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Message-ID: <20180419031449.gp3tw74rtvccyjki@wfg-t540p.sh.intel.com>
Date:   Thu, 19 Apr 2018 11:14:49 +0800
From:   Fengguang Wu <fengguang.wu@...el.com>
To:     Paul Blakey <paulb@...lanox.com>
Cc:     linux-kernel@...r.kernel.org, lkp@...org,
        Thomas Graf <tgraf@...g.ch>,
        Daniel Borkmann <daniel@...earbox.net>,
        Florian Westphal <fw@...len.de>,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: 499ac3b60f ("test_rhashtable: add test case for rhltable with
 duplicate objects"): WARNING: CPU: 0 PID: 1 at lib/debugobjects.c:328
 __debug_object_init

Greetings,

0day kernel testing robot got the below dmesg and the first bad commit is

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master

commit 499ac3b60f657dae82055fc81c7b01e6242ac9bc
Author:     Paul Blakey <paulb@...lanox.com>
AuthorDate: Sun Mar 4 17:29:49 2018 +0200
Commit:     David S. Miller <davem@...emloft.net>
CommitDate: Wed Mar 7 10:44:03 2018 -0500

     test_rhashtable: add test case for rhltable with duplicate objects
     
     Tries to insert duplicates in the middle of bucket's chain:
     bucket 1:  [[val 21 (tid=1)]] -> [[ val 1 (tid=2),  val 1 (tid=0) ]]
     
     Reuses tid to distinguish the elements insertion order.
     
     Signed-off-by: Paul Blakey <paulb@...lanox.com>
     Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
     Signed-off-by: David S. Miller <davem@...emloft.net>

d3dcf8eb61  rhashtable: Fix rhlist duplicates insertion
499ac3b60f  test_rhashtable: add test case for rhltable with duplicate objects
+----------------------------------------------------+------------+------------+
|                                                    | d3dcf8eb61 | 499ac3b60f |
+----------------------------------------------------+------------+------------+
| boot_successes                                     | 28         | 0          |
| boot_failures                                      | 0          | 15         |
| WARNING:at_lib/debugobjects.c:#__debug_object_init | 0          | 15         |
| EIP:__debug_object_init                            | 0          | 15         |
| Mem-Info                                           | 0          | 2          |
+----------------------------------------------------+------------+------------+

[    9.724580]   Duration of test: 115289366 ns
[    9.736431] test if its possible to exceed max_size 8192: no, ok
[    9.737933] Average test time: 118138571
[    9.738694] test inserting duplicates
[    9.739384] ODEBUG: object is on stack, but not annotated
[    9.740024] WARNING: CPU: 0 PID: 1 at lib/debugobjects.c:328 __debug_object_init+0x17b/0x380
[    9.740024] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.16.0-rc4-00130-g499ac3b #1
[    9.740024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[    9.740024] EIP: __debug_object_init+0x17b/0x380
[    9.740024] EFLAGS: 00210096 CPU: 0
[    9.740024] EAX: 0000002d EBX: c0023e3c ECX: c0080ae0 EDX: 00000000
[    9.740024] ESI: c2403d14 EDI: c2e99fa0 EBP: c2e99f9c ESP: c0023d90
[    9.740024]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[    9.740024] CR0: 80050033 CR2: 00000000 CR3: 02828000 CR4: 00000690
[    9.740024] Call Trace:
[    9.740024]  ? kstrtos8_from_user+0x50/0x50
[    9.740024]  ? rhashtable_init+0x1ff/0x2d0
[    9.740024]  ? rhltable_init+0xf/0x20
[    9.740024]  ? test_insert_dup+0x38/0x430
[    9.740024]  ? __lock_acquire+0x47c/0x8a0
[    9.740024]  ? kstrtos8_from_user+0x50/0x50
[    9.740024]  ? jhash+0x120/0x120
[    9.740024]  ? my_hashfn+0x30/0x30
[    9.740024]  ? test_rht_init+0x2bd/0x55f
[    9.740024]  ? test_rhashtable+0x40f/0x40f
[    9.740024]  ? do_one_initcall+0x7c/0x120
[    9.740024]  ? kernel_init_freeable+0xcc/0x164
[    9.740024]  ? kernel_init_freeable+0xec/0x164
[    9.740024]  ? rest_init+0x110/0x110
[    9.740024]  ? kernel_init+0x5/0xe0
[    9.740024]  ? ret_from_fork+0x19/0x24
[    9.740024] Code: 00 39 d3 0f 83 32 01 00 00 83 7c 24 08 01 74 20 89 4c 24 08 68 14 3d 40 c2 83 c0 01 a3 cc a7 e3 c2 e8 7f 90 ab ff 5e 8b 4c 24 08 <0f> 0b 8d 76 00 8b 41 08 83 f8 03 74 48 72 36 83 f8 04 75 0c ba
[    9.740024] ---[ end trace 0df84646a6fe1676 ]---
[    9.763142] 

