/202312280213.6j147JJb-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> mm/kasan/generic.c:506:6: warning: no previous prototype for 'release_alloc_meta' [-Wmissing-prototypes] 506 | void release_alloc_meta(struct kasan_alloc_meta *meta) | ^~~~~~~~~~~~~~~~~~ >> mm/kasan/generic.c:517:6: warning: no previous prototype for 'release_free_meta' [-Wmissing-prototypes] 517 | void release_free_meta(const void *object, struct kasan_free_meta *meta) | ^~~~~~~~~~~~~~~~~ vim +/release_alloc_meta +506 mm/kasan/generic.c 505 > 506 void release_alloc_meta(struct kasan_alloc_meta *meta) 507 { 508 /* Evict the stack traces from stack depot. */ 509 stack_depot_put(meta->alloc_track.stack); 510 stack_depot_put(meta->aux_stack[0]); 511 stack_depot_put(meta->aux_stack[1]); 512 513 /* Zero out alloc meta to mark it as invalid. */ 514 __memset(meta, 0, sizeof(*meta)); 515 } 516 > 517 void release_free_meta(const void *object, struct kasan_free_meta *meta) 518 { 519 /* Check if free meta is valid. */ 520 if (*(u8 *)kasan_mem_to_shadow(object) != KASAN_SLAB_FREE_META) 521 return; 522 523 /* Evict the stack trace from the stack depot. */ 524 stack_depot_put(meta->free_track.stack); 525 526 /* Mark free meta as invalid. */ 527 *(u8 *)kasan_mem_to_shadow(object) = KASAN_SLAB_FREE; 528 } 529 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
