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Date: Sun, 06 Jan 2019 01:18:42 +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: 047fb56f7e ("blk-mq: fix changelog"): BUG: unable to handle
kernel NULL pointer dereference at 00000030
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 047fb56f7ecf53620d6e93fbcc8ca9166108d14c
Author: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
AuthorDate: Fri Jan 4 14:06:22 2019 +0100
Commit: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CommitDate: Fri Jan 4 17:29:15 2019 +0100
blk-mq: fix changelog
464573328e wireless: fix changelog
047fb56f7e blk-mq: fix changelog
24aeb03f70 lib: WIP, break up
+------------------------------------------+------------+------------+------------+
| | 464573328e | 047fb56f7e | 24aeb03f70 |
+------------------------------------------+------------+------------+------------+
| boot_successes | 33 | 0 | 0 |
| boot_failures | 0 | 13 | 19 |
| BUG:unable_to_handle_kernel | 0 | 13 | 19 |
| Oops:#[##] | 0 | 13 | 19 |
| EIP:debugfs_create_files | 0 | 13 | 19 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 13 | 19 |
+------------------------------------------+------------+------------+------------+
[ 1.939685] toshiba: not a supported Toshiba laptop
[ 1.940314] platform pc8736x_gpio.0: NatSemi pc8736x GPIO Driver Initializing
[ 1.941204] platform pc8736x_gpio.0: no device found
[ 1.941848] nsc_gpio initializing
[ 1.942249] Hangcheck: starting hangcheck timer 0.9.1 (tick is 180 seconds, margin is 60 seconds).
[ 1.943923] BUG: unable to handle kernel NULL pointer dereference at 00000030
[ 1.944889] #PF error: [normal kernel read fault]
[ 1.945527] *pdpt = 0000000000000000 *pde = f000ff53f000ff53
[ 1.946287] Oops: 0000 [#1] SMP PTI
[ 1.946760] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 4.20.0-11088-g047fb56 #1
[ 1.947149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 1.947149] Workqueue: events_unbound async_run_entry_fn
[ 1.947149] EIP: debugfs_create_files+0x9/0x50
[ 1.947149] Code: 00 e8 db 11 52 00 8b 16 8b 4e 04 8d 83 c0 03 00 00 e8 4b 24 da ff 5b 5e 5d c3 8d b4 26 00 00 00 00 55 89 e5 56 53 89 c6 89 cb <8b> 40 30 89 90 14 02 00 00 8b 01 85 c0 74 26 90 8d b4 26 00 00 00
[ 1.947149] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: da18f800
[ 1.947149] ESI: 00000000 EDI: da18f800 EBP: c005de24 ESP: c005de1c
[ 1.947149] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210246
[ 1.947149] CR0: 80050033 CR2: 00000030 CR3: 01da4000 CR4: 003406f0
[ 1.947149] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 1.947149] DR6: fffe0ff0 DR7: 00000400
[ 1.947149] Call Trace:
[ 1.947149] blk_mq_debugfs_register_sched_hctx+0x2f/0x40
[ 1.947149] blk_mq_init_sched+0x156/0x1c0
[ 1.947149] elevator_init_mq+0x4b/0x80
[ 1.947149] blk_mq_init_allocated_queue+0x409/0x460
[ 1.947149] blk_mq_init_queue+0x23/0x60
[ 1.947149] blk_mq_init_sq_queue+0x77/0x90
[ 1.947149] floppy_async_init+0xc0/0xd2c
[ 1.947149] ? __lock_acquire+0x35/0x860
[ 1.947149] async_run_entry_fn+0x2e/0xf0
[ 1.947149] process_one_work+0x195/0x3c0
