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Date: Wed, 5 May 2021 22:36:16 +0800
From: kernel test robot <oliver.sang@...el.com>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
John Stultz <john.stultz@...aro.org>,
Stephen Boyd <sboyd@...nel.org>,
Jonathan Corbet <corbet@....net>,
Mark Rutland <Mark.Rutland@....com>,
Marc Zyngier <maz@...nel.org>, Andi Kleen <ak@...ux.intel.com>,
Feng Tang <feng.tang@...el.com>,
Xing Zhengjun <zhengjun.xing@...ux.intel.com>,
Chris Mason <clm@...com>, LKML <linux-kernel@...r.kernel.org>,
Linux Memory Management List <linux-mm@...ck.org>,
lkp@...ts.01.org, lkp@...el.com
Subject: [clocksource] 8e614d5b58:
WARNING:at_kernel/time/clocksource-wdtest.c:#wdtest_func.cold
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 8e614d5b58992e722f07de7c2426f2c44668092b ("clocksource: Provide kernel module to test clocksource watchdog")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------------------------+------------+------------+
| | bdbd9c673e | 8e614d5b58 |
+-------------------------------------------------------------------------+------------+------------+
| WARNING:at_kernel/time/clocksource-wdtest.c:#wdtest_func.cold | 0 | 11 |
| RIP:wdtest_func.cold | 0 | 11 |
+-------------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 123.866590] WARNING: CPU: 1 PID: 221 at kernel/time/clocksource-wdtest.c:153 wdtest_func.cold (kbuild/src/consumer/kernel/time/clocksource-wdtest.c:153 (discriminator 4))
[ 123.870382] Modules linked in:
[ 123.871899] CPU: 1 PID: 221 Comm: wdtest Not tainted 5.12.0-rc5-00005-g8e614d5b5899 #1
[ 123.875044] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 123.878324] RIP: 0010:wdtest_func.cold (kbuild/src/consumer/kernel/time/clocksource-wdtest.c:153 (discriminator 4))
[ 123.880459] Code: 00 00 44 89 25 87 bf d7 11 e8 02 7e a0 00 44 8b 2d 7b bf d7 11 31 ff 44 89 ee e8 91 52 13 f6 45 85 ed 74 09 e8 c7 50 13 f6 90 <0f> 0b 90 e8 be 50 13 f6 48 c7 c7 a0 94 78 a1 e8 72 1e 4a f6 4c 8b
All code
========
0: 00 00 add %al,(%rax)
2: 44 89 25 87 bf d7 11 mov %r12d,0x11d7bf87(%rip) # 0x11d7bf90
9: e8 02 7e a0 00 callq 0xa07e10
e: 44 8b 2d 7b bf d7 11 mov 0x11d7bf7b(%rip),%r13d # 0x11d7bf90
15: 31 ff xor %edi,%edi
17: 44 89 ee mov %r13d,%esi
1a: e8 91 52 13 f6 callq 0xfffffffff61352b0
1f: 45 85 ed test %r13d,%r13d
22: 74 09 je 0x2d
24: e8 c7 50 13 f6 callq 0xfffffffff61350f0
29: 90 nop
2a:* 0f 0b ud2 <-- trapping instruction
2c: 90 nop
2d: e8 be 50 13 f6 callq 0xfffffffff61350f0
32: 48 c7 c7 a0 94 78 a1 mov $0xffffffffa17894a0,%rdi
39: e8 72 1e 4a f6 callq 0xfffffffff64a1eb0
3e: 4c rex.WR
3f: 8b .byte 0x8b
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 90 nop
3: e8 be 50 13 f6 callq 0xfffffffff61350c6
8: 48 c7 c7 a0 94 78 a1 mov $0xffffffffa17894a0,%rdi
f: e8 72 1e 4a f6 callq 0xfffffffff64a1e86
14: 4c rex.WR
15: 8b .byte 0x8b
[ 123.895351] RSP: 0000:ffffc90000617ee8 EFLAGS: 00010246
[ 123.897547] RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff97c8448f
[ 123.900366] RDX: 0000000000000000 RSI: ffff888116751000 RDI: 0000000000000002
[ 123.903304] RBP: ffffffff98d2b040 R08: 0000000000000001 R09: 0000000000000001
[ 123.906043] R10: ffffffffabfac92b R11: fffffbfff57f5925 R12: 0000000000000003
[ 123.908754] R13: 0000000000000003 R14: ffffffff98d2b040 R15: 0000000000000000
[ 123.911564] FS: 0000000000000000(0000) GS:ffff88839d000000(0000) knlGS:0000000000000000
[ 123.914936] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 123.917199] CR2: 0000000000000000 CR3: 0000000067cba000 CR4: 00000000000006e0
[ 123.919858] Call Trace:
[ 123.921124] ? wdtest_ktime_read (kbuild/src/consumer/kernel/time/clocksource-wdtest.c:106)
[ 123.922819] kthread (kbuild/src/consumer/kernel/kthread.c:292)
[ 123.924411] ? kthread_insert_work_sanity_check (kbuild/src/consumer/kernel/kthread.c:245)
[ 123.926635] ret_from_fork (kbuild/src/consumer/arch/x86/entry/entry_64.S:300)
[ 123.933080] irq event stamp: 645
[ 123.934547] hardirqs last enabled at (653): console_unlock (kbuild/src/consumer/kernel/printk/printk.c:2605 (discriminator 1))
[ 123.938065] hardirqs last disabled at (662): console_unlock (kbuild/src/consumer/kernel/printk/printk.c:2520 (discriminator 1))
[ 123.941502] softirqs last enabled at (414): __do_softirq (kbuild/src/consumer/arch/x86/include/asm/preempt.h:27 kbuild/src/consumer/kernel/softirq.c:373)
[ 123.944829] softirqs last disabled at (407): irq_exit_rcu (kbuild/src/consumer/kernel/softirq.c:221 kbuild/src/consumer/kernel/softirq.c:422 kbuild/src/consumer/kernel/softirq.c:434)
[ 123.948225] _warn_unseeded_randomness: 7 callbacks suppressed
[ 123.948286] random: get_random_bytes called from print_oops_end_marker+0x3b/0x60 with crng_init=0
[ 123.948378] ---[ end trace 66b1de777cc6b4b9 ]---
[ 123.957630] clocksource_wdtest: --- Watchdog with 4x error injection, 3 retries, expect clock skew.
[ 125.976675] ------------[ cut here ]------------
To reproduce:
# build kernel
cd linux
cp config-5.12.0-rc5-00005-g8e614d5b5899 .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
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation
Thanks,
Oliver Sang
View attachment "config-5.12.0-rc5-00005-g8e614d5b5899" of type "text/plain" (269841 bytes)
View attachment "job-script" of type "text/plain" (4341 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (19768 bytes)
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