linux-kernel - Re: [PATCH 1/9] mm: kmemleak: properly disable task stack scanning

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Message-ID: <202301241355.ytFzL2p6-lkp@intel.com>
Date:   Tue, 24 Jan 2023 13:46:57 +0800
From:   kernel test robot <lkp@...el.com>
To:     George Prekas <george@...abrica.net>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Cc:     oe-kbuild-all@...ts.linux.dev,
        Catalin Marinas <catalin.marinas@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Christoph Lameter <cl@...ux-foundation.org>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Andrei Vagin <avagin@...il.com>,
        George Prekas <george@...abrica.net>
Subject: Re: [PATCH 1/9] mm: kmemleak: properly disable task stack scanning

Hi George,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on vbabka-slab/for-next]
[also build test WARNING on linus/master v6.2-rc5 next-20230123]
[cannot apply to akpm-mm/mm-everything]
[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/George-Prekas/mm-kmemleak-properly-disable-task-stack-scanning/20230124-010911
base:   git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git for-next
patch link:    https://lore.kernel.org/r/20230123170419.7292-2-george%40enfabrica.net
patch subject: [PATCH 1/9] mm: kmemleak: properly disable task stack scanning
config: arc-randconfig-r043-20230123 (https://download.01.org/0day-ci/archive/20230124/202301241355.ytFzL2p6-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/f0d9df4305849ecea4402bc614cadb0dd357da77
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review George-Prekas/mm-kmemleak-properly-disable-task-stack-scanning/20230124-010911
        git checkout f0d9df4305849ecea4402bc614cadb0dd357da77
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   mm/kmemleak.c: In function 'kmemleak_mark_stack':
>> mm/kmemleak.c:1244:46: warning: passing argument 1 of 'find_and_get_object' makes integer from pointer without a cast [-Wint-conversion]
    1244 |                 object = find_and_get_object(ptr, 0);
         |                                              ^~~
         |                                              |
         |                                              const void *
   mm/kmemleak.c:561:66: note: expected 'long unsigned int' but argument is of type 'const void *'
     561 | static struct kmemleak_object *find_and_get_object(unsigned long ptr, int alias)
         |                                                    ~~~~~~~~~~~~~~^~~


vim +/find_and_get_object +1244 mm/kmemleak.c

  1233	
  1234	/**
  1235	 * kmemleak_mark_stack - mark the allocated object as a kernel stack
  1236	 *
  1237	 * @ptr:	pointer to beginning of the object
  1238	 */
  1239	void __ref kmemleak_mark_stack(const void *ptr)
  1240	{
  1241		struct kmemleak_object *object;
  1242	
  1243		if (kmemleak_enabled && ptr && !IS_ERR(ptr)) {
> 1244			object = find_and_get_object(ptr, 0);
  1245			if (object) {
  1246				object->flags |= OBJECT_STACK;
  1247				put_object(object);
  1248			}
  1249		}
  1250	}
  1251	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests