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Message-ID: <57f9b719.ZbgXIq6T5yLgw6dl%fengguang.wu@intel.com>
Date: Sun, 09 Oct 2016 11:18:49 +0800
From: kernel test robot <fengguang.wu@...el.com>
To: Rob Herring <robh@...nel.org>
Cc: LKP <lkp@...org>, linux-kernel@...r.kernel.org,
"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
wfg@...ux.intel.com
Subject: [driver core] bea5b158ff: BUG: unable to handle kernel NULL
pointer dereference at 00000008
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
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 | 22341813e4 |
+----------------------------------------------+------------+------------+------------+
| boot_successes | 66 | 2 | 0 |
| boot_failures | 0 | 25 | 13 |
| calltrace:init | 0 | 25 | 13 |
| Oops | 0 | 25 | 13 |
| EIP_is_at_cmos_alarm_irq_enable | 0 | 10 | |
| calltrace:rtc_timer_do_work | 0 | 10 | |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 25 | 13 |
| BUG:unable_to_handle_kernel | 0 | 24 | 13 |
| EIP_is_at_kobject_get | 0 | 14 | 10 |
| WARNING:at_lib/kobject.c:#kobject_get | 0 | 1 | 3 |
| WARNING:at_include/linux/kref.h:#kobject_get | 0 | 1 | 3 |
| EIP_is_at_kernfs_link_sibling | 0 | 1 | |
| EIP_is_at_rb_next | 0 | 0 | 3 |
| calltrace:SyS_getdents64 | 0 | 0 | 3 |
+----------------------------------------------+------------+------------+------------+
[ 13.513705] hub 1-0:1.0: 1 port detected
[ 13.516309] kobject (8f92f8b4): tried to init an initialized object, something is seriously wrong.
[ 13.518358] CPU: 0 PID: 1 Comm: swapper Not tainted 4.8.0-rc4-00003-gbea5b15 #1
[ 13.520014] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 13.522207] 8f92f8b4 8f92f8b4 80031d20 88bb56c9 80031d3c 88bb7dd3 898316d4 8f92f8b4
[ 13.524132] 8f92f868 899b8c6c 8f92f8ac 80031d4c 88d83cce 8f92f868 8f92f8ac 80031d58
[ 13.526087] 88d844bb 8f92f868 80031d84 88ef3c1d 00000000 89863eac 00000000 8004f760
[ 13.527980] Call Trace:
[ 13.528540] [<88bb56c9>] dump_stack+0x16/0x1d
[ 13.529544] [<88bb7dd3>] kobject_init+0x73/0x80
[ 13.530602] [<88d83cce>] device_initialize+0x1e/0xe0
[ 13.531889] [<88d844bb>] device_register+0xb/0x20
[ 13.532997] [<88ef3c1d>] usb_add_gadget_udc_release+0x8d/0x270
[ 13.534333] [<88ef3e9a>] usb_add_gadget_udc+0xa/0x10
[ 13.535465] [<88ef775e>] dummy_udc_probe+0x14e/0x1a0
[ 13.536623] [<88d89781>] platform_drv_probe+0x31/0x90
[ 13.537830] [<88d875aa>] ? driver_sysfs_add+0x6a/0x90
[ 13.539014] [<88d87e3a>] driver_probe_device+0x12a/0x490
[ 13.540228] [<88cbc39b>] ? acpi_driver_match_device+0x36/0x50
[ 13.541658] [<88d88307>] __device_attach_driver+0x77/0x110
[ 13.542946] [<8949712d>] ? klist_next+0x6d/0x10c
[ 13.544053] [<88d88290>] ? __driver_attach+0xf0/0xf0
[ 13.545180] [<88d864f7>] bus_for_each_drv+0x47/0x80
[ 13.549626] [<88d87b85>] __device_attach+0xb5/0x130
[ 13.550493] [<88d88290>] ? __driver_attach+0xf0/0xf0
[ 13.551517] [<88d883cd>] device_initial_probe+0xd/0x10
[ 13.552485] [<88d86787>] bus_probe_device+0x77/0x80
[ 13.553298] [<88d8417e>] device_add+0x34e/0x5a0
[ 13.554025] [<88bc4840>] ? kvasprintf_const+0x40/0x90
[ 13.554860] [<88bb7d1b>] ? kobject_set_name_vargs+0x6b/0x90
[ 13.555770] [<88d89e6c>] platform_device_add+0xfc/0x280
[ 13.556640] [<89ad0b84>] init+0x20b/0x2ec
[ 13.557317] [<89ad0979>] ? usb_udc_init+0x3f/0x3f
[ 13.558154] [<89a96c1d>] do_one_initcall+0x7c/0xfb
[ 13.558947] [<89a96d5e>] ? kernel_init_freeable+0xc2/0x15e
[ 13.559851] [<89a96d81>] kernel_init_freeable+0xe5/0x15e
[ 13.560726] [<894974fb>] kernel_init+0xb/0x100
[ 13.561705] [<888c727c>] ? schedule_tail+0xc/0x50
[ 13.562786] [<894a1942>] ret_from_kernel_thread+0xe/0x24
[ 13.563993] [<894974f0>] ? rest_init+0x110/0x110
[ 13.566155] usbip_core: USB/IP Core v1.0.0
[ 13.567699] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
git bisect start 22341813e4f22b37a3ce407d38b9bbee2a7078e0 c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 --
