linux-kernel - [lkp-developer] [drm] 75f6dfe3e6: BUG:unable_to_handle

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Date:   Wed, 4 Jan 2017 08:45:04 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Gabriel Krisman Bertazi <krisman@...labora.co.uk>
Cc:     Daniel Vetter <daniel.vetter@...ll.ch>,
        LKML <linux-kernel@...r.kernel.org>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        lkp@...org
Subject: [lkp-developer] [drm]  75f6dfe3e6: BUG:unable_to_handle_kernel


FYI, we noticed the following commit:

commit: 75f6dfe3e652e1adef8cc1b073c89f3e22103a8f ("drm: Deduplicate driver initialization message")
git://anongit.freedesktop.org/drm-intel drm-intel-nightly

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 -m 320M

caused below changes:


+------------------------------------------+------------+------------+
|                                          | e82dfa00da | 75f6dfe3e6 |
+------------------------------------------+------------+------------+
| boot_successes                           | 8          | 0          |
| boot_failures                            | 0          | 8          |
| BUG:unable_to_handle_kernel              | 0          | 8          |
| Oops:#[##]                               | 0          | 8          |
| EIP_is_at_drm_dev_register               | 0          | 8          |
| calltrace:vgem_init                      | 0          | 8          |
| Kernel_panic-not_syncing:Fatal_exception | 0          | 8          |
+------------------------------------------+------------+------------+



[    1.608985] mwave: mwavedd::mwave_init: Error: Failed to initialize
[    1.609295] Hangcheck: starting hangcheck timer 0.9.1 (tick is 180 seconds, margin is 60 seconds).
[    1.609913] [drm] radeon kernel modesetting enabled.
[    1.610407] BUG: unable to handle kernel NULL pointer dereference at 0000002c
[    1.610833] IP: [<8143c0ba>] drm_dev_register+0xe9/0x173
[    1.611131] *pdpt = 0000000000000000 *pde = f000ff53f000ff53 
[    1.611427] 
[    1.611513] Oops: 0000 [#1]
[    1.611656] CPU: 0 PID: 1 Comm: swapper Not tainted 4.9.0-rc8-01743-g75f6dfe #354
[    1.612026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[    1.612523] task: 9342d000 task.stack: 9343e000
[    1.612749] EIP: 0060:[<8143c0ba>] EFLAGS: 00210246 CPU: 0
[    1.613023] EIP is at drm_dev_register+0xe9/0x173
[    1.613257] EAX: 900a3400 EBX: 900a5000 ECX: 00000000 EDX: 00000000
[    1.613617] ESI: 820233c0 EDI: 00000000 EBP: 9343ff10 ESP: 9343fef8
[    1.613989]  DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
[    1.614278] CR0: 80050033 CR2: 0000002c CR3: 0217e000 CR4: 000006b0
[    1.614621] Stack:
[    1.614725]  00000000 00000000 8143c57d dd700876 82100b64 000003a3 9343ff20 82100ba4
[    1.615162]  34c27b4d 82100b64 9343ff80 820b7212 939b87ac 81e79ff0 00000000 9343ff00
[    1.615595]  81049d1c 00000000 81e79ff0 00060006 81e75748 000003a3 939b87ad 00000200
[    1.616052] Call Trace:
[    1.616190]  [<8143c57d>] ? drm_dev_alloc+0x28/0x43
[    1.616435]  [<82100b64>] ? vmwgfx_init+0x65/0x65
[    1.616669]  [<82100ba4>] vgem_init+0x40/0x74
[    1.616905]  [<82100b64>] ? vmwgfx_init+0x65/0x65
[    1.617148]  [<820b7212>] do_one_initcall+0x9e/0x17a
[    1.617411]  [<81049d1c>] ? parse_args+0x1bb/0x27e
[    1.617682]  [<820b7452>] ? kernel_init_freeable+0x164/0x266
[    1.617997]  [<820b7481>] kernel_init_freeable+0x193/0x266
[    1.618287]  [<8198706a>] ? rest_init+0xa2/0xa2
[    1.618521]  [<81987072>] kernel_init+0x8/0xcb
[    1.618758]  [<8198bc77>] ret_from_fork+0x1b/0x28
[    1.618994] Code: 68 eb aa 8b 55 e8 89 d8 ff d1 85 c0 89 c7 75 59 8b 43 14 f6 80 dd 00 00 00 20 74 07 89 d8 e8 b1 10 01 00 8b 43 20 8b 53 10 8b 08 <8b> 42 2c 85 c0 75 03 8b 42 08 51 50 ff b6 d8 00 00 00 ff b6 cc
[    1.620399] EIP: [<8143c0ba>] 
[    1.620566] drm_dev_register+0xe9/0x173
[    1.620781]  SS:ESP 0068:9343fef8
[    1.620975] CR2: 000000000000002c
[    1.621149] ---[ end trace 9d22d41231e36593 ]---
[    1.621389] Kernel panic - not syncing: Fatal exception
[    1.621680] Kernel Offset: disabled

Elapsed time: 10


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong

View attachment "config-4.9.0-rc8-01743-g75f6dfe" of type "text/plain" (91855 bytes)

View attachment "job-script" of type "text/plain" (3513 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (10124 bytes)