linux-kernel - [x86/hotplug] e1056a25da: WARNING:at_arch/x86/kernel/apic/apic.c:#setup_local

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Date:   Thu, 20 Jun 2019 10:18:56 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>, tipbuild@...or.com,
        lkp@...org
Subject: [x86/hotplug] e1056a25da:
 WARNING:at_arch/x86/kernel/apic/apic.c:#setup_local_APIC

FYI, we noticed the following commit (built with gcc-7):

commit: e1056a25daa6460c95e92d7d6853d05ad62458f7 ("x86/hotplug: Silence APIC and NMI when CPU is dead")
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git WIP.x86/ipi

in testcase: locktorture
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-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 2G

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


+----------------------------------------------------------+------------+------------+
|                                                          | c1257b49b9 | e1056a25da |
+----------------------------------------------------------+------------+------------+
| boot_successes                                           | 8          | 6          |
| boot_failures                                            | 51         | 48         |
| BUG:kernel_reboot-without-warning_in_test_stage          | 50         | 22         |
| BUG:soft_lockup-CPU##stuck_for#s                         | 1          |            |
| RIP:__memcpy                                             | 1          |            |
| Kernel_panic-not_syncing:softlockup:hung_tasks           | 1          |            |
| WARNING:at_arch/x86/kernel/apic/apic.c:#setup_local_APIC | 0          | 26         |
| RIP:setup_local_APIC                                     | 0          | 26         |
+----------------------------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>


[  216.682229] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/apic/apic.c:1473 setup_local_APIC+0x250/0x3b0
[  216.724190] Modules linked in: locktorture torture sr_mod cdrom ata_generic pata_acpi bochs_drm ttm ppdev drm_kms_helper ata_piix syscopyarea snd_pcm sysfillrect sysimgblt libata fb_sys_fops snd_timer snd drm crc32c_intel soundcore joydev serio_raw pcspkr i2c_piix4 parport_pc parport floppy
[  216.771348] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.2.0-rc5-00003-ge1056a2 #1
[  216.785027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[  216.800351] RIP: 0010:setup_local_APIC+0x250/0x3b0
[  216.809104] Code: 30 8b 0d eb 78 7d 01 85 c9 74 26 0f 31 c1 e1 0a 48 c1 e2 20 41 89 ce 4c 03 34 24 48 09 d0 49 29 c6 4d 85 f6 0f 8f 74 fe ff ff <0f> 0b e9 22 ff ff ff 49 83 ee 01 eb ea a9 00 00 01 00 8b 15 2c ac
[  216.843098] RSP: 0000:ffffffff89a03ee0 EFLAGS: 00010082
[  216.852617] RAX: 00000076a573f693 RBX: 0000000000000020 RCX: 0000000089ff6800
[  216.865848] RDX: 0000007600000000 RSI: 0000000000000020 RDI: ffffffff89a03ef0
[  216.878971] RBP: 0000000000000000 R08: ffffffff8a348de2 R09: 0000000000000032
[  216.892080] R10: ffffffff89a03ee8 R11: 0000000000000000 R12: 00000000000000f0
[  216.905019] R13: 0000000000001000 R14: fffffffffffc1cfb R15: 0000000000000000
[  216.918205] FS:  0000000000000000(0000) GS:ffff89af74800000(0000) knlGS:0000000000000000
[  216.941317] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  216.951812] CR2: 0000000057567184 CR3: 000000000ba0a000 CR4: 00000000000006f0
[  216.964997] Call Trace:
[  216.969667]  apic_ap_setup+0xa/0x20
[  216.976266]  start_secondary+0x78/0x1e0
[  216.983423]  secondary_startup_64+0xb6/0xc0
[  216.991271] ---[ end trace 06172ec0274b1dfa ]---


To reproduce:

        # build kernel
	cd linux
	cp config-5.2.0-rc5-00003-ge1056a2 .config
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 bzImage


        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
	bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email




Thanks,
Rong Chen


View attachment "config-5.2.0-rc5-00003-ge1056a2" of type "text/plain" (196393 bytes)

View attachment "job-script" of type "text/plain" (4555 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (15576 bytes)

View attachment "locktorture" of type "text/plain" (2729 bytes)