linux-kernel - [LKP] [bochs] df2052cc92: WARNING:at_drivers/gpu/drm/drm_mode_config.c:#drm_mode_config

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Message-ID: <20181221083226.GI23332@shao2-debian>
Date:   Fri, 21 Dec 2018 16:32:26 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Peter Wu <peter@...ensteyn.nl>
Cc:     Gerd Hoffmann <kraxel@...hat.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>, lkp@...org
Subject: [LKP] [bochs] df2052cc92:
 WARNING:at_drivers/gpu/drm/drm_mode_config.c:#drm_mode_config_cleanup

FYI, we noticed the following commit (built with gcc-4.9):

commit: df2052cc922136e98a5c8d9730f6a4fd0a958c94 ("bochs: convert to drm_fb_helper_fbdev_setup/teardown")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

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 SandyBridge -smp 2 -m 768M

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


+-----------------------------------------------------------------------+------------+------------+
|                                                                       | 70c0ef7bd3 | df2052cc92 |
+-----------------------------------------------------------------------+------------+------------+
| boot_successes                                                        | 0          | 0          |
| boot_failures                                                         | 4          | 4          |
| WARNING:at_block/blk.h:#blk_register_queue                            | 4          | 4          |
| EIP:blk_register_queue                                                | 4          | 4          |
| WARNING:at_arch/x86/mm/dump_pagetables.c:#note_page                   | 4          | 4          |
| EIP:note_page                                                         | 4          | 4          |
| WARNING:at_drivers/gpu/drm/drm_mode_config.c:#drm_mode_config_cleanup | 0          | 4          |
| EIP:drm_mode_config_cleanup                                           | 0          | 4          |
+-----------------------------------------------------------------------+------------+------------+



[  487.591733] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_mode_config.c:478 drm_mode_config_cleanup+0x270/0x290
[  487.599141] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G                T 4.19.0-rc1-00164-gdf2052c #1
[  487.599141] EIP: drm_mode_config_cleanup+0x270/0x290
[  487.599141] Code: 26 00 ff 70 28 68 37 44 91 42 e8 3b f2 ff ff 58 5a 8d 45 dc e8 f1 98 ff ff 85 c0 75 e5 8d 45 dc e8 75 99 ff ff e9 43 fe ff ff <0f> 0b e9 15 ff ff ff 0f 0b 8d 65 f4 5b 5e 5f 5d c3 90 90 90 90 90
[  487.599141] EAX: 6b879614 EBX: 6ee7970c ECX: 6ee795c8 EDX: 6ee795c8
[  487.599141] ESI: 6ee79724 EDI: 6ee79178 EBP: 40125e20 ESP: 40125df8
[  487.599141] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210206
[  487.599141] CR0: 80050033 CR2: 00000000 CR3: 02d44000 CR4: 000006b0
[  487.599141] Call Trace:
[  487.599141]  ? debugfs_remove_recursive+0x15a/0x170
[  487.599141]  ? bochs_kms_fini+0x1e/0x30
[  487.599141]  ? bochs_unload+0x18/0x40
[  487.599141]  ? drm_dev_unregister+0x3a/0xd0
[  487.599141]  ? drm_put_dev+0x22/0x50
[  487.599141]  ? bochs_pci_remove+0xe/0x10
[  487.599141]  ? pci_device_remove+0x1c/0x50
[  487.599141]  ? really_probe+0x9a/0x2f0
[  487.599141]  ? driver_probe_device+0x101/0x120
[  487.599141]  ? __driver_attach+0xa1/0xb0
[  487.599141]  ? driver_probe_device+0x120/0x120
[  487.599141]  ? bus_for_each_dev+0x53/0x90
[  487.599141]  ? driver_attach+0x14/0x20
[  487.599141]  ? driver_probe_device+0x120/0x120
[  487.599141]  ? bus_add_driver+0x177/0x1f0
[  487.599141]  ? qxl_init+0x61/0x61
[  487.599141]  ? driver_register+0x51/0xe0
[  487.599141]  ? qxl_init+0x61/0x61
[  487.599141]  ? __pci_register_driver+0x4b/0x50
[  487.599141]  ? bochs_init+0x3e/0x57
[  487.599141]  ? do_one_initcall+0x83/0x1c7
[  487.599141]  ? smp_apic_timer_interrupt+0x48/0x80
[  487.599141]  ? apic_timer_interrupt+0xcb/0xd0
[  487.599141]  ? kernel_init_freeable+0x129/0x204
[  487.599141]  ? rest_init+0xe0/0xe0
[  487.599141]  ? kernel_init+0x8/0xf0
[  487.599141]  ? ret_from_fork+0x19/0x30
[  487.599141] ---[ end trace 9072929f8a181f7a ]---


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-rc1-00164-gdf2052c" of type "text/plain" (118428 bytes)

View attachment "job-script" of type "text/plain" (4110 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (24960 bytes)