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Date:	Mon, 15 Feb 2016 16:20:45 +0800
From:	kernel test robot <fengguang.wu@...el.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	LKP <lkp@...org>, linux-kernel@...r.kernel.org,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	wfg@...ux.intel.com
Subject: [ppdev] e7223f1860:  kernel BUG at drivers/base/driver.c:153!

Greetings,

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

https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git char-misc-testing

commit e7223f18603374d235d8bb0398532323e5f318b9
Author:     Sudip Mukherjee <sudipm.mukherjee@...il.com>
AuthorDate: Fri Feb 12 18:33:45 2016 +0530
Commit:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CommitDate: Sun Feb 14 17:43:50 2016 -0800

    ppdev: use new parport device model
    
    Modify ppdev driver to use the new parallel port device model.
    
    Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

+---------------------------------------------------------------------+------------+------------+------------+
|                                                                     | 3c8db58432 | e7223f1860 | 8eb81b9e40 |
+---------------------------------------------------------------------+------------+------------+------------+
| boot_successes                                                      | 29         | 0          | 0          |
| boot_failures                                                       | 67         | 30         | 26         |
| Kernel_panic-not_syncing:Attempted_to_kill_init!exitcode=           | 67         |            |            |
| kernel_BUG_at_drivers/base/driver.c                                 | 0          | 30         | 26         |
| invalid_opcode:#[##]                                                | 0          | 30         | 26         |
| invalid_opcode:#[##]PREEMPT_PREEMPT_DEBUG_PAGEALLOC_DEBUG_PAGEALLOC | 0          | 30         | 26         |
| RIP:driver_register                                                 | 0          | 30         | 26         |
| Kernel_panic-not_syncing:Fatal_exception                            | 0          | 30         | 26         |
| backtrace:ppdev_init                                                | 0          | 30         | 26         |
| backtrace:kernel_init_freeable                                      | 0          | 30         | 26         |
+---------------------------------------------------------------------+------------+------------+------------+

[    1.808834] Non-volatile memory driver v1.3
[    1.810078] ------------[ cut here ]------------
[    1.810078] ------------[ cut here ]------------
[    1.810982] kernel BUG at drivers/base/driver.c:153!
[    1.810982] kernel BUG at drivers/base/driver.c:153!
[    1.812297] invalid opcode: 0000 [#1] 
[    1.812297] invalid opcode: 0000 [#1] PREEMPT PREEMPT DEBUG_PAGEALLOC DEBUG_PAGEALLOC 

[    1.813465] CPU: 0 PID: 1 Comm: swapper Not tainted 4.5.0-rc4-00154-ge7223f1 #2
[    1.813465] CPU: 0 PID: 1 Comm: swapper Not tainted 4.5.0-rc4-00154-ge7223f1 #2
[    1.814852] task: ffff88000f468000 ti: ffff88000f46c000 task.ti: ffff88000f46c000
[    1.814852] task: ffff88000f468000 ti: ffff88000f46c000 task.ti: ffff88000f46c000
[    1.816276] RIP: 0010:[<ffffffff816e0e51>] 
[    1.816276] RIP: 0010:[<ffffffff816e0e51>]  [<ffffffff816e0e51>] driver_register+0xa1/0xd0
 [<ffffffff816e0e51>] driver_register+0xa1/0xd0
[    1.817855] RSP: 0000:ffff88000f46fe70  EFLAGS: 00010246
[    1.817855] RSP: 0000:ffff88000f46fe70  EFLAGS: 00010246
[    1.818867] RAX: ffffffff82ef039c RBX: 000000000e136c08 RCX: 0000000000000000
[    1.818867] RAX: ffffffff82ef039c RBX: 000000000e136c08 RCX: 0000000000000000
[    1.820206] RDX: ffffffff82ef039c RSI: ffffffff83459b80 RDI: ffffffff83456428
[    1.820206] RDX: ffffffff82ef039c RSI: ffffffff83459b80 RDI: ffffffff83456428
[    1.821559] RBP: ffff88000f46fe88 R08: 0000000000000001 R09: 0000000000000000
[    1.821559] RBP: ffff88000f46fe88 R08: 0000000000000001 R09: 0000000000000000
[    1.822913] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff83456400
[    1.822913] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff83456400
[    1.824259] R13: 0000000000000000 R14: ffffffff836bd0b0 R15: 0000000000000000
[    1.824259] R13: 0000000000000000 R14: ffffffff836bd0b0 R15: 0000000000000000
[    1.825613] FS:  0000000000000000(0000) GS:ffffffff83221000(0000) knlGS:0000000000000000
[    1.825613] FS:  0000000000000000(0000) GS:ffffffff83221000(0000) knlGS:0000000000000000
[    1.827147] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.827147] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.828240] CR2: 0000000000000000 CR3: 0000000003210000 CR4: 00000000001406b0
[    1.828240] CR2: 0000000000000000 CR3: 0000000003210000 CR4: 00000000001406b0
[    1.829590] Stack:
[    1.829590] Stack:
[    1.829988]  ffffffff816d7c89
[    1.829988]  ffffffff816d7c89 000000000e136c08 000000000e136c08 ffffffff8364e617 ffffffff8364e617 ffff88000f46fea0 ffff88000f46fea0

