linux-kernel - [LKP] [blkcg] 22f657e287: general_protection

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Date:   Tue, 11 Sep 2018 10:37:06 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Dennis Zhou <dennisszhou@...il.com>
Cc:     Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Josef Bacik <josef@...icpanda.com>, kernel-team@...com,
        linux-block@...r.kernel.org, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Dennis Zhou (Facebook)" <dennisszhou@...il.com>, lkp@...org
Subject: [LKP] [blkcg]  22f657e287: general_protection_fault:#[##]

FYI, we noticed the following commit (built with gcc-7):

commit: 22f657e2876612270ad346b7f5ba2493ba434d41 ("[PATCH 12/15] blkcg: cleanup and make blk_get_rl use blkg_lookup_create")
url: https://github.com/0day-ci/linux/commits/Dennis-Zhou/blkcg-ref-count-refactor-cleanup-blkcg-avg_lat/20180831-161742
base: https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-next

in testcase: trinity
with following parameters:

	runtime: 300s

test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/


on test machine: qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -smp 2 -m 512M

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+------------------------------------------------------------------+------------+------------+
|                                                                  | f743a58719 | 22f657e287 |
+------------------------------------------------------------------+------------+------------+
| boot_successes                                                   | 3          | 0          |
| boot_failures                                                    | 10         | 16         |
| invoked_oom-killer:gfp_mask=0x                                   | 6          | 6          |
| Mem-Info                                                         | 6          | 6          |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 6          | 6          |
| IP-Config:Auto-configuration_of_network_failed                   | 4          |            |
| general_protection_fault:#[##]                                   | 0          | 10         |
| RIP:get_request                                                  | 0          | 10         |
| Kernel_panic-not_syncing:Fatal_exception                         | 0          | 10         |
+------------------------------------------------------------------+------------+------------+



