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Date: Sun, 17 Apr 2022 17:17:09 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...nel.org>, lkp@...ts.01.org, lkp@...el.com,
LKML <linux-kernel@...r.kernel.org>, aubrey.li@...ux.intel.com,
yu.c.chen@...el.com
Subject: [sched/fair] 106a077d11: divide_error:#[##]
Greeting,
FYI, we noticed the following commit (built with gcc-11):
commit: 106a077d11091d5be160d6fc035e11f31dd6ba22 ("sched/fair: Fold the sched_avg update")
https://git.kernel.org/cgit/linux/kernel/git/peterz/queue.git sched/wip
in testcase: boot
on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------------------+------------+------------+
| | 6267ca8dcb | 106a077d11 |
+------------------------------------------+------------+------------+
| boot_failures | 0 | 56 |
| divide_error:#[##] | 0 | 56 |
| EIP:post_init_entity_util_avg | 0 | 49 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 49 |
+------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 16.561460][ T434] divide error: 0000 [#1] SMP PTI
[ 16.562135][ T434] CPU: 0 PID: 434 Comm: post-run Tainted: G E 5.18.0-rc2-00012-g106a077d1109 #5
[ 16.563307][ T434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 16.564349][ T434] EIP: post_init_entity_util_avg+0xc0/0x180
[ 16.565023][ T434] Code: 89 93 04 01 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 0f af 83 80 00 00 00 89 83 28 01 00 00 8b 96 a0 00 00 00 8d 7a
01 31 d2 <f7> f7 39 c8 0f 87 65 ff ff ff 89 83 28 01 00 00 89 c1 e9 5e ff ff
[ 16.567260][ T434] EAX: 00000800 EBX: c3fe0000 ECX: 000001ff EDX: 00000000
[ 16.568070][ T434] ESI: c3f95a00 EDI: 00000000 EBP: f5453ed0 ESP: f5453ec4
[ 16.568875][ T434] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010046
[ 16.569776][ T434] CR0: 80050033 CR2: b7f5b240 CR3: 35864000 CR4: 000406f0
[ 16.570587][ T434] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 16.571357][ T434] DR6: fffe0ff0 DR7: 00000400
[ 16.571863][ T434] Call Trace:
[ 16.572244][ T434] wake_up_new_task+0x122/0x300
[ 16.572794][ T434] kernel_clone+0xd3/0x400
[ 16.573294][ T434] __ia32_sys_clone+0x6c/0xc0
[ 16.573838][ T434] __do_fast_syscall_32+0x5b/0x100
[ 16.574420][ T434] do_fast_syscall_32+0x29/0x80
[ 16.574974][ T434] do_SYSENTER_32+0x15/0x40
[ 16.575491][ T434] entry_SYSENTER_32+0x98/0xf1
[ 16.576034][ T434] EIP: 0xb7f60589
[ 16.576452][ T434] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f
34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
[ 16.578671][ T434] EAX: ffffffda EBX: 01200011 ECX: 00000000 EDX: 00000000
[ 16.579477][ T434] ESI: 00000000 EDI: b7f5b2e8 EBP: bfd9b698 ESP: bfd9b660
[ 16.580278][ T434] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246
[ 16.581149][ T434] Modules linked in: intel_rapl_msr(E) intel_rapl_common(E) crc32_pclmul(E) crc32c_intel(E) ppdev(E) aesni_intel(E) ata_generic(E) bochs(E) drm_vram_helper(E) drm_ttm_helper(E) crypto_simd(E) ttm(E) cryptd(E) rapl(E) psmouse(E) evdev(E) drm_kms_helper(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) ata_piix(E) fb_sys_fops(E) drm(E) serio_raw(E) libata(E) i2c_piix4(E) floppy(E) parport_pc(E) parport(E) qemu_fw_cfg(E) button(E) autofs4(E)
[ 16.585732][ T434] ---[ end trace 0000000000000000 ]---
[ 16.586357][ T434] EIP: post_init_entity_util_avg+0xc0/0x180
[ 16.587030][ T434] Code: 89 93 04 01 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 0f af 83 80 00 00 00 89 83 28 01 00 00 8b 96 a0 00 00 00 8d 7a 01 31 d2 <f7> f7 39 c8 0f 87 65 ff ff ff 89 83 28 01 00 00 89 c1 e9 5e ff ff
[ 16.589239][ T434] EAX: 00000800 EBX: c3fe0000 ECX: 000001ff EDX: 00000000
[ 16.590051][ T434] ESI: c3f95a00 EDI: 00000000 EBP: f5453ed0 ESP: f5453ec4
[ 16.590853][ T434] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010046
[ 16.591721][ T434] CR0: 80050033 CR2: b7f5b240 CR3: 35864000 CR4: 000406f0
[ 16.592529][ T434] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 16.593332][ T434] DR6: fffe0ff0 DR7: 00000400
[ 16.593873][ T434] Kernel panic - not syncing: Fatal exception
[ 17.688595][ T434] Shutting down cpus with NMI
[ 17.689336][ T434] Kernel Offset: disabled
To reproduce:
# build kernel
cd linux
cp config-5.18.0-rc2-00012-g106a077d1109 .config
make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-11 CC=gcc-11 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
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
--
0-DAY CI Kernel Test Service
https://01.org/lkp
View attachment "config-5.18.0-rc2-00012-g106a077d1109" of type "text/plain" (141802 bytes)
View attachment "job-script" of type "text/plain" (4605 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (13792 bytes)
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