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Message-ID: <20161227011150.2pdmdgf4u6u45qoi@wfg-t540p.sh.intel.com>
Date: Tue, 27 Dec 2016 09:11:50 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Rob Herring <robh@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, LKP <lkp@...org>
Subject: [usb_add_gadget_udc_release] bea5b158ff WARNING: CPU: 0 PID: 1 at
lib/kobject.c:597 kobject_get
Greetings,
Here is an USB WARNING triggered by Rob's test patch.
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 | 5cc3c0a7bf |
+---------------------------------------------------+------------+------------+------------+
| boot_successes | 416 | 21 | 1 |
| boot_failures | 4 | 76 | 12 |
| BUG:kernel_reboot-without-warning_in_test_stage | 4 | | |
| calltrace:init | 0 | 76 | |
| WARNING:at_lib/kobject.c:#kobject_get | 0 | 67 | 8 |
| INFO:task_blocked_for_more_than#seconds | 0 | 28 | 7 |
| calltrace:kernfs_notify_workfn | 0 | 23 | |
| calltrace:ret_from_fork | 0 | 28 | |
| RIP:__default_send_IPI_dest_field | 0 | 28 | |
| calltrace:watchdog | 0 | 28 | |
| RIP:kernfs_link_sibling | 0 | 9 | |
| Kernel_panic-not_syncing:hung_task:blocked_tasks | 0 | 28 | 7 |
| BUG:unable_to_handle_kernel | 0 | 3 | 2 |
| Oops | 0 | 3 | 2 |
| RIP:kobject_get | 0 | 3 | |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 3 | 2 |
| RIP:__sanitizer_cov_trace_pc | 0 | 19 | |
| WARNING:at_drivers/usb/core/urb.c:#usb_submit_urb | 0 | 6 | |
| calltrace:hub_init_func2 | 0 | 2 | |
| calltrace:pm_runtime_work | 0 | 4 | |
| calltrace:ring_buffer_producer_thread | 0 | 1 | |
| calltrace:usb_gadget_state_work | 0 | 5 | |
| BUG:kernel_hang_in_test_stage | 0 | 39 | 3 |
| WARNING:at_kernel/workqueue.c:#worker_thread | 0 | 1 | |
+---------------------------------------------------+------------+------------+------------+
[ 21.806527] hub 1-0:1.0: 1 port detected
[ 21.809142] kobject (ffff88001cb86f78): tried to init an initialized object, something is seriously wrong.
[ 21.810522] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.8.0-rc4-00003-gbea5b15 #1
[ 21.824599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 21.826031] 0000000000000297 ffff88001f7c3b48 ffffffff9efb5abe ffff88001cb86f78
[ 21.827157] ffffffffa06ab160 ffff88001cb86ed8 ffff88001cb51820 ffff88001f7c3b68
[ 21.828286] ffffffff9efb8f05 ffff88001cb86f68 ffff88001cb86f68 ffff88001f7c3b80
[ 21.829416] Call Trace:
[ 21.829781] [<ffffffff9efb5abe>] dump_stack+0xb6/0x118
[ 21.830527] [<ffffffff9efb8f05>] kobject_init+0xa5/0xb0
[ 21.831282] [<ffffffff9f57b1fd>] device_initialize+0x2d/0xf0
[ 21.832097] [<ffffffff9f57bf2a>] device_register+0x1a/0x30
[ 21.832888] [<ffffffff9f732626>] usb_add_gadget_udc_release+0xc6/0x370
[ 21.833813] [<ffffffff9f732994>] usb_add_gadget_udc+0x24/0x30
[ 21.847657] [<ffffffff9f7361d1>] dummy_udc_probe+0x1e1/0x240
[ 21.848476] [<ffffffff9f735ff0>] ? dummy_free_request+0xc0/0xc0
[ 21.849348] [<ffffffff9f582c1e>] platform_drv_probe+0x4e/0xd0
[ 21.850181] [<ffffffff9f582bd0>] ? platform_drv_remove+0x60/0x60
[ 21.851049] [<ffffffff9f580eb2>] driver_probe_device+0xd2/0x490
[ 21.851907] [<ffffffff9f581411>] __device_attach_driver+0xb1/0xf0
[ 21.852780] [<ffffffff9f581360>] ? __driver_attach+0xf0/0xf0
