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Message-ID: <5c311e1d.zWvPPeZmc2ZfPYk0%lkp@intel.com>
Date: Sun, 06 Jan 2019 05:14:05 +0800
From: kernel test robot <lkp@...el.com>
To: "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
Cc: LKP <lkp@...org>, linux-kernel@...r.kernel.org,
linux-block@...r.kernel.org
Subject: 1aba551c73 ("blk-mq: fix changelog"): BUG: unable to handle
kernel NULL pointer dereference at 00000000
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/driver-core.git debugfs_cleanup
commit 1aba551c73de605983515118d5ad527594440ccb
Author: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
AuthorDate: Fri Jan 4 14:06:22 2019 +0100
Commit: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CommitDate: Sat Jan 5 18:42:10 2019 +0100
blk-mq: fix changelog
7d7009c53a wireless: fix changelog
1aba551c73 blk-mq: fix changelog
6044acd966 lib: WIP, break up
+------------------------------------------+------------+------------+------------+
| | 7d7009c53a | 1aba551c73 | 6044acd966 |
+------------------------------------------+------------+------------+------------+
| boot_successes | 32 | 0 | 0 |
| boot_failures | 0 | 22 | 19 |
| BUG:unable_to_handle_kernel | 0 | 22 | 19 |
| Oops:#[##] | 0 | 22 | 19 |
| EIP:debugfs_create_files | 0 | 22 | 19 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 22 | 19 |
+------------------------------------------+------------+------------+------------+
[ 19.240778] parport_pc 00:04: reported by Plug and Play ACPI
[ 19.249983] parport0: PC-style at 0x378, irq 7 [PCSPP(,...)]
[ 19.259854] lp0: using parport0 (interrupt-driven).
[ 19.266789] lp0: console ready
[ 19.294331] brd: module loaded
[ 19.303672] BUG: unable to handle kernel NULL pointer dereference at 00000000
[ 19.311670] #PF error: [normal kernel read fault]
[ 19.312646] *pdpt = 0000000000000000 *pde = f000ff53f000ff53
[ 19.312646] Oops: 0000 [#1] PTI
[ 19.312646] CPU: 0 PID: 1 Comm: swapper Tainted: G T 4.20.0-11094-g1aba551 #440
[ 19.312646] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 19.312646] EIP: debugfs_create_files+0x20/0x60
[ 19.312646] Code: 74 26 00 8d bc 27 00 00 00 00 55 89 e5 56 89 c6 53 83 ec 08 85 c0 74 42 3d 00 f0 ff ff 77 3b 8b 40 10 89 cb 89 90 a4 00 00 00 <8b> 01 85 c0 74 2a 8d 76 00 8d bc 27 00 00 00 00 0f b7 53 04 b9 00
[ 19.312646] EAX: db0c1ae0 EBX: 00000000 ECX: 00000000 EDX: d9f41400
[ 19.312646] ESI: db0aa500 EDI: d9f41400 EBP: db45be38 ESP: db45be28
[ 19.312646] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068 EFLAGS: 00210287
[ 19.312646] CR0: 80050033 CR2: 00000000 CR3: 028ca000 CR4: 001406f0
[ 19.312646] Call Trace:
[ 19.312646] blk_mq_debugfs_register_sched_hctx+0x36/0x40
[ 19.312646] blk_mq_debugfs_register+0xb1/0xd0
[ 19.312646] blk_register_queue+0xa1/0x170
[ 19.312646] __device_add_disk+0x2af/0x4a0
[ 19.312646] device_add_disk+0x12/0x20
[ 19.312646] loop_add+0x1b9/0x240
[ 19.312646] loop_init+0xfd/0x12f
[ 19.312646] ? brd_init+0x15c/0x15c
[ 19.312646] do_one_initcall+0x68/0x134
[ 19.312646] ? loglevel+0x47/0x47
[ 19.312646] kernel_init_freeable+0xe1/0x15b
[ 19.312646] ? rest_init+0x90/0x90
[ 19.312646] kernel_init+0xb/0x100
[ 19.312646] ? schedule_tail_wrapper+0x9/0x10
[ 19.312646] ret_from_fork+0x19/0x30
[ 19.312646] CR2: 0000000000000000
[ 19.312646] ---[ end trace 3fa233f5a018a515 ]---
[ 19.312646] EIP: debugfs_create_files+0x20/0x60
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 6044acd966af9b2abf150dde97c9092e174f5c32 3fed6ae4b027f9c93be18520f87bd06bdffd196b --
git bisect good 9e34cf7c199ca0088d4704b5c246a915ed336419 # 03:36 G 11 0 0 0 ti: wl1251: no need to check return value of debugfs_create functions
git bisect good 2b1612f9f11109c49b327401b9deb5e7f42ae9aa # 03:48 G 11 0 0 2 gcov: no need to check return value of debugfs_create functions
git bisect good ea485bd98e3c0b4a8ace4f43a6099b28ac37d62d # 03:59 G 11 0 0 0 l2tp: fix changelog
git bisect bad 4f6a5da79aa189934d6ff9244efccb4e166d4648 # 04:11 B 0 10 31 7 gfs: no need to check return value of debugfs_create functions
git bisect good 7d7009c53a3be411a6a790ac2788677db27d7286 # 04:24 G 11 0 0 0 wireless: fix changelog
git bisect bad b73f975f76e48705feb505327cd888bb0ec9eb14 # 04:32 B 0 1 15 0 btrfs: no need to check return value of debugfs_create functions
git bisect bad 1aba551c73de605983515118d5ad527594440ccb # 04:43 B 0 10 35 11 blk-mq: fix changelog
# first bad commit: [1aba551c73de605983515118d5ad527594440ccb] blk-mq: fix changelog
git bisect good 7d7009c53a3be411a6a790ac2788677db27d7286 # 04:48 G 30 0 0 0 wireless: fix changelog
# extra tests with debug options
git bisect bad 1aba551c73de605983515118d5ad527594440ccb # 05:00 B 0 11 25 0 blk-mq: fix changelog
# extra tests on HEAD of driver-core/debugfs_cleanup
git bisect bad 6044acd966af9b2abf150dde97c9092e174f5c32 # 05:00 B 0 19 37 0 lib: WIP, break up
# extra tests on tree/branch driver-core/debugfs_cleanup
git bisect bad 6044acd966af9b2abf150dde97c9092e174f5c32 # 05:01 B 0 19 37 0 lib: WIP, break up
# extra tests with first bad commit reverted
git bisect good 208036c036ff14e7144a6653bb611f9466d76852 # 05:13 G 10 0 0 0 Revert "blk-mq: fix changelog"
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
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