2:04 a.m.
I was able to reproduce this on my machine, but it doesn't seem to
consistently NPE in the same place. I am guessing this is due to
memory corruption from somewhere. I am going to keep playing around
with this.
On Wed, Feb 5, 2020 at 4:08 AM kernel test robot <lkp(a)intel.com> wrote:
>
> Greetings,
>
> 0day kernel testing robot got the below dmesg and the first bad commit is
>
>
https://github.com/0day-ci/linux/commits/Brendan-Higgins/kunit-create-a-c...
>
> commit 2c7abad74010ee4f27b0b1f3c68353171e19967b
> Author: Alan Maguire <alan.maguire(a)oracle.com>
> AuthorDate: Thu Jan 30 15:08:08 2020 -0800
> Commit: 0day robot <lkp(a)intel.com>
> CommitDate: Mon Feb 3 03:50:54 2020 +0800
>
> kunit: test: create a single centralized executor for all tests
>
> Add a centralized executor to dispatch tests rather than relying on
> late_initcall to schedule each test suite separately. Centralized
> execution is for built-in tests only; modules will execute tests
> when loaded.
>
> Signed-off-by: Alan Maguire <alan.maguire(a)oracle.com>
> Co-developed-by: Iurii Zaikin <yzaikin(a)google.com>
> Signed-off-by: Iurii Zaikin <yzaikin(a)google.com>
> Co-developed-by: Brendan Higgins <brendanhiggins(a)google.com>
> Signed-off-by: Brendan Higgins <brendanhiggins(a)google.com>
> Reviewed-by: Stephen Boyd <sboyd(a)kernel.org>
>
> bf1af76d02 arch: um: add linker section for KUnit test suites
> 2c7abad740 kunit: test: create a single centralized executor for all tests
> 11385b32f9 Documentation: Add kunit_shutdown to kernel-parameters.txt
>
+-----------------------------------------------------------+------------+------------+------------+
> | | bf1af76d02 | 2c7abad740
| 11385b32f9 |
>
+-----------------------------------------------------------+------------+------------+------------+
> | boot_successes | 28 | 1
| 0 |
> | boot_failures | 7 | 10
| 7 |
> | WARNING:at_kernel/rcu/rcutorture.c:#rcutorture_oom_notify | 1 |
| |
> | EIP:rcutorture_oom_notify | 1 |
| |
> | Mem-Info | 1 |
| |
> | BUG:kernel_NULL_pointer_dereference,address | 1 | 7
| 7 |
> | Oops:#[##] | 1 | 7
| 7 |
> | EIP:rcu_torture_fwd_cb_hist | 1 |
| |
> | Kernel_panic-not_syncing:Fatal_exception | 3 | 7
| 7 |
> | kernel_BUG_at_mm/vmalloc.c | 2 |
| |
> | invalid_opcode:#[##] | 2 |
| |
> | EIP:alloc_vmap_area | 2 |
| |
> | BUG:kernel_timeout_in_torture_test_stage | 4 | 3
| |
> | EIP:kunit_run_all_tests | 0 | 7
| 7 |
>
+-----------------------------------------------------------+------------+------------+------------+
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <lkp(a)intel.com>
>
> [ 409.675220] ok 7 - sysctl_test_dointvec_write_happy_single_positive
> [ 409.675796] ok 8 - sysctl_test_dointvec_write_happy_single_negative
> [ 409.676601] ok 9 - sysctl_test_api_dointvec_write_single_less_int_min
> [ 409.678166] ok 10 - sysctl_test_api_dointvec_write_single_greater_int_max
> [ 409.679009] ok 1 - sysctl_test
> [ 409.679449] BUG: kernel NULL pointer dereference, address: 00000000
> [ 409.680224] #PF: supervisor read access in kernel mode
> [ 409.680846] #PF: error_code(0x0000) - not-present page
> [ 409.682123] *pdpt = 0000000000000000 *pde = f000ff53f000ff53
> [ 409.682801] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI
> [ 409.683475] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G T
5.5.0-08693-g2c7abad74010e #1
> [ 409.684540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1
04/01/2014
