linux-kernel - Re: [PATCH v2 3/3] mm: perform the mapping_map_writable() check after call

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Date:   Tue, 16 May 2023 13:52:06 +0800
From:   kernel test robot <yujie.liu@...el.com>
To:     Lorenzo Stoakes <lstoakes@...il.com>
CC:     <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Muchun Song <muchun.song@...ux.dev>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>,
        "Andy Lutomirski" <luto@...capital.net>,
        <linux-fsdevel@...r.kernel.org>, Jan Kara <jack@...e.cz>,
        Hugh Dickins <hughd@...gle.com>,
        Lorenzo Stoakes <lstoakes@...il.com>
Subject: Re: [PATCH v2 3/3] mm: perform the mapping_map_writable() check
 after call_mmap()

Hello,

kernel test robot noticed "assertion_failure" on:

commit: a0e22a91f487957346732c6613eb6bd1b7c72ab1 ("[PATCH v2 3/3] mm: perform the mapping_map_writable() check after call_mmap()")
url: https://github.com/intel-lab-lkp/linux/commits/Lorenzo-Stoakes/mm-drop-the-assumption-that-VM_SHARED-always-implies-writable/20230501-062815
base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/all/6f3aea05c9cc46094b029cbd1138d163c1ae7f9d.1682890156.git.lstoakes@gmail.com/
patch subject: [PATCH v2 3/3] mm: perform the mapping_map_writable() check after call_mmap()

in testcase: igt
version: igt-x86_64-9e9cd7e6-1_20230506
with following parameters:

	group: group-11

compiler: gcc-11
test machine: 20 threads 1 sockets (Commet Lake) with 16G memory

(please refer to attached dmesg/kmsg for entire log/backtrace)

If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@...el.com>
| Link: https://lore.kernel.org/oe-lkp/202305161044.bba89e76-yujie.liu@intel.com

2023-05-11 12:29:38 build/tests/gem_mmap_gtt --run-subtest basic-copy
IGT-Version: 1.27.1-g9e9cd7e6 (x86_64) (Linux: 6.3.0-10673-ga0e22a91f487 x86_64)
Starting subtest: basic-copy
(gem_mmap_gtt:1138) i915/gem_mman-CRITICAL: Test assertion failure function gem_mmap__gtt, file ../lib/i915/gem_mman.c:146:
(gem_mmap_gtt:1138) i915/gem_mman-CRITICAL: Failed assertion: ptr
(gem_mmap_gtt:1138) i915/gem_mman-CRITICAL: Last errno: 1, Operation not permitted
Subtest basic-copy failed.
**** DEBUG ****
(gem_mmap_gtt:1138) i915/gem_mman-CRITICAL: Test assertion failure function gem_mmap__gtt, file ../lib/i915/gem_mman.c:146:
(gem_mmap_gtt:1138) i915/gem_mman-CRITICAL: Failed assertion: ptr
(gem_mmap_gtt:1138) i915/gem_mman-CRITICAL: Last errno: 1, Operation not permitted
(gem_mmap_gtt:1138) igt_core-INFO: Stack trace:
(gem_mmap_gtt:1138) igt_core-INFO:   #0 [__igt_fail_assert+0x106]
(gem_mmap_gtt:1138) igt_core-INFO:   #1 [gem_mmap__gtt+0x3c]
(gem_mmap_gtt:1138) igt_core-INFO:   #2 ../tests/i915/gem_mmap_gtt.c:89 create_pointer_size()
(gem_mmap_gtt:1138) igt_core-INFO:   #3 ../tests/i915/gem_mmap_gtt.c:97 __igt_unique____real_main1261()
(gem_mmap_gtt:1138) igt_core-INFO:   #4 ../tests/i915/gem_mmap_gtt.c:1261 main()
(gem_mmap_gtt:1138) igt_core-INFO:   #5 ../csu/libc-start.c:308 __libc_start_main()
(gem_mmap_gtt:1138) igt_core-INFO:   #6 [_start+0x2a]
****  END  ****
Stack trace:
  #0 [__igt_fail_assert+0x106]
  #1 [gem_mmap__gtt+0x3c]
  #2 ../tests/i915/gem_mmap_gtt.c:89 create_pointer_size()
  #3 ../tests/i915/gem_mmap_gtt.c:97 __igt_unique____real_main1261()
  #4 ../tests/i915/gem_mmap_gtt.c:1261 main()
  #5 ../csu/libc-start.c:308 __libc_start_main()
  #6 [_start+0x2a]
Subtest basic-copy: FAIL (0.039s)
...

To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.

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

View attachment "config-6.3.0-10673-ga0e22a91f487" of type "text/plain" (162107 bytes)

View attachment "job-script" of type "text/plain" (5092 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (57732 bytes)

View attachment "igt" of type "text/plain" (109810 bytes)

View attachment "job.yaml" of type "text/plain" (4422 bytes)

View attachment "reproduce" of type "text/plain" (5543 bytes)