                                                           # HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start f495aa00f6e9a7241096abc57c000cf2f98a2a40 661e50bc853209e41a5c14a290ca4decc43cbfd1 --
git bisect good 48d0d60ce4ae55c6e81020c638e4031faf8e8b92  # 04:31  G     11     0    0   0  Merge 'krzk/for-next' into devel-hourly-2018030913
git bisect good 1f5ca3de3b75425387c5fe59906a03e4fa6573ad  # 04:49  G     11     0    1   1  Merge 'anholt/for-next' into devel-hourly-2018030913
git bisect  bad 7e454c4a43319dd82b50bc7374dff990b51ee05b  # 05:04  B      0     1   14   0  Merge 'block/for-next' into devel-hourly-2018030913
git bisect  bad 223f4a9a8596ee7d6b4ca78605320f4eba725eb8  # 05:24  B      0     8   21   0  Merge 'jkirsher-net-queue/dev-queue' into devel-hourly-2018030913
git bisect good 3078ca90f959c821b41933bac8bacbf49cdaf624  # 05:50  G     10     0    5   5  Merge 'lpieralisi-pci/pci/rcar' into devel-hourly-2018030913
git bisect  bad 89036a2a9852f70dcec97d5962974fe806828382  # 06:04  B      0     7   20   0  Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth
git bisect good 25b5cdfcce1b57971840505dfc78556bd12dea6d  # 06:19  G     11     0    5   5  dt-bindings: net: renesas-ravb: Make stream buffer optional
git bisect  bad 803fafbe0cd522fa6b9e41ca3b96cfb2e2a2222d  # 06:35  B      0     5   18   0  fsl/fman: avoid sleeping in atomic context while adding an address
git bisect  bad 499ac3b60f657dae82055fc81c7b01e6242ac9bc  # 06:53  B      0     2   15   0  test_rhashtable: add test case for rhltable with duplicate objects
git bisect good d3dcf8eb615537526bd42ff27a081d46d337816e  # 07:09  G     11     0    2   2  rhashtable: Fix rhlist duplicates insertion
# first bad commit: [499ac3b60f657dae82055fc81c7b01e6242ac9bc] test_rhashtable: add test case for rhltable with duplicate objects
git bisect good d3dcf8eb615537526bd42ff27a081d46d337816e  # 07:19  G     30     0    8  10  rhashtable: Fix rhlist duplicates insertion
# extra tests with debug options
git bisect  bad 499ac3b60f657dae82055fc81c7b01e6242ac9bc  # 07:35  B      0     5   18   0  test_rhashtable: add test case for rhltable with duplicate objects
# extra tests on HEAD of linux-devel/devel-hourly-2018030913
git bisect  bad f495aa00f6e9a7241096abc57c000cf2f98a2a40  # 07:40  B      0    57   73   0  0day head guard for 'devel-hourly-2018030913'
# extra tests on tree/branch linux-next/master
# extra tests with first bad commit reverted

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/lkp                          Intel Corporation

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