> [ 409.685584] EIP: kunit_run_all_tests+0x22/0x43
> [ 409.686112] Code: 8d 65 f4 5b 5e 5f 5d c3 55 89 e5 57 56 31 f6 53 bb b0 44 3a 5d
eb 1c 8b 3b eb 0f e8 86 f7 ff ff 85 c0 b0 01 0f 45 f0 83 c7 04 <8b> 07 85 c0 75 eb
83 c3 04 81 fb bc 44 3a 5d 72 dc 89 f0 3c 01 19
> [ 409.688277] EAX: 00000000 EBX: 5d3a44b4 ECX: 00000000 EDX: 00000001
> [ 409.689019] ESI: 00000000 EDI: 00000000 EBP: 40073f28 ESP: 40073f1c
> [ 409.689841] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010293
> [ 409.690633] CR0: 80050033 CR2: 00000000 CR3: 1d516000 CR4: 003406b0
> [ 409.691386] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> [ 409.692226] DR6: fffe0ff0 DR7: 00000400
> [ 409.692690] Call Trace:
> [ 409.693002] ? kunit_try_catch_run+0xd1/0xd1
> [ 409.693550] ? do_one_initcall+0xa4/0x1cd
> [ 409.694053] ? trace_initcall_level+0x7e/0x82
> [ 409.694559] ? kernel_init_freeable+0x100/0x16f
> [ 409.695092] ? kernel_init_freeable+0x118/0x16f
> [ 409.695628] ? rest_init+0xdc/0xdc
> [ 409.696032] ? kernel_init+0x8/0xd5
> [ 409.696452] ? ret_from_fork+0x2e/0x38
> [ 409.696882] Modules linked in:
> [ 409.697290] CR2: 0000000000000000
> [ 409.697628] ---[ end trace 045ceeef56b43c7f ]---
> [ 409.697984] EIP: kunit_run_all_tests+0x22/0x43
>
> # HH:MM RESULT GOOD BAD
GOOD_BUT_DIRTY DIRTY_NOT_BAD
> git bisect start 7f777d6b2b6ba2646d7facc3c6201073ff3d91ed
d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 --
> git bisect good 213420b8b9d31ed07f465bfeecc4ac136b12eb2f # 20:37 G 10 0
1 4 Merge 'hwmon/hwmon' into devel-catchup-202002030406
> git bisect bad 71e7078961cd57921eccfcea97a5ac01652a3372 # 21:38 B 0 1
17 0 Merge
'linux-review/Brendan-Higgins/kunit-create-a-centralized-executor-to-dispatch-all-KUnit-tests/20200203-035040'
into devel-catchup-202002030406
> git bisect good a2c8e1e21fa488760d9854643c459b9d13fa1d0e # 22:18 G 10 0
2 2 Merge 'linux-review/Yulia-Kartseva/runqslower-fix-Makefile/20200203-035351'
into devel-catchup-202002030406
> git bisect good 8f9cc5912605f2f915ba317d01d0076068f0a7e2 # 23:55 G 10 0
2 2 Merge
'linux-review/Vinicius-Costa-Gomes/igc-Add-initial-TSN-qdiscs-offloading/20200203-025747'
into devel-catchup-202002030406
> git bisect bad 0401f14bd224ed7f2d47b0b9f27bdfbb1552c399 # 00:29 B 0 1
17 0 init: main: add KUnit to kernel init
> git bisect good bf1af76d02c3998127b3164b1b5e8638f175a602 # 01:39 G 10 0
3 3 arch: um: add linker section for KUnit test suites
> git bisect bad 2c7abad74010ee4f27b0b1f3c68353171e19967b # 02:24 B 0 1
17 0 kunit: test: create a single centralized executor for all tests
> # first bad commit: [2c7abad74010ee4f27b0b1f3c68353171e19967b] kunit: test: create a
single centralized executor for all tests
> git bisect good bf1af76d02c3998127b3164b1b5e8638f175a602 # 03:04 G 30 0
2 6 arch: um: add linker section for KUnit test suites
> # extra tests with debug options
> git bisect good 2c7abad74010ee4f27b0b1f3c68353171e19967b # 03:42 G 10 0
10 10 kunit: test: create a single centralized executor for all tests
> # extra tests on head commit of
linux-review/Brendan-Higgins/kunit-create-a-centralized-executor-to-dispatch-all-KUnit-tests/20200203-035040
> git bisect bad 11385b32f9e52707959f8566f2c719e66159d2e0 # 04:29 B 0 1
17 0 Documentation: Add kunit_shutdown to kernel-parameters.txt
> # bad: [11385b32f9e52707959f8566f2c719e66159d2e0] Documentation: Add kunit_shutdown
to kernel-parameters.txt
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation