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Date:   Sat, 18 Feb 2017 13:15:27 +0800
From:   Fengguang Wu <fengguang.wu@...el.com>
To:     linux-usb@...r.kernel.org, Rob Herring <robh@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, LKP <lkp@...org>
Subject: [USB] bea5b158ff WARNING: CPU: 0 PID: 1 at lib/list_debug.c:33
 __list_add

Greetings,

FYI, this debug patch triggers bug in USB subsystem.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

commit bea5b158ff0da9c7246ff391f754f5f38e34577a
Author:     Rob Herring <robh@...nel.org>
AuthorDate: Thu Aug 11 10:20:58 2016 -0500
Commit:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CommitDate: Wed Aug 31 15:13:55 2016 +0200

     driver core: add test of driver remove calls during probe
     
     In recent discussions on ksummit-discuss[1], it was suggested to do a
     sequence of probe, remove, probe for testing driver remove paths. This
     adds a kconfig option for said test.
     
     [1] https://lists.linuxfoundation.org/pipermail/ksummit-discuss/2016-August/003459.html
     
     Suggested-by: Arnd Bergmann <arnd@...db.de>
     Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
     Signed-off-by: Rob Herring <robh@...nel.org>
     Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

+---------------------------------------------------+------------+------------+------------+
|                                                   | cebf8fd169 | bea5b158ff | 54c71a28c0 |
+---------------------------------------------------+------------+------------+------------+
| boot_successes                                    | 122        | 0          | 0          |
| boot_failures                                     | 14         | 34         | 13         |
| BUG:kernel_reboot-without-warning_in_test_stage   | 14         |            |            |
| calltrace:init                                    | 0          | 34         |            |
| WARNING:at_lib/list_debug.c:#__list_add           | 0          | 33         |            |
| WARNING:at_lib/list_debug.c:#__list_add_valid     | 0          | 0          | 13         |
| WARNING:at_kernel/sched/sched.h:#set_next_entity  | 0          | 0          | 1          |
| WARNING:at_drivers/usb/core/urb.c:#usb_submit_urb | 0          | 0          | 1          |
+---------------------------------------------------+------------+------------+------------+