[ 1.947149] ? process_one_work+0x176/0x3c0
[ 1.947149] worker_thread+0x39/0x3d0
[ 1.947149] kthread+0xda/0x110
[ 1.947149] ? process_one_work+0x3c0/0x3c0
[ 1.947149] ? kthread_park+0xa0/0xa0
[ 1.947149] ret_from_fork+0x19/0x30
[ 1.947149] Modules linked in:
[ 1.947149] CR2: 0000000000000030
[ 1.947149] ---[ end trace 34fc82d8056f573a ]---
[ 1.947150] BUG: unable to handle kernel NULL pointer dereference at 00000030
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 843a72ff4a339fbdf5214ebefd2cf22bbf0f7dbf 8fe28cb58bcb235034b64cbbb7550a8a43fd88be --
git bisect good daec9f5c6de4b163fc010ade3230edde810b9d9c # 15:59 G 11 0 0 0 Merge 'jwboyer-fedora/rawhide' into devel-catchup-201901050624
git bisect bad dd59e0f7ad3efdf4c56e7480eb816050e9c07dcb # 16:31 B 0 11 26 0 Merge 'driver-core/debugfs_cleanup' into devel-catchup-201901050624
git bisect good 119e87281a9a3e9f436f7e2cfdb7212e455c1da3 # 17:04 G 11 0 0 0 Merge 'vfs/for-linus' into devel-catchup-201901050624
git bisect good a6c0830c9aefafdad034703fb270f62d8af17a07 # 17:39 G 11 0 0 0 Merge 'arm-platforms/arm64/tsclock' into devel-catchup-201901050624
git bisect good 2817db74645cc634530721599c409663605e44da # 18:29 G 11 0 0 0 Merge 'slave-dma/topic/stm' into devel-catchup-201901050624
git bisect good 22089f8f04a83e7ef2891973f14ed7512c1de53c # 19:05 G 11 0 0 0 Merge 'arm-platforms/kvm-arm64/ttl' into devel-catchup-201901050624
git bisect good e3297237151d85ab53167da54b22d29335f38249 # 19:32 G 11 0 0 0 ti: wl12xx: no need to check return value of debugfs_create functions
git bisect good 47cbfc965abb85ba72b564f4986c4c23e5ba9fd2 # 20:04 G 11 0 0 0 irq: no need to check return value of debugfs_create functions
git bisect good 215e489e376189297a9f44e2a0f5f68c8f40f079 # 20:42 G 11 0 0 0 l2tp: fix changelog
git bisect bad cb465aecf2505914b07e0791e3b9805de1370829 # 21:12 B 0 11 26 0 pstore: fix changelog
git bisect bad 047fb56f7ecf53620d6e93fbcc8ca9166108d14c # 21:43 B 0 11 26 0 blk-mq: fix changelog
git bisect good 3295bdd9a21bcc9eca441c53d34b2fb787c1c063 # 22:21 G 10 0 0 0 mac80211: fix changelog
git bisect good 464573328ebe2c48c793cf88d0c6d968baf08902 # 23:01 G 10 0 0 0 wireless: fix changelog
# first bad commit: [047fb56f7ecf53620d6e93fbcc8ca9166108d14c] blk-mq: fix changelog
git bisect good 464573328ebe2c48c793cf88d0c6d968baf08902 # 23:05 G 30 0 0 0 wireless: fix changelog
# extra tests with debug options
git bisect bad 047fb56f7ecf53620d6e93fbcc8ca9166108d14c # 23:34 B 0 8 23 0 blk-mq: fix changelog
# extra tests on HEAD of linux-devel/devel-catchup-201901050624
git bisect bad 843a72ff4a339fbdf5214ebefd2cf22bbf0f7dbf # 23:34 B 0 19 37 0 0day head guard for 'devel-catchup-201901050624'
# extra tests on tree/branch driver-core/debugfs_cleanup
git bisect bad 24aeb03f708578f6eaf9b7b5a8d02bc6cbde1435 # 00:05 B 0 5 20 0 lib: WIP, break up
# extra tests with first bad commit reverted
git bisect good b508ffb9895ea56b727d3a16a715f723cf25c278 # 01:18 G 11 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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