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Date: Wed, 2 Dec 2020 10:29:36 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Thomas Zimmermann <tzimmermann@...e.de>
Cc: Sam Ravnborg <sam@...nborg.org>,
Maxime Ripard <mripard@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
Linux Memory Management List <linux-mm@...ck.org>,
lkp@...ts.01.org, lkp@...el.com
Subject: [drm/fb] 1d46491d4a:
WARNING:at_drivers/gpu/drm/drm_fb_helper.c:#drm_fb_helper_damage_work[drm_kms_helper]
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 1d46491d4a08d7ee657e09808f87d169444a2652 ("drm/fb-helper: Move damage blit code and its setup into separate routine")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: locktorture
version:
with following parameters:
runtime: 300s
test: cpuhotplug
test-description: This torture test consists of creating a number of kernel threads which acquire the lock and hold it for specific amount of time, thus simulating different critical region behaviors.
test-url: https://www.kernel.org/doc/Documentation/locking/locktorture.txt
on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------------------------------------------------+------------+------------+
| | fd2d856538 | 1d46491d4a |
+---------------------------------------------------------------------------------------+------------+------------+
| WARNING:at_drivers/gpu/drm/drm_fb_helper.c:#drm_fb_helper_damage_work[drm_kms_helper] | 0 | 26 |
| EIP:drm_fb_helper_damage_work | 0 | 26 |
+---------------------------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 28.261007] WARNING: CPU: 0 PID: 122 at drivers/gpu/drm/drm_fb_helper.c:434 drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
[ 28.263802] Modules linked in: locktorture(E) torture(E) mousedev(E) ppdev(E) psmouse(E) crc32c_intel(E) input_leds(E) bochs_drm(E) drm_vram_helper(E) drm_ttm_helper(E) ttm(E) drm_kms_helper(E) parport_pc(E) rtc_cmos(E) parport(E) drm(E) evbug(E) i6300esb(E) i2c_piix4(E) autofs4(E)
[ 28.271897] CPU: 0 PID: 122 Comm: kworker/0:2 Tainted: G E 5.10.0-rc3-01102-g1d46491d4a08 #1
[ 28.273904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 28.275819] Workqueue: events drm_fb_helper_damage_work [drm_kms_helper]
[ 28.279884] EIP: drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
[ 28.281467] Code: 47 10 8b 58 2c 85 db 0f 84 bc 01 00 00 e8 1f f0 da f4 89 74 24 0c 89 5c 24 08 89 44 24 04 c7 04 24 98 c1 40 df e8 f7 50 1d f5 <0f> 0b 31 c9 c7 04 24 01 00 00 00 ba 01 00 00 00 b8 3c e8 40 df e8
[ 28.285055] EAX: 00000036 EBX: c1c91420 ECX: 00000000 EDX: 00000000
[ 28.289443] ESI: fffffff4 EDI: d2014000 EBP: d2c0dee4 ESP: d2c0de9c
[ 28.291058] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010292
[ 28.292717] CR0: 80050033 CR2: b727a028 CR3: 12141000 CR4: 00040690
[ 28.294316] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 28.295915] DR6: fffe0ff0 DR7: 00000400
[ 28.300768] Call Trace:
[ 28.302117] process_one_work+0x31b/0x7b0
[ 28.303532] ? process_one_work+0x272/0x7b0
[ 28.304976] worker_thread+0x29a/0x5d0
[ 28.308712] ? process_one_work+0x7b0/0x7b0
[ 28.310129] kthread+0x181/0x1a0
[ 28.311464] ? process_one_work+0x7b0/0x7b0
[ 28.312878] ? kthread_create_worker_on_cpu+0x30/0x30
[ 28.314318] ret_from_fork+0x1c/0x28
[ 28.315645] CPU: 0 PID: 122 Comm: kworker/0:2 Tainted: G E 5.10.0-rc3-01102-g1d46491d4a08 #1
[ 28.317414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 28.319096] Workqueue: events drm_fb_helper_damage_work [drm_kms_helper]
[ 28.320674] Call Trace:
[ 28.321947] dump_stack+0x6d/0x8b
[ 28.323278] __warn.cold+0x24/0x49
[ 28.324639] ? drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
[ 28.326167] ? drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
[ 28.327670] ? drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
[ 28.329165] report_bug+0xb0/0xf0
[ 28.330438] ? irq_work_queue+0x13/0x70
[ 28.331729] ? exc_overflow+0x60/0x60
[ 28.333002] handle_bug+0x2a/0x50
[ 28.334227] exc_invalid_op+0x28/0x80
[ 28.335462] handle_exception+0x15d/0x15d
[ 28.336729] EIP: drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
[ 28.338148] Code: 47 10 8b 58 2c 85 db 0f 84 bc 01 00 00 e8 1f f0 da f4 89 74 24 0c 89 5c 24 08 89 44 24 04 c7 04 24 98 c1 40 df e8 f7 50 1d f5 <0f> 0b 31 c9 c7 04 24 01 00 00 00 ba 01 00 00 00 b8 3c e8 40 df e8
[ 28.341442] EAX: 00000036 EBX: c1c91420 ECX: 00000000 EDX: 00000000
[ 28.342910] ESI: fffffff4 EDI: d2014000 EBP: d2c0dee4 ESP: d2c0de9c
[ 28.344372] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010292
[ 28.345883] ? cpu_latency_qos_write+0xeb/0xf0
[ 28.347203] ? run_init_process+0x5b/0x158
[ 28.348483] ? run_init_process+0x5b/0x158
[ 28.349714] ? exc_overflow+0x60/0x60
[ 28.350895] ? drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
[ 28.352244] process_one_work+0x31b/0x7b0
[ 28.353432] ? process_one_work+0x272/0x7b0
[ 28.354599] worker_thread+0x29a/0x5d0
[ 28.355730] ? process_one_work+0x7b0/0x7b0
[ 28.356894] kthread+0x181/0x1a0
[ 28.357942] ? process_one_work+0x7b0/0x7b0
[ 28.359019] ? kthread_create_worker_on_cpu+0x30/0x30
[ 28.360134] ret_from_fork+0x1c/0x28
[ 28.376652] irq event stamp: 9469
[ 28.377678] hardirqs last enabled at (9477): [<d3903085>] console_unlock+0x515/0x650
[ 28.378986] hardirqs last disabled at (9484): [<d3902f95>] console_unlock+0x425/0x650
[ 28.380284] softirqs last enabled at (9464): [<d467123d>] __do_softirq+0x3fd/0x57c
[ 28.381595] softirqs last disabled at (9381): [<d382793c>] call_on_stack+0x4c/0x60
[ 28.382878] ---[ end trace b5fac24d1c204ab3 ]---
To reproduce:
# build kernel
cd linux
cp config-5.10.0-rc3-01102-g1d46491d4a08 .config
make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 INSTALL_MOD_PATH=<mod-install-dir> modules_install
cd <mod-install-dir>
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
Thanks,
Oliver Sang
View attachment "config-5.10.0-rc3-01102-g1d46491d4a08" of type "text/plain" (147365 bytes)
View attachment "job-script" of type "text/plain" (4433 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (26164 bytes)
View attachment "locktorture" of type "text/plain" (2745 bytes)
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