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Date: Tue, 26 Jan 2021 15:19:58 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Lai Jiangshan <jiangshanlai@...il.com>
Cc: 0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
lkp@...ts.01.org, Valentin Schneider <valentin.schneider@....com>,
Peter Zijlstra <peterz@...radead.org>,
Qian Cai <cai@...hat.com>,
Vincent Donnefort <vincent.donnefort@....com>,
Tejun Heo <tj@...nel.org>,
"Paul E . McKenney" <paulmck@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Lai Jiangshan <laijs@...ux.alibaba.com>,
Lai Jiangshan <jiangshanlai@...il.com>
Subject: [workqueue] a1438771e1:
WARNING:at_kernel/workqueue.c:#workqueue_online_cpu
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: a1438771e19f8ab34a08c59d5ba2251b8ab438ab ("[PATCH] workqueue: keep unbound rescuer's cpumask to be default cpumask")
url: https://github.com/0day-ci/linux/commits/Lai-Jiangshan/workqueue-keep-unbound-rescuer-s-cpumask-to-be-default-cpumask/20210116-140244
base: https://git.kernel.org/cgit/linux/kernel/git/tj/wq.git for-next
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-----------------------------------------------------+------------+------------+
| | ac87f8ff6c | a1438771e1 |
+-----------------------------------------------------+------------+------------+
| boot_successes | 4 | 0 |
| boot_failures | 0 | 4 |
| WARNING:at_kernel/workqueue.c:#workqueue_online_cpu | 0 | 4 |
| RIP:workqueue_online_cpu | 0 | 4 |
+-----------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 0.490413] WARNING: CPU: 1 PID: 14 at kernel/workqueue.c:5107 workqueue_online_cpu (kbuild/src/consumer/kernel/workqueue.c:5107 kbuild/src/consumer/kernel/workqueue.c:5158)
[ 0.491392] Modules linked in:
[ 0.491963] CPU: 1 PID: 14 Comm: cpuhp/1 Not tainted 5.10.0-rc5-ga1438771e19f #1
[ 0.493359] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 0.494372] RIP: 0010:workqueue_online_cpu (kbuild/src/consumer/kernel/workqueue.c:5107 kbuild/src/consumer/kernel/workqueue.c:5158)
[ 0.495206] Code: ee ff ff 8b 05 89 ae 1a 02 85 c0 0f 84 57 ff ff ff be ff ff ff ff 48 c7 c7 28 a0 89 98 e8 14 87 c0 00 85 c0 0f 85 3e ff ff ff <0f> 0b e9 37 ff ff ff 48 c7 c7 60 a0 89 98 e8 99 4a c1 00 48 8b 44
All code
========
0: ee out %al,(%dx)
1: ff (bad)
2: ff 8b 05 89 ae 1a decl 0x1aae8905(%rbx)
8: 02 85 c0 0f 84 57 add 0x57840fc0(%rbp),%al
e: ff (bad)
f: ff (bad)
10: ff (bad)
11: be ff ff ff ff mov $0xffffffff,%esi
16: 48 c7 c7 28 a0 89 98 mov $0xffffffff9889a028,%rdi
1d: e8 14 87 c0 00 callq 0xc08736
22: 85 c0 test %eax,%eax
24: 0f 85 3e ff ff ff jne 0xffffffffffffff68
2a:* 0f 0b ud2 <-- trapping instruction
2c: e9 37 ff ff ff jmpq 0xffffffffffffff68
31: 48 c7 c7 60 a0 89 98 mov $0xffffffff9889a060,%rdi
38: e8 99 4a c1 00 callq 0xc14ad6
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 44 rex.R
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: e9 37 ff ff ff jmpq 0xffffffffffffff3e
7: 48 c7 c7 60 a0 89 98 mov $0xffffffff9889a060,%rdi
e: e8 99 4a c1 00 callq 0xc14aac
13: 48 rex.W
14: 8b .byte 0x8b
15: 44 rex.R
[ 0.497370] RSP: 0000:ffffafe580083e08 EFLAGS: 00010246
[ 0.498302] RAX: 0000000000000000 RBX: ffff8b7c40056800 RCX: 0000000000000001
[ 0.499370] RDX: 0000000000000000 RSI: ffffffff9818ef6f RDI: 0000000000000246
[ 0.500366] RBP: 0000000000000001 R08: 0000000000000000 R09: ffff8b7c40400000
[ 0.501366] R10: 0000000000000043 R11: 0000000000000005 R12: ffff8b7d77d2d828
[ 0.502361] R13: 0000000000000001 R14: 0000000000000001 R15: ffff8b7d77d2d7e0
[ 0.502361] FS: 0000000000000000(0000) GS:ffff8b7d77d00000(0000) knlGS:0000000000000000
[ 0.503339] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.504369] CR2: 0000000000000000 CR3: 000000011aa26000 CR4: 00000000000406e0
[ 0.505363] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 0.506331] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 0.507363] Call Trace:
[ 0.507924] ? workqueue_prepare_cpu (kbuild/src/consumer/kernel/workqueue.c:5137)
[ 0.508377] cpuhp_invoke_callback (kbuild/src/consumer/kernel/cpu.c:173)
[ 0.509083] cpuhp_thread_fun (kbuild/src/consumer/kernel/cpu.c:711)
[ 0.510367] ? smpboot_thread_fn (kbuild/src/consumer/arch/x86/include/asm/preempt.h:102 (discriminator 4) kbuild/src/consumer/kernel/smpboot.c:164 (discriminator 4))
[ 0.510969] ? smpboot_thread_fn (kbuild/src/consumer/kernel/smpboot.c:113)
[ 0.511359] smpboot_thread_fn (kbuild/src/consumer/kernel/smpboot.c:165 (discriminator 3))
[ 0.512389] ? sort_range (kbuild/src/consumer/kernel/smpboot.c:108)
[ 0.513009] kthread (kbuild/src/consumer/kernel/kthread.c:292)
[ 0.513358] ? kthread_park (kbuild/src/consumer/kernel/kthread.c:245)
[ 0.514014] ret_from_fork (kbuild/src/consumer/arch/x86/entry/entry_64.S:302)
[ 0.517423] irq event stamp: 353
[ 0.518063] hardirqs last enabled at (361): console_unlock (kbuild/src/consumer/kernel/printk/printk.c:2528 (discriminator 1))
[ 0.521397] hardirqs last disabled at (370): console_unlock (kbuild/src/consumer/kernel/printk/printk.c:2443 (discriminator 1))
[ 0.521397] softirqs last enabled at (0): copy_process (kbuild/src/consumer/include/linux/lockdep.h:195 kbuild/src/consumer/include/linux/lockdep.h:201 kbuild/src/consumer/include/linux/seqlock.h:78 kbuild/src/consumer/kernel/fork.c:2040)
[ 0.522339] softirqs last disabled at (0): 0x0
[ 0.522407] ---[ end trace 25430c6e7bf20648 ]---
[ 0.523176] ------------[ cut here ]------------
To reproduce:
# build kernel
cd linux
cp config-5.10.0-rc5-ga1438771e19f .config
make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage
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,
Oliver Sang
View attachment "config-5.10.0-rc5-ga1438771e19f" of type "text/plain" (210750 bytes)
View attachment "job-script" of type "text/plain" (4595 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (14496 bytes)
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