[    2.441910]  0000000000000000 ffff8a87de84fb80 ffffffffbda3a516 ffff8a87dea8af78
[    2.443032]  ffffffffbe7aee60 ffff8a87de84fba0 ffffffffbda3c413 ffff8a87dea8af68
[    2.444034]  00000000fffffff4 ffff8a87de84fbb8 ffffffffbdb78c1f ffff8a87dea8af68
[    2.445070] Call Trace:
[    2.445396]  [<ffffffffbda3a516>] dump_stack+0x86/0xc0
[    2.445989]  [<ffffffffbda3c413>] kobject_init+0x31/0x7f
[    2.446681]  [<ffffffffbdb78c1f>] device_initialize+0x23/0xda
[    2.447514]  [<ffffffffbdb7a67f>] device_register+0xd/0x18
[    2.448194]  [<ffffffffbdc6d513>] usb_add_gadget_udc_release+0xb9/0x249
[    2.449297]  [<ffffffffbdc6d71c>] usb_add_gadget_udc+0xb/0xd
[    2.449899]  [<ffffffffbdc6fa2d>] dummy_udc_probe+0x163/0x1a4
[    2.450631]  [<ffffffffbdb7de5f>] platform_drv_probe+0x35/0x78
[    2.451489]  [<ffffffffbdb7caf4>] driver_probe_device+0x1ab/0x422
[    2.452319]  [<ffffffffbdb7cf27>] __device_attach_driver+0xd1/0xd9
[    2.453151]  [<ffffffffbdb7ce56>] ? driver_allows_async_probing+0xd/0xd
[    2.453921]  [<ffffffffbdb7b2d6>] bus_for_each_drv+0x52/0x87
[    2.454682]  [<ffffffffbdb7c7e2>] __device_attach+0x9e/0x11d
[    2.455410]  [<ffffffffbdb7d063>] device_initial_probe+0xe/0x10
[    2.460573]  [<ffffffffbdb7b4e2>] bus_probe_device+0x2e/0x99
[    2.461589]  [<ffffffffbdb7a4b5>] device_add+0x3d3/0x590
[    2.462613]  [<ffffffffbdb7e513>] platform_device_add+0x17b/0x1db
[    2.463670]  [<ffffffffbeae6c09>] init+0x262/0x374
[    2.464535]  [<ffffffffbeae693e>] ? musb_driver_init+0x14/0x14
[    2.465641]  [<ffffffffbeae69a7>] ? usb_udc_init+0x4b/0x4b
[    2.466642]  [<ffffffffbeaaf6e7>] ? do_early_param+0x8f/0x8f
[    2.467627]  [<ffffffffbeab00e8>] do_one_initcall+0x9a/0x141
[    2.468823]  [<ffffffffbd8af900>] ? parse_args+0x1d4/0x357
[    2.471295]  [<ffffffffbeaaf6e7>] ? do_early_param+0x8f/0x8f
[    2.472203]  [<ffffffffbeab02b4>] kernel_init_freeable+0x125/0x1b4
[    2.473182]  [<ffffffffbdf90923>] kernel_init+0x9/0xeb
[    2.473989]  [<ffffffffbdf971ef>] ret_from_fork+0x1f/0x40
[    2.474840]  [<ffffffffbdf9091a>] ? rest_init+0x131/0x131
[    2.475987] ------------[ cut here ]------------
[    2.476751] WARNING: CPU: 0 PID: 1 at lib/list_debug.c:33 __list_add+0x5f/0xa1
[    2.478203] list_add corruption. prev->next should be next (ffff8a87dd3b2248), but was ffff8a87dd3b2370. (prev=ffff8a87dd3b2370).
[    2.480019] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.8.0-rc4-00003-gbea5b15 #1
[    2.481405]  0000000000000000 ffff8a87de84fa88 ffffffffbda3a516 ffff8a87de84fad8
[    2.482631]  0000000000000000 ffff8a87de84fac8 ffffffffbd89635b 00000021de84fb40
[    2.483848]  ffff8a87dd3b2370 ffff8a87dd3b2248 ffff8a87dd3b2370 ffff8a87de999c00
[    2.485087] Call Trace:
[    2.485482]  [<ffffffffbda3a516>] dump_stack+0x86/0xc0
[    2.486288]  [<ffffffffbd89635b>] __warn+0xb3/0xce
[    2.487039]  [<ffffffffbd8963bc>] warn_slowpath_fmt+0x46/0x4e
[    2.487933]  [<ffffffffbda527fe>] __list_add+0x5f/0xa1
[    2.488747]  [<ffffffffbdf8ff9b>] klist_add_tail+0x32/0x3f
[    2.489605]  [<ffffffffbdb7a4d1>] device_add+0x3ef/0x590
[    2.490446]  [<ffffffffbdc6d5af>] usb_add_gadget_udc_release+0x155/0x249
[    2.491481]  [<ffffffffbdc6d71c>] usb_add_gadget_udc+0xb/0xd
[    2.492364]  [<ffffffffbdc6fa2d>] dummy_udc_probe+0x163/0x1a4
[    2.493253]  [<ffffffffbdb7de5f>] platform_drv_probe+0x35/0x78
[    2.494155]  [<ffffffffbdb7caf4>] driver_probe_device+0x1ab/0x422
[    2.495092]  [<ffffffffbdb7cf27>] __device_attach_driver+0xd1/0xd9
[    2.496046]  [<ffffffffbdb7ce56>] ? driver_allows_async_probing+0xd/0xd
[    2.497068]  [<ffffffffbdb7b2d6>] bus_for_each_drv+0x52/0x87
[    2.497938]  [<ffffffffbdb7c7e2>] __device_attach+0x9e/0x11d
[    2.498817]  [<ffffffffbdb7d063>] device_initial_probe+0xe/0x10
[    2.499732]  [<ffffffffbdb7b4e2>] bus_probe_device+0x2e/0x99
[    2.500606]  [<ffffffffbdb7a4b5>] device_add+0x3d3/0x590
[    2.501413]  [<ffffffffbdb7e513>] platform_device_add+0x17b/0x1db
[    2.502331]  [<ffffffffbeae6c09>] init+0x262/0x374
[    2.503058]  [<ffffffffbeae693e>] ? musb_driver_init+0x14/0x14
[    2.503933]  [<ffffffffbeae69a7>] ? usb_udc_init+0x4b/0x4b
[    2.504775]  [<ffffffffbeaaf6e7>] ? do_early_param+0x8f/0x8f
[    2.505646]  [<ffffffffbeab00e8>] do_one_initcall+0x9a/0x141
[    2.506520]  [<ffffffffbd8af900>] ? parse_args+0x1d4/0x357
[    2.507369]  [<ffffffffbeaaf6e7>] ? do_early_param+0x8f/0x8f
[    2.508243]  [<ffffffffbeab02b4>] kernel_init_freeable+0x125/0x1b4
[    2.509196]  [<ffffffffbdf90923>] kernel_init+0x9/0xeb
[    2.509982]  [<ffffffffbdf971ef>] ret_from_fork+0x1f/0x40
[    2.510819]  [<ffffffffbdf9091a>] ? rest_init+0x131/0x131
[    2.511724] ---[ end trace 503a3de72f73d486 ]---
[    2.512456] ------------[ cut here ]------------

