netdev - [lkp-robot] [test_rhashtable] c1bd3689a7: WARNING:at_lib/debugobjects.c:#__debug_object

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Date:   Wed, 20 Sep 2017 09:54:57 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Florian Westphal <fw@...len.de>
Cc:     netdev@...r.kernel.org, Florian Westphal <fw@...len.de>, lkp@...org
Subject: [lkp-robot] [test_rhashtable]  c1bd3689a7:
 WARNING:at_lib/debugobjects.c:#__debug_object_init


FYI, we noticed the following commit:

commit: c1bd3689a70d1ba1a2f7c6781770920087166018 ("test_rhashtable: add test case for rhl_table interface")
url: https://github.com/0day-ci/linux/commits/Florian-Westphal/test_rhashtable-add-test-case-for-rhl-table/20170919-135550


in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -smp 2 -m 512M

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+---------------------------------------------------------+------------+------------+
|                                                         | 1c29afe6df | c1bd3689a7 |
+---------------------------------------------------------+------------+------------+
| boot_successes                                          | 4          | 6          |
| boot_failures                                           | 44         | 2          |
| BUG:-#unexpected_failures(out_of#)-debugging_disabled!| | 44         | 2          |
| WARNING:at_lib/debugobjects.c:#__debug_object_init      | 0          | 2          |
| BUG:kernel_hang_in_test_stage                           | 0          | 2          |
+---------------------------------------------------------+------------+------------+



[   15.235031] WARNING: CPU: 0 PID: 1 at lib/debugobjects.c:328 __debug_object_init+0x794/0x930
[   15.235031] CPU: 0 PID: 1 Comm: swapper Not tainted 4.14.0-rc1-00033-gc1bd368 #1
[   15.235031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[   15.235031] task: ffff880011720040 task.stack: ffff880011728000
[   15.235031] RIP: 0010:__debug_object_init+0x794/0x930
[   15.235031] RSP: 0000:ffff88001172f948 EFLAGS: 00010002
[   15.235031] RAX: 000000000000002d RBX: 0000000000000001 RCX: 0000000000000000
[   15.235031] RDX: 000000000000002d RSI: 0000000000000001 RDI: ffffed00022e5f1f
[   15.235031] RBP: ffff88001172fa08 R08: 0000000000000001 R09: 0000000000000000
[   15.235031] R10: 0000000000000000 R11: ffffffffb8741b5b R12: ffff880011720040
[   15.235031] R13: ffff880011482ac0 R14: ffffffffb8a4ce50 R15: ffff88001172f9e0
[   15.235031] FS:  0000000000000000(0000) GS:ffffffffb5ea1000(0000) knlGS:0000000000000000
[   15.235031] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   15.235031] CR2: 0000000000000000 CR3: 0000000017e20000 CR4: 00000000000006f0
[   15.235031] Call Trace:
[   15.235031]  ? __debug_check_no_obj_freed+0x521/0x521
[   15.235031]  ? get_random_u32+0x1b8/0x1f6
[   15.235031]  ? bucket_table_alloc+0x167/0x236
[   15.235031]  debug_object_init+0x22/0x2b
[   15.235031]  __init_work+0x37/0x40
[   15.235031]  rhashtable_init+0x5ef/0x6c3
[   15.235031]  rhltable_init+0x57/0x97
[   15.235031]  test_rhltable+0x1a5/0x682c
[   15.235031]  ? depot_save_stack+0x327/0x4f5
[   15.235031]  ? kasan_slab_free+0x1b8/0x1e0
[   15.235031]  ? save_stack_trace+0x1c/0x25
[   15.235031]  ? kasan_slab_free+0xe2/0x1e0
[   15.235031]  ? __vunmap+0x2a6/0x2ba
[   15.235031]  ? vfree+0xbb/0xc4
[   15.235031]  ? test_rht_init+0xbbf/0xc22
[   15.235031]  ? kernel_init_freeable+0x474/0x5f2
[   15.235031]  ? list_sort_test+0x8d7/0x8d7
[   15.235031]  ? __debug_check_no_obj_freed+0x3c3/0x521
[   15.235031]  ? reacquire_held_locks+0x284/0x284
[   15.235031]  ? lock_acquire+0x18c/0x23f
[   15.235031]  ? __debug_check_no_obj_freed+0x130/0x521
[   15.235031]  ? config_name_store+0x98/0x98
[   15.235031]  ? __vunmap+0x2a6/0x2ba
[   15.235031]  test_rht_init+0xbd1/0xc22
[   15.235031]  ? test_rhashtable+0x1050/0x1050
[   15.235031]  do_one_initcall+0x1b7/0x463
[   15.235031]  ? start_kernel+0xd41/0xd41
[   15.235031]  kernel_init_freeable+0x474/0x5f2
[   15.235031]  ? rest_init+0x1b4/0x1b4
[   15.235031]  kernel_init+0x13/0x1ba
[   15.235031]  ? rest_init+0x1b4/0x1b4
[   15.235031]  ret_from_fork+0x25/0x30
[   15.235031] Code: 83 bd 4c ff ff ff 01 74 2b ff c3 48 c7 c7 40 27 db b4 48 ff 05 1b 34 87 05 89 1d 35 42 87 05 e8 c1 17 b2 ff 48 ff 05 19 34 87 05 <0f> ff 48 ff 05 20 34 87 05 49 8d 5d 10 48 b8 00 00 00 00 00 fc 
[   15.235031] ---[ end trace 57d54481cc1a28fe ]---


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong

View attachment "config-4.14.0-rc1-00033-gc1bd368" of type "text/plain" (116580 bytes)

View attachment "job-script" of type "text/plain" (3928 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (20456 bytes)