[ 21.853598] [<ffffffff9f57eeb2>] bus_for_each_drv+0x92/0xe0
[ 21.854405] [<ffffffff9f580c41>] __device_attach+0xf1/0x170
[ 21.855214] [<ffffffff9f5814bf>] device_initial_probe+0x1f/0x30
[ 21.856068] [<ffffffff9f57f20e>] bus_probe_device+0xde/0xf0
[ 21.856867] [<ffffffff9f57bb6e>] device_add+0x50e/0x780
[ 21.857624] [<ffffffff9f5835d5>] platform_device_add+0xf5/0x2d0
[ 21.858477] [<ffffffffa0a96198>] init+0x328/0x49a
[ 21.859175] [<ffffffffa0a95e70>] ? trace_event_define_fields_udc_log_req+0x25a/0x25a
[ 21.873293] [<ffffffffa0a4041c>] do_one_initcall+0xa5/0x191
[ 21.874108] [<ffffffffa0a4072d>] kernel_init_freeable+0x225/0x2cd
[ 21.874995] [<ffffffff9faffe98>] kernel_init+0x18/0x180
[ 21.875755] [<ffffffff9fb1034f>] ret_from_fork+0x1f/0x40
[ 21.876528] [<ffffffff9faffe80>] ? rest_init+0xd0/0xd0
[ 21.877477] ------------[ cut here ]------------
[ 21.878158] WARNING: CPU: 0 PID: 1 at lib/kobject.c:597 kobject_get+0xd6/0x100
[ 21.879584] kobject: '(null)' (ffff88001cb82a70): is not initialized, yet kobject_get() is being called.
[ 21.880940] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.8.0-rc4-00003-gbea5b15 #1
[ 21.881997] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 21.883418] 0000000000000297 ffff88001f7c3a00 ffffffff9efb5abe ffff88001f7c3a50
[ 21.884546] 0000000000000000 ffffffffa00f2390 ffffffff9efb8fe6 ffff88001f7c3a40
[ 21.885673] ffffffff9ece04cb 00000255a011c933 ffffffffa00f2390 0000000000000255
[ 21.899837] Call Trace:
[ 21.900210] [<ffffffff9efb5abe>] dump_stack+0xb6/0x118
[ 21.900969] [<ffffffff9efb8fe6>] ? kobject_get+0xd6/0x100
[ 21.901747] [<ffffffff9ece04cb>] __warn+0x11b/0x140
[ 21.902460] [<ffffffff9ece0558>] warn_slowpath_fmt+0x68/0x80
[ 21.903282] [<ffffffff9ef40e87>] ? kernfs_put+0x37/0x240
[ 21.904054] [<ffffffff9f57a720>] ? online_show+0x60/0x60
[ 21.904818] [<ffffffff9efb8fe6>] kobject_get+0xd6/0x100
[ 21.905581] [<ffffffff9f57a720>] ? online_show+0x60/0x60
[ 21.906355] [<ffffffff9f57a749>] klist_children_get+0x29/0x40
[ 21.907191] [<ffffffff9fafe9c5>] klist_node_init+0x45/0x50
[ 21.907987] [<ffffffff9fafecfd>] klist_add_tail+0x1d/0x50
[ 21.908761] [<ffffffff9f57bb8a>] device_add+0x52a/0x780
[ 21.909526] [<ffffffff9f57bf32>] device_register+0x22/0x30
[ 21.910329] [<ffffffff9f732626>] usb_add_gadget_udc_release+0xc6/0x370
[ 21.911277] [<ffffffff9f732994>] usb_add_gadget_udc+0x24/0x30
[ 21.912117] [<ffffffff9f7361d1>] dummy_udc_probe+0x1e1/0x240
[ 21.912939] [<ffffffff9f735ff0>] ? dummy_free_request+0xc0/0xc0
[ 21.913795] [<ffffffff9f582c1e>] platform_drv_probe+0x4e/0xd0
[ 21.914625] [<ffffffff9f582bd0>] ? platform_drv_remove+0x60/0x60
[ 21.915490] [<ffffffff9f580eb2>] driver_probe_device+0xd2/0x490
[ 21.916351] [<ffffffff9f581411>] __device_attach_driver+0xb1/0xf0
[ 21.917238] [<ffffffff9f581360>] ? __driver_attach+0xf0/0xf0
[ 21.918060] [<ffffffff9f57eeb2>] bus_for_each_drv+0x92/0xe0
[ 21.918870] [<ffffffff9f580c41>] __device_attach+0xf1/0x170
[ 21.919691] [<ffffffff9f5814bf>] device_initial_probe+0x1f/0x30
[ 21.920554] [<ffffffff9f57f20e>] bus_probe_device+0xde/0xf0
[ 21.921368] [<ffffffff9f57bb6e>] device_add+0x50e/0x780
[ 21.922134] [<ffffffff9f5835d5>] platform_device_add+0xf5/0x2d0
[ 21.922990] [<ffffffffa0a96198>] init+0x328/0x49a