git bisect start v4.9 v4.8 --
git bisect  bad 9fe68cad6e74967b88d0c6aeca7d9cd6b6e91942  # 01:19      0-      7  Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
git bisect  bad 5fa0eb0b4d4780fbd6d8a09850cc4fd539e9fe65  # 01:30      0-     15  Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect  bad d8ea757b25ec82687c497fc90aa83f9bcea24b5b  # 01:42      0-     15  Merge tag 'xtensa-20161005' of git://github.com/jcmvbkbc/linux-xtensa
git bisect  bad e6445f52d9c8b0e6557a45fa7d0e8e088d430a8c  # 01:50      0-     20  Merge tag 'usb-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
git bisect good 1a4a2bc460721bc8f91e4c1294d39b38e5af132f  # 02:08     34+      2  Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 49deffe0b0e4c2030696c7a6fd680bacf4761069  # 02:20     34+      7  Merge tag 'arc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
git bisect good 597f03f9d133e9837d00965016170271d4f87dcf  # 02:32     34+      0  Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect  bad 9929780e86854833e649b39b290b5fe921eb1701  # 02:43      0-      4  Merge tag 'driver-core-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
git bisect good 7a53eea1f7b527fd3b6d7ca992914840981afe99  # 02:56     31+      4  Merge tag 'char-misc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
git bisect  bad 775115c06091fcfa1189a50aca488fa596839617  # 03:04      0-     15  drivers/base dmam_declare_coherent_memory leaks
git bisect  bad 426bc8e789f8ac84270b196191904d347586032f  # 03:14      0-      6  base: soc: make it explicitly non-modular
git bisect  bad bea5b158ff0da9c7246ff391f754f5f38e34577a  # 03:29      0-      3  driver core: add test of driver remove calls during probe
git bisect good cebf8fd16900fdfd58c0028617944f808f97fe50  # 03:43     33+      1  driver core: fix race between creating/querying glue dir and its cleanup
# first bad commit: [bea5b158ff0da9c7246ff391f754f5f38e34577a] driver core: add test of driver remove calls during probe
git bisect good cebf8fd16900fdfd58c0028617944f808f97fe50  # 03:53     93+     13  driver core: fix race between creating/querying glue dir and its cleanup
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect  bad bea5b158ff0da9c7246ff391f754f5f38e34577a  # 04:09      0-      5  driver core: add test of driver remove calls during probe
# extra tests on HEAD of linux-devel/devel-spot-201702112342
git bisect  bad 54c71a28c0eef7975298cf652b81d595fb6cf485  # 04:10      0-     13  0day head guard for 'devel-spot-201702112342'
# extra tests on tree/branch linus/master
git bisect  bad 2fe1e8a7b2f4dcac3fcb07ff06b0ae7396201fd6  # 04:18      0-      5  Merge tag 'powerpc-4.10-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
# extra tests on tree/branch linus/master
git bisect  bad 2fe1e8a7b2f4dcac3fcb07ff06b0ae7396201fd6  # 04:18      0-      5  Merge tag 'powerpc-4.10-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
# extra tests on tree/branch linux-next/master
git bisect  bad 4ce4a759a3e221b5265ebd03c2f8888b69a7cf3e  # 04:36      0-      5  Add linux-next specific files for 20170217


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