Hi Oscar, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.3-rc7] [cannot apply to akpm-mm/mm-everything next-20230421] [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/Oscar-Salvador/lib-stackdepot-Add-a-refcount-field-in-stack_record/20230421-181709 base: linus/master patch link: https://lore.kernel.org/r/20230421101415.5734-3-osalvador%40suse.de patch subject: [PATCH v4 2/3] mm, page_owner: Add page_owner_stacks file to print out only stacks and their counte config: x86_64-randconfig-m001 (https://download.01.org/0day-ci/archive/20230422/202304221906.CKlcyd2r-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202304221906.CKlcyd2r-lkp@xxxxxxxxx/ smatch warnings: lib/stackdepot.c:558 stack_print() warn: unsigned 'stack->size' is never less than zero. vim +558 lib/stackdepot.c 551 552 int stack_print(struct seq_file *m, void *v) 553 { 554 char *buf; 555 int ret = 0; 556 struct stack_record *stack =v; 557 > 558 if (!stack->size || stack->size < 0 || 559 stack->size > PAGE_SIZE || stack->handle.valid != 1 || 560 refcount_read(&stack->count) < 1) 561 return 0; 562 563 buf = kzalloc(PAGE_SIZE, GFP_KERNEL); 564 ret += stack_trace_snprint(buf, PAGE_SIZE, stack->entries, stack->size, 0); 565 scnprintf(buf + ret, PAGE_SIZE - ret, "stack count: %d\n\n", 566 refcount_read(&stack->count)); 567 seq_printf(m, buf); 568 seq_puts(m, "\n\n"); 569 kfree(buf); 570 571 return 0; 572 } 573 #endif 574 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