[    1.831442]  ffffffff8364e695
[    1.831442]  ffffffff8364e695 ffff88000e136af0 ffff88000e136af0 ffff88000f46ff10 ffff88000f46ff10 ffffffff8361e0b5 ffffffff8361e0b5

[    1.832903]  0000000000000000
[    1.832903]  0000000000000000 ffffffff8312c928 ffffffff8312c928 000005ca00060006 000005ca00060006 ffffffff82f32904 ffffffff82f32904

[    1.834368] Call Trace:
[    1.834368] Call Trace:
[    1.834841]  [<ffffffff816d7c89>] ? __parport_register_driver+0x39/0x100
[    1.834841]  [<ffffffff816d7c89>] ? __parport_register_driver+0x39/0x100
[    1.836121]  [<ffffffff8364e617>] ? rng_init+0x12/0x12
[    1.836121]  [<ffffffff8364e617>] ? rng_init+0x12/0x12
[    1.837099]  [<ffffffff8364e695>] ppdev_init+0x7e/0xcb
[    1.837099]  [<ffffffff8364e695>] ppdev_init+0x7e/0xcb
[    1.838081]  [<ffffffff8361e0b5>] do_one_initcall+0xf0/0x183
[    1.838081]  [<ffffffff8361e0b5>] do_one_initcall+0xf0/0x183
[    1.839164]  [<ffffffff8361e249>] kernel_init_freeable+0x101/0x187
[    1.839164]  [<ffffffff8361e249>] kernel_init_freeable+0x101/0x187
[    1.840344]  [<ffffffff82695b10>] ? rest_init+0x130/0x130
[    1.840344]  [<ffffffff82695b10>] ? rest_init+0x130/0x130
[    1.841379]  [<ffffffff82695b19>] kernel_init+0x9/0xe0
[    1.841379]  [<ffffffff82695b19>] kernel_init+0x9/0xe0
[    1.842366]  [<ffffffff8269fb1f>] ret_from_fork+0x3f/0x70
[    1.842366]  [<ffffffff8269fb1f>] ret_from_fork+0x3f/0x70
[    1.843405]  [<ffffffff82695b10>] ? rest_init+0x130/0x130
[    1.843405]  [<ffffffff82695b10>] ? rest_init+0x130/0x130
[    1.844437] Code: 
[    1.844437] Code: ff ff 85 85 c0 c0 41 41 89 89 c4 c4 75 75 13 13 48 48 8b 8b 7b 7b 70 70 31 31 f6 f6 e8 e8 47 47 d3 d3 e8 e8 ff ff 44 44 89 89 e0 e0 5b 5b 41 41 5c 5c 5d 5d c3 c3 48 48 89 89 df df e8 e8 b7 b7 df df ff ff ff ff 44 44 89 89 e0 e0 5b 5b 41 41 5c 5c 5d 5d c3 c3 <0f> <0f> 0b 0b 48 48 8b 8b 33 33 48 48 c7 c7 c7 c7 58 58 f3 f3 f8 f8 82 82 e8 e8 ed ed 24 24 a5 a5 ff ff 48 48 8b 8b 73 73 08 08 

[    1.848930] RIP 
[    1.848930] RIP  [<ffffffff816e0e51>] driver_register+0xa1/0xd0
 [<ffffffff816e0e51>] driver_register+0xa1/0xd0
[    1.850075]  RSP <ffff88000f46fe70>
[    1.850075]  RSP <ffff88000f46fe70>
[    1.850780] ---[ end trace 301e5f19aca79aa0 ]---
[    1.850780] ---[ end trace 301e5f19aca79aa0 ]---