[ 21.923674] [<ffffffffa0a95e70>] ? trace_event_define_fields_udc_log_req+0x25a/0x25a
[ 21.924782] [<ffffffffa0a4041c>] do_one_initcall+0xa5/0x191
[ 21.925597] [<ffffffffa0a4072d>] kernel_init_freeable+0x225/0x2cd
[ 21.926483] [<ffffffff9faffe98>] kernel_init+0x18/0x180
[ 21.927243] [<ffffffff9fb1034f>] ret_from_fork+0x1f/0x40
[ 21.928015] [<ffffffff9faffe80>] ? rest_init+0xd0/0xd0
[ 21.929031] ---[ end trace def35186a836ffe3 ]---
[ 65.318331] Writes: Total: 2 Max/Min: 0/0 Fail: 0
git bisect start v4.9 v4.8 --
git bisect bad 9fe68cad6e74967b88d0c6aeca7d9cd6b6e91942 # 01:19 7- 11 Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
git bisect bad 5fa0eb0b4d4780fbd6d8a09850cc4fd539e9fe65 # 01:37 0- 1 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad d8ea757b25ec82687c497fc90aa83f9bcea24b5b # 01:50 0- 1 Merge tag 'xtensa-20161005' of git://github.com/jcmvbkbc/linux-xtensa
git bisect bad e6445f52d9c8b0e6557a45fa7d0e8e088d430a8c # 02:01 1- 2 Merge tag 'usb-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
git bisect good 1a4a2bc460721bc8f91e4c1294d39b38e5af132f # 03:16 50+ 0 Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 49deffe0b0e4c2030696c7a6fd680bacf4761069 # 03:40 54+ 0 Merge tag 'arc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
git bisect good 597f03f9d133e9837d00965016170271d4f87dcf # 04:19 53+ 0 Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 9929780e86854833e649b39b290b5fe921eb1701 # 04:47 2- 2 Merge tag 'driver-core-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
git bisect good 7a53eea1f7b527fd3b6d7ca992914840981afe99 # 07:37 51+ 1 Merge tag 'char-misc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
git bisect bad 775115c06091fcfa1189a50aca488fa596839617 # 07:49 8- 3 drivers/base dmam_declare_coherent_memory leaks
git bisect bad 426bc8e789f8ac84270b196191904d347586032f # 08:08 1- 1 base: soc: make it explicitly non-modular
git bisect bad bea5b158ff0da9c7246ff391f754f5f38e34577a # 08:30 3- 2 driver core: add test of driver remove calls during probe
git bisect good cebf8fd16900fdfd58c0028617944f808f97fe50 # 11:35 100+ 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 # 14:28 306+ 4 driver core: fix race between creating/querying glue dir and its cleanup
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad bea5b158ff0da9c7246ff391f754f5f38e34577a # 14:44 13- 7 driver core: add test of driver remove calls during probe
# extra tests on HEAD of linux-devel/devel-spot-201612242150
git bisect bad 5cc3c0a7bfc339d9960e6c946a678d179a2aa03c # 14:44 0- 12 0day head guard for 'devel-spot-201612242150'
# extra tests on tree/branch linus/master
git bisect bad 7c0f6ba682b9c7632072ffbedf8d328c8f3c42ba # 14:55 3- 4 Replace <asm/uaccess.h> with <linux/uaccess.h> globally
# extra tests on tree/branch linus/master
git bisect bad 7c0f6ba682b9c7632072ffbedf8d328c8f3c42ba # 14:55 0- 4 Replace <asm/uaccess.h> with <linux/uaccess.h> globally
# extra tests on tree/branch linux-next/master
git bisect bad 84ede50b623fb45c4c026c80d0abf8cc5193f041 # 15:12 1- 1 Add linux-next specific files for 20161224
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
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