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Date: Tue, 3 Jan 2017 16:04:12 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Harry Wentland <harry.wentland@....com>,
Sean Paul <seanpaul@...omium.org>,
Daniel Vetter <daniel.vetter@...el.com>,
LKML <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [lkp-developer] [drm] 2ab8c5f8c0:
WARNING:at_drivers/gpu/drm/drm_mode_config.c:#drm_mode_config_cleanup[drm]
FYI, we noticed the following commit:
commit: 2ab8c5f8c0358010a19e82656fa4826a6a51d1e0 ("drm: Clean up connectors by unreferencing them")
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu IvyBridge -smp 2 -m 1G
caused below changes:
+----------------------------------------------------------------------------+------------+------------+
| | c36a3254f7 | 2ab8c5f8c0 |
+----------------------------------------------------------------------------+------------+------------+
| boot_successes | 0 | 0 |
| boot_failures | 12 | 12 |
| WARNING:at_arch/x86/mm/dump_pagetables.c:#note_page | 12 | 12 |
| calltrace:mark_rodata_ro | 12 | 12 |
| WARNING:at_fs/sysfs/dir.c:#sysfs_warn_dup | 10 | 7 |
| calltrace:parport_pc_init | 9 | 7 |
| calltrace:SyS_finit_module | 10 | 8 |
| WARNING:at_lib/kobject.c:#kobject_add_internal | 10 | 7 |
| calltrace:ppdev_init | 1 | |
| WARNING:at_drivers/gpu/drm/drm_mode_config.c:#drm_mode_config_cleanup[drm] | 0 | 8 |
| calltrace:bochs_init | 0 | 8 |
+----------------------------------------------------------------------------+------------+------------+
[ 7.358425] [drm] Initialized bochs-drm 1.0.0 20130925 for 0000:00:02.0 on minor 0
[ 7.363088] Console: switching to colour VGA+ 80x25
[ 7.383045] ------------[ cut here ]------------
[ 7.383866] WARNING: CPU: 0 PID: 187 at drivers/gpu/drm/drm_mode_config.c:424 drm_mode_config_cleanup+0x99/0x20c [drm]
[ 7.385844] Modules linked in: ppdev(+) intel_rapl(-) crct10dif_pclmul crc32c_intel bochs_drm(+) ttm fbcon bitblit fbcon_rotate fbcon_ccw fbcon_ud fbcon_cw softcursor tileblit evbug drm_kms_helper serio_raw virtio_pci drm cfbfillrect cfbimgblt cfbcopyarea fb_sys_fops syscopyarea sysfillrect sysimgblt fb fbdev parport_pc(+) acpi_cpufreq processor button
[ 7.392955] CPU: 0 PID: 187 Comm: systemd-udevd Tainted: G W 4.9.0-rc8-01683-g2ab8c5f #1
[ 7.394825] parport_pc 00:04: reported by Plug and Play ACPI
[ 7.394980] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE,EPP]
[ 7.396233] ppdev: user-space parallel port driver
[ 7.399863] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 7.401462] ffffc90000acfa60 ffffffff812c2c74 ffffc90000acfaa0 ffffffff8106ffd7
[ 7.403032] 000001a800acf9f8 ffff88003e47e000 ffff88003e47e850 ffff88003e47e858
[ 7.404576] 000000000000000a 0000000000000001 ffffc90000acfab0 ffffffff8107009f
[ 7.406142] Call Trace:
[ 7.407452] [<ffffffff812c2c74>] dump_stack+0x19/0x1b
[ 7.408320] [<ffffffff8106ffd7>] __warn+0xc3/0xde
[ 7.409126] [<ffffffff8107009f>] warn_slowpath_null+0x18/0x1a
[ 7.410159] [<ffffffffa008a3ad>] drm_mode_config_cleanup+0x99/0x20c [drm]
[ 7.411236] [<ffffffffa0157f94>] bochs_kms_fini+0x1a/0x24 [bochs_drm]
[ 7.412258] [<ffffffffa01570b9>] bochs_unload+0x1e/0x46 [bochs_drm]
[ 7.413261] [<ffffffffa0076104>] drm_dev_unregister+0x38/0xb0 [drm]
[ 7.414339] [<ffffffffa0076448>] drm_put_dev+0x48/0x53 [drm]
[ 7.415283] [<ffffffffa0157099>] bochs_pci_remove+0x10/0x12 [bochs_drm]
[ 7.416334] [<ffffffff8130ccc6>] pci_device_remove+0x46/0x8f
[ 7.417261] [<ffffffff813baf48>] driver_probe_device+0x1d8/0x431
[ 7.418310] [<ffffffff813bb211>] __driver_attach+0x70/0xcd
[ 7.419229] [<ffffffff813bb1a1>] ? driver_probe_device+0x431/0x431
[ 7.420223] [<ffffffff813b91ef>] bus_for_each_dev+0x6a/0x82
[ 7.421143] [<ffffffff813ba864>] driver_attach+0x19/0x1b
[ 7.422097] [<ffffffff813ba442>] bus_add_driver+0xf9/0x241
[ 7.423010] [<ffffffff813bbb27>] driver_register+0x89/0xc5
[ 7.423915] [<ffffffff8130be70>] __pci_register_driver+0x5b/0x5e
[ 7.424881] [<ffffffffa00779e2>] drm_pci_init+0x4e/0xcf [drm]
[ 7.425926] [<ffffffffa015c000>] ? 0xffffffffa015c000
[ 7.426771] [<ffffffffa015c017>] bochs_init+0x17/0x19 [bochs_drm]
[ 7.427747] [<ffffffff8100044f>] do_one_initcall+0x8c/0x118
[ 7.428669] [<ffffffff81146d79>] ? kmem_cache_alloc_trace+0xb8/0xc8
[ 7.429750] [<ffffffff81110729>] do_init_module+0x59/0x1ca
[ 7.430664] [<ffffffff810c61c7>] load_module+0x1117/0x1520
[ 7.431561] [<ffffffff81154e54>] ? kernel_read_file+0x107/0x166
[ 7.432521] [<ffffffff810c67b3>] SYSC_finit_module+0x88/0xb7
[ 7.433442] [<ffffffff810c67b3>] ? SYSC_finit_module+0x88/0xb7
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-rc8-01683-g2ab8c5f" of type "text/plain" (97580 bytes)
View attachment "job-script" of type "text/plain" (4211 bytes)
Download attachment "dmesg.xz" of type "application/octet-stream" (13604 bytes)
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