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Message-ID: <5c534c93.RCCiDZ7F62ztSDQu%lkp@intel.com>
Date: Fri, 01 Feb 2019 03:29:23 +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: c438cfd46e ("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 c438cfd46e37a6dd9e370219a6f0d397cc3c1a36
Author: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
AuthorDate: Fri Jan 4 14:06:22 2019 +0100
Commit: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CommitDate: Thu Jan 31 14:18:25 2019 +0100
blk-mq: fix changelog
ddd7d0ff2d wireless: fix changelog
c438cfd46e blk-mq: fix changelog
31b092d47f lib: WIP, break up
+------------------------------------------+------------+------------+------------+
| | ddd7d0ff2d | c438cfd46e | 31b092d47f |
+------------------------------------------+------------+------------+------------+
| boot_successes | 37 | 0 | 0 |
| boot_failures | 0 | 26 | 26 |
| BUG:unable_to_handle_kernel | 0 | 26 | 26 |
| Oops:#[##] | 0 | 26 | 26 |
| EIP:debugfs_create_files | 0 | 26 | 26 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 26 | 26 |
+------------------------------------------+------------+------------+------------+
[ 7.740649] igt_debug 0x0000000000000a00-0x0000000000000e00: 1024: used
[ 7.741350] igt_debug 0x0000000000000e00-0x0000000000001000: 512: free
[ 7.742149] igt_debug total: 4096, used 2048 free 2048
[ 42.726577] [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
[ 42.728241] Floppy drive(s): fd0 is 2.88M AMI BIOS
[ 42.729334] BUG: unable to handle kernel NULL pointer dereference at 00000000
[ 42.729735] #PF error: [normal kernel read fault]
[ 42.729735] *pde = 00000000
[ 42.729735] Oops: 0000 [#1]
[ 42.729735] CPU: 0 PID: 1 Comm: swapper Not tainted 5.0.0-rc2-00115-gc438cfd #113
[ 42.729735] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 42.729735] EIP: debugfs_create_files+0x6b/0xa0
[ 42.729735] Code: 00 00 00 00 0f 97 c0 31 c9 89 c7 0f b6 d0 b8 68 ab 7b 82 e8 57 6d be ff 89 f8 84 c0 75 38 8b 46 30 8b 7d f0 89 b8 fc 01 00 00 <8b> 03 85 c0 74 26 8d b4 26 00 00 00 00 0f b7 53 04 89 1c 24 89 f1
[ 42.729735] EAX: 9efb5000 EBX: 00000000 ECX: 00000000 EDX: 00000000
[ 42.729735] ESI: 9efb3840 EDI: 9d6cf800 EBP: 80243e3c ESP: 80243e24
[ 42.729735] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00210246
[ 42.729735] CR0: 80050033 CR2: 00000000 CR3: 02924000 CR4: 001406d0
[ 42.729735] Call Trace:
[ 42.729735] blk_mq_debugfs_register_sched_hctx+0x34/0x40
[ 42.729735] blk_mq_debugfs_register+0xb1/0xc0
[ 42.729735] blk_register_queue+0x108/0x230
[ 42.729735] __device_add_disk+0x44f/0x640
[ 42.729735] device_add_disk+0x17/0x20
[ 42.729735] loop_add+0x217/0x2c0
[ 42.729735] loop_init+0xf9/0x11a
[ 42.729735] ? floppy_async_init+0xd4c/0xd4c
[ 42.729735] do_one_initcall+0xdd/0x25d
[ 42.729735] kernel_init_freeable+0x25a/0x2d7
[ 42.729735] ? rest_init+0x140/0x140
[ 42.729735] kernel_init+0x10/0x100
[ 42.729735] ? schedule_tail_wrapper+0x9/0x10
[ 42.729735] ret_from_fork+0x19/0x30
[ 42.729735] CR2: 0000000000000000
[ 42.729735] _warn_unseeded_randomness: 35 callbacks suppressed
[ 42.729735] random: get_random_bytes called from init_oops_id+0x3f/0x50 with crng_init=1
[ 42.729735] ---[ end trace 25be250042fb0fd4 ]---
[ 42.729735] EIP: debugfs_create_files+0x6b/0xa0
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 0e9ac1e5b38fa1032c8809b7f375c5f20aa8c2be f17b5f06cb92ef2250513a1e154c47b78df07d40 --
git bisect good f095dea55a4ac7fdb83f505523ad417274e54192 # 01:00 G 10 0 0 0 Merge 'ulf.hansson-mmc/next' into devel-catchup-201901312352
git bisect good f1ac64a048ea54cd0bfa9d1d455056c135e3e597 # 01:08 G 11 0 0 0 Merge 'alaahl/for-linust' into devel-catchup-201901312352
git bisect bad 4f28883ea4af13b4d15f7ae2f7efb5fa81cc4f84 # 01:14 B 0 9 34 11 Merge 'driver-core/debugfs_cleanup' into devel-catchup-201901312352
git bisect good 52c070b7c8809576d3065d4b6a4cf1154d7acde2 # 01:33 G 10 0 0 0 cw1200: no need to check return value of debugfs_create functions
git bisect good 3000a51bc760ad362eeab65de07a92c47b2353eb # 01:43 G 10 0 0 0 f2fs: no need to check return value of debugfs_create functions
git bisect good 50b82e5dd6c2fad0af36a80baff41b37c18e091b # 02:00 G 11 0 0 0 xen-netback: fix changelog
git bisect bad 6a37bbef02b8607940a432c864e3f635293cb1e3 # 02:04 B 0 2 16 0 pstore: fix changelog
git bisect good c3cbe3160fcb8ea6dc6a6d2939af4f2bf05c11a2 # 02:29 G 11 0 0 0 sunrpc: fix changelog
git bisect good ddd7d0ff2d7b4f80e2c4b54718f66c5601fd25c1 # 02:35 G 11 0 0 0 wireless: fix changelog
git bisect bad c438cfd46e37a6dd9e370219a6f0d397cc3c1a36 # 02:39 B 0 1 15 0 blk-mq: fix changelog
# first bad commit: [c438cfd46e37a6dd9e370219a6f0d397cc3c1a36] blk-mq: fix changelog
git bisect good ddd7d0ff2d7b4f80e2c4b54718f66c5601fd25c1 # 02:48 G 30 0 0 0 wireless: fix changelog
# extra tests with debug options
git bisect bad c438cfd46e37a6dd9e370219a6f0d397cc3c1a36 # 02:53 B 0 2 16 0 blk-mq: fix changelog
# extra tests on HEAD of linux-devel/devel-catchup-201901312352
git bisect bad 0e9ac1e5b38fa1032c8809b7f375c5f20aa8c2be # 02:58 B 0 17 34 0 0day head guard for 'devel-catchup-201901312352'
# extra tests on tree/branch driver-core/debugfs_cleanup
git bisect bad 31b092d47f0a16ce1ece9593a387a883d64acab8 # 03:03 B 0 1 15 0 lib: WIP, break up
# extra tests with first bad commit reverted
git bisect good 29828fbf7aa1702254ce9767e2943ac944784316 # 03:28 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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