git bisect start 8eb81b9e40322ecdc7c326ca3d429af82dc71c45 18558cae0272f8fd9647e69d3fec1565a7949865 --
git bisect good 81177251dd233e878a3ab7fa4fb34a9d985c69ab  # 11:25     22+      1  Merge 'tty/tty-testing' into devel-catchup-201602151050
git bisect  bad 408808ab2ab758c6fa1bdec8fe4d7f7120779186  # 11:33      0-     12  Merge 'linux-review/Simon-Horman/MAINTAINERS-Update-mailing-list-for-Renesas-ARM64-SoC-Development/20160215-095242' into devel-catchup-201602151050
git bisect good 0a6b1d10601e41de57eeadcf17164d7e668425b7  # 11:41     22+      0  Merge 'jsakkine-tpmdd/master' into devel-catchup-201602151050
git bisect  bad 84e1e09d3107ab136b1e932d9d8e6fe9097e21be  # 11:47      0-     24  Merge 'char-misc/char-misc-testing' into devel-catchup-201602151050
git bisect good 52210c8745e418f82f3f0aeeee01d7bc4858812a  # 12:03     22+      7  coresight: implementing 'cpu_id()' API
git bisect good 202cdb6f889bf45e1cb4883e1727e9909152b777  # 12:10     22+      0  drivers: char: raw: Removed unnecessary braces
git bisect good 990162f038400bd229685316beea1155be095125  # 12:17     22+     14  char: nwbutton: avoid unused variable warning
git bisect good 6ddf2f0cb1e1931d16e08e30130ed04e5a441f2c  # 12:26     22+     18  misc: mic: use after free printing error message
git bisect good 83e80605cc3ce6a2ac966151cd515f691e4835e0  # 12:32     22+     24  ppdev: remove braces
git bisect good 3c8db584323875a50696718c89d94cef0ed54f30  # 12:39     22+     22  ppdev: remove space before tab
git bisect  bad 396ec3dea3d82d0a32906efe9803a8ef2647df51  # 12:47      0-     23  ppdev: use dev_* macros
git bisect  bad e7223f18603374d235d8bb0398532323e5f318b9  # 12:51      0-     24  ppdev: use new parport device model
# first bad commit: [e7223f18603374d235d8bb0398532323e5f318b9] ppdev: use new parport device model
git bisect good 3c8db584323875a50696718c89d94cef0ed54f30  # 12:54     66+     67  ppdev: remove space before tab
# extra tests with DEBUG_INFO
git bisect  bad e7223f18603374d235d8bb0398532323e5f318b9  # 13:00      0-      3  ppdev: use new parport device model
# extra tests on HEAD of linux-devel/devel-catchup-201602151050
git bisect  bad 8eb81b9e40322ecdc7c326ca3d429af82dc71c45  # 13:00      0-     26  0day head guard for 'devel-catchup-201602151050'
# extra tests on tree/branch char-misc/char-misc-testing
git bisect  bad 396ec3dea3d82d0a32906efe9803a8ef2647df51  # 13:08      0-     30  ppdev: use dev_* macros
# extra tests with first bad commit reverted
git bisect good 695d7d11b66df48501e9b9f6f4bf94e28817b2ca  # 15:48     62+     44  Revert "ppdev: use new parport device model"
# extra tests on tree/branch linus/master
git bisect good 1926e54f115725a9248d0c4c65c22acaf94de4c4  # 16:07     62+      8  MAINTAINERS: Update mailing list for Renesas ARM64 SoC Development
# extra tests on tree/branch linux-next/master
git bisect good 2625f908fc0cbd7e40483217772888529ecbdfd1  # 16:20     64+     64  Add linux-next specific files for 20160215


This script may reproduce the error.

----------------------------------------------------------------------------
#!/bin/bash

kernel=$1
initrd=yocto-minimal-x86_64.cgz

wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd

kvm=(
	qemu-system-x86_64
	-enable-kvm
	-cpu Haswell,+smep,+smap
	-kernel $kernel
	-initrd $initrd
	-m 256
	-smp 1
	-device e1000,netdev=net0
	-netdev user,id=net0
	-boot order=nc
	-no-reboot
	-watchdog i6300esb
	-rtc base=localtime
	-serial stdio
	-display none
	-monitor null 
)

append=(
	hung_task_panic=1
	earlyprintk=ttyS0,115200
	systemd.log_level=err
	debug
	apic=debug
	sysrq_always_enabled
	rcupdate.rcu_cpu_stall_timeout=100
	panic=-1
	softlockup_panic=1
	nmi_watchdog=panic
	oops=panic
	load_ramdisk=2
	prompt_ramdisk=0
	console=ttyS0,115200
	console=tty0
	vga=normal
	root=/dev/ram0
	rw
	drbd.minor_count=8
)

"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------

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

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