[   93.607840] SCSI Media Changer driver v0.25 
[   93.667470] scsi host0: scsi_debug: version 0188 [20180128]
[   93.667470]   dev_size_mb=8, opts=0x0, submit_queues=1, statistics=0
[   93.756552] kasan: CONFIG_KASAN_INLINE enabled
[   93.766196] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   93.766196] general protection fault: 0000 [#1] PREEMPT KASAN
[   93.766196] CPU: 0 PID: 27 Comm: kworker/u2:1 Not tainted 4.19.0-rc1-00174-g22f657e #1
[   93.766196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[   93.766196] Workqueue: events_unbound async_run_entry_fn
[   93.766196] RIP: 0010:get_request+0x11f/0xe24
[   93.766196] Code: 83 b8 f0 00 00 00 00 74 02 0f 0b e8 6b 78 46 ff 48 8b 44 24 10 48 8d 78 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 74 05 e8 6d 16 63 ff 48 8b 44 24 10 48 bd 00 00 00 00
[   93.766196] RSP: 0000:ffff880016c07850 EFLAGS: 00010006
[   93.766196] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000008
[   93.766196] RDX: 000000000000000c RSI: 0000000000000020 RDI: 0000000000000060
[   93.766196] RBP: ffff88001463b390 R08: 0000000000600000 R09: ffffed0002d80f0f
[   93.766196] R10: 0000000000000000 R11: ffff880016c07877 R12: 0000000000600000
[   93.766196] R13: 0000000000000000 R14: 0000000000000020 R15: ffff880014639540
[   93.766196] FS:  0000000000000000(0000) GS:ffffffff8427e000(0000) knlGS:0000000000000000
[   93.766196] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.766196] CR2: 0000000000000000 CR3: 000000000422c001 CR4: 00000000000206b0
[   93.766196] Call Trace:
[   93.766196]  ? blk_rq_init+0x27c/0x27c
[   93.766196]  ? blk_exit_rl+0x55/0x55
[   93.766196]  ? __wake_up_common_lock+0x140/0x140
[   93.766196]  ? tracer_preempt_on+0x16/0x25
[   93.766196]  ? preempt_count_sub+0x12d/0x136
[   93.766196]  ? task_unlock+0xa/0x1a
[   93.766196]  ? create_task_io_context+0x2c7/0x2cf
[   93.766196]  blk_get_request+0x14d/0x277
[   93.766196]  __scsi_execute+0x67/0x466
[   93.766196]  scsi_probe_and_add_lun+0x399/0x1d14
[   93.766196]  ? rpm_resume+0xad5/0xb05
[   93.766196]  ? scsi_sanitize_inquiry_string+0x77/0x77
[   93.766196]  ? rpm_put_suppliers+0x10e/0x10e
[   93.766196]  ? scsi_target_reap_ref_release+0x6a/0x6a
[   93.766196]  ? tracer_preempt_on+0x16/0x25
[   93.766196]  ? preempt_count_sub+0x12d/0x136
[   93.766196]  __scsi_scan_target+0x130/0x6af
[   93.766196]  ? __free_pages+0x3c/0x3c
[   93.766196]  ? scsi_probe_and_add_lun+0x1d14/0x1d14
[   93.766196]  ? rpm_resume+0xad5/0xb05
[   93.766196]  ? rpm_put_suppliers+0x10e/0x10e
[   93.766196]  ? __switch_to_asm+0x30/0x60
[   93.766196]  ? ___might_sleep+0xac/0x33e
[   93.766196]  scsi_scan_channel+0xcb/0xe8
[   93.766196]  scsi_scan_host_selected+0x1ca/0x201
[   93.766196]  ? do_scsi_scan_host+0x18a/0x18a
[   93.766196]  do_scan_async+0x3e/0x2ff
[   93.766196]  ? do_scsi_scan_host+0x18a/0x18a
[   93.766196]  async_run_entry_fn+0x1c5/0x33c
[   93.766196]  process_one_work+0x4c0/0x6cd
[   93.766196]  ? preempt_count_sub+0x12d/0x136
[   93.766196]  worker_thread+0x4b3/0x610
[   93.766196]  ? __kthread_parkme+0x9f/0x148
[   93.766196]  kthread+0x2c5/0x2d4
[   93.766196]  ? process_scheduled_works+0x6d/0x6d
[   93.766196]  ? __kthread_cancel_work+0x16b/0x16b
[   93.766196]  ret_from_fork+0x35/0x40
[   93.766196] ---[ end trace a8869917661828b0 ]---
[   93.766196] RIP: 0010:get_request+0x11f/0xe24
[   93.766196] Code: 83 b8 f0 00 00 00 00 74 02 0f 0b e8 6b 78 46 ff 48 8b 44 24 10 48 8d 78 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 74 05 e8 6d 16 63 ff 48 8b 44 24 10 48 bd 00 00 00 00
[   93.766196] RSP: 0000:ffff880016c07850 EFLAGS: 00010006
[   93.766196] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000008
[   93.766196] RDX: 000000000000000c RSI: 0000000000000020 RDI: 0000000000000060
[   93.766196] RBP: ffff88001463b390 R08: 0000000000600000 R09: ffffed0002d80f0f
[   93.766196] R10: 0000000000000000 R11: ffff880016c07877 R12: 0000000000600000
[   93.766196] R13: 0000000000000000 R14: 0000000000000020 R15: ffff880014639540
[   93.766196] FS:  0000000000000000(0000) GS:ffffffff8427e000(0000) knlGS:0000000000000000
[   93.766196] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.766196] CR2: 0000000000000000 CR3: 000000000422c001 CR4: 00000000000206b0
[   93.766196] Kernel panic - not syncing: Fatal exception
[   93.766196] Kernel Offset: disabled

Elapsed time: 100

#!/bin/bash


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
Rong, Chen

View attachment "config-4.19.0-rc1-00174-g22f657e" of type "text/plain" (114953 bytes)

View attachment "job-script" of type "text/plain" (3755 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (10844 bytes)