git bisect bad 89f4c4d289e073a2546bc95a7ad6e12fa4061932 # 07:43 0- 13 Merge 'pci/pci/host-artpec' into devel-spot-201610090650
git bisect bad d37cb675bdd683df0f66aee97bfec998bc53c697 # 07:53 0- 21 Merge 'linux-review/Scott-Branden/pwm-add-depends-COMPILE_TEST-and-default-y-for-brcm-iproc-pwm/20161009-045725' into devel-spot-201610090650
git bisect bad 8c74fa8cc9ccae63e976236fad42538032b39045 # 08:02 0- 6 Merge 'linux-review/Spencer-E-Olson/staging-comedi-porting-NI_GPCT-constants-from-comedi-org-module/20161009-055916' into devel-spot-201610090650
git bisect good 84e69c27b991cbfff02299c3b54035379e3abb2b # 08:15 20+ 0 0day base guard for 'devel-spot-201610090650'
git bisect bad 5691f0e9a3e7855832d5fd094801bf600347c2d0 # 08:28 0- 3 Merge tag 'sound-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
git bisect bad 3ddf40e8c31964b744ff10abb48c8e36a83ec6e7 # 08:41 1- 10 mm: filemap: fix mapping->nrpages double accounting in fuse
git bisect bad 9929780e86854833e649b39b290b5fe921eb1701 # 08:48 0- 11 Merge tag 'driver-core-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
git bisect good 12b7bcb43e6ea834ab2f5dc52d971e379a0ca109 # 08:59 22+ 0 Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 5e1b834b27fb2c27cde33a0752425f11d10c0b2d # 09:10 23+ 0 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 1892fc2ee4c08d7ac17adb93f1341d9c3d7bdaf6 # 09:21 23+ 0 mei: stop the stall timer worker if not needed
git bisect good 999dcbe2414e15e19cdc1f91497d01f262c6e1cf # 09:30 23+ 0 Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good dd6d7c6f3dc136c1bec6def840f7fa53f84d1fe6 # 09:38 23+ 0 mips/octeon/smp: Convert to hotplug state machine
git bisect bad a1a9e5d29854f69a881b4c1e6ac2d6b54f49dfc6 # 09:42 0- 7 debugfs: propagate release() call result
git bisect bad 59fffa34069d80662b41438b11130771b4e2a897 # 09:50 0- 9 cpu: clean up register_cpu func
git bisect bad 85714108e673cdebf1b96abfd50fb02a29e37577 # 09:59 0- 10 drivers: base: dma-mapping: page align the size when unmap_kernel_range
git bisect good cebf8fd16900fdfd58c0028617944f808f97fe50 # 10:10 23+ 0 driver core: fix race between creating/querying glue dir and its cleanup
git bisect bad c90aab9c96c2a7f7bf3f7a54167dc5c0ba2b178c # 10:22 0- 4 platform driver: fix use-after-free in platform_device_del()
git bisect bad bea5b158ff0da9c7246ff391f754f5f38e34577a # 10:35 0- 12 driver core: add test of driver remove calls during probe
# first bad commit: [bea5b158ff0da9c7246ff391f754f5f38e34577a] driver core: add test of driver remove calls during probe
git bisect good cebf8fd16900fdfd58c0028617944f808f97fe50 # 10:38 66+ 0 driver core: fix race between creating/querying glue dir and its cleanup
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad bea5b158ff0da9c7246ff391f754f5f38e34577a # 10:45 0- 8 driver core: add test of driver remove calls during probe
# extra tests on HEAD of linux-devel/devel-spot-201610090650
git bisect bad 22341813e4f22b37a3ce407d38b9bbee2a7078e0 # 10:45 0- 13 0day head guard for 'devel-spot-201610090650'
# extra tests on tree/branch linus/master
git bisect bad b66484cd74706fa8681d051840fe4b18a3da40ff # 10:53 0- 1 Merge branch 'akpm' (patches from Andrew)
# extra tests with first bad commit reverted
git bisect good d1d2ab885ff09dbdccbbc528e1bf7a2a7b467c43 # 11:10 64+ 0 Revert "driver core: add test of driver remove calls during probe"
# extra tests on tree/branch linus/master
git bisect bad b66484cd74706fa8681d051840fe4b18a3da40ff # 11:10 0- 68 Merge branch 'akpm' (patches from Andrew)
# extra tests on tree/branch linux-next/master
git bisect bad c802e87fbe2d4dd58982d01b3c39bc5a781223aa # 11:18 0- 35 Add linux-next specific files for 20161006
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
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