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Message-ID: <20201206155949.GB19216@xsang-OptiPlex-9020>
Date: Sun, 6 Dec 2020 23:59:49 +0800
From: kerne test robot <oliver.sang@...el.com>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Ming Lei <ming.lei@...hat.com>, Jens Axboe <axboe@...nel.dk>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
lkp@...el.com
Subject: [percpu_ref] 2c05cc5920:
WARNING:at_arch/x86/mm/pat/set_memory.c:#__cpa_process_fault
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 2c05cc5920504514a39df422145c68306f030a60 ("percpu_ref: Print stack trace upon reference-count underflow")
https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git rcu/next
in testcase: boot
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):
+--------------------------------------------------------------+------------+------------+
| | bb70203c00 | 2c05cc5920 |
+--------------------------------------------------------------+------------+------------+
| WARNING:at_arch/x86/mm/pat/set_memory.c:#__cpa_process_fault | 0 | 2 |
| EIP:__cpa_process_fault | 0 | 2 |
| kernel_BUG_at_arch/x86/mm/physaddr.c | 0 | 2 |
| PANIC:early_exception | 0 | 2 |
| EIP:__phys_addr | 0 | 2 |
+--------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 15.289525] WARNING: CPU: 0 PID: 0 at arch/x86/mm/pat/set_memory.c:1501 __cpa_process_fault+0x24f/0x292
[ 15.293917] Modules linked in:
[ 15.295329] CPU: 0 PID: 0 Comm: swapper Not tainted 5.10.0-rc1-00218-g2c05cc592050 #7
[ 15.298798] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 15.303054] EIP: __cpa_process_fault+0x24f/0x292
[ 15.305327] Code: 06 83 05 d0 da c7 dd 01 83 15 d4 da c7 dd 00 ff 30 53 68 e5 22 0f dd e8 4f e6 25 01 83 05 d8 da c7 dd 01 83 15 dc da c7 dd 00 <0f> 0b 83 05 e0 da c7 dd 01 ba 01 00 00 00 6a 01 b8 b8 df a6 dd bf
[ 15.313812] EAX: 00000040 EBX: dedfe000 ECX: 00000000 EDX: 00000000
[ 15.316903] ESI: dd2d7f04 EDI: 00000001 EBP: dd2d7e68 ESP: dd2d7e40
[ 15.319889] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00210046
[ 15.322872] CR0: 80050033 CR2: ffbff000 CR3: 1dc30000 CR4: 000406b0
[ 15.325934] Call Trace:
[ 15.327141] ? 0xdb200000
[ 15.328474] ? lookup_address+0x2b/0x3c
[ 15.330371] __change_page_attr+0xa6/0x3c7
[ 15.332352] __change_page_attr_set_clr+0x72/0x2a5
[ 15.334627] ? mutex_unlock+0x27/0x37
[ 15.336421] ? _vm_unmap_aliases+0x1da/0x1f0
[ 15.338485] change_page_attr_set_clr+0x274/0x307
[ 15.340747] change_page_attr_clear+0x34/0x44
[ 15.343233] set_memory_nonglobal+0x24/0x34
[ 15.345150] ? 0xdb200000
[ 15.346415] pti_init+0x1e0/0x215
[ 15.348155] start_kernel+0x555/0xce7
[ 15.350003] i386_start_kernel+0xf8/0x108
[ 15.351908] startup_32_smp+0x15f/0x164
[ 15.356949] CPU: 0 PID: 0 Comm: swapper Not tainted 5.10.0-rc1-00218-g2c05cc592050 #7
[ 15.360401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 15.364438] Call Trace:
[ 15.365723] dump_stack+0x45/0x63
[ 15.367318] __warn+0x136/0x177
[ 15.368869] report_bug+0x11f/0x1a4
[ 15.370642] ? __cpa_process_fault+0x24f/0x292
[ 15.372788] ? exc_overflow+0x6f/0x6f
[ 15.374526] handle_bug+0x77/0xc6
[ 15.376113] exc_invalid_op+0x40/0xdb
[ 15.377950] handle_exception+0x164/0x167
[ 15.379734] EIP: __cpa_process_fault+0x24f/0x292
[ 15.381687] Code: 06 83 05 d0 da c7 dd 01 83 15 d4 da c7 dd 00 ff 30 53 68 e5 22 0f dd e8 4f e6 25 01 83 05 d8 da c7 dd 01 83 15 dc da c7 dd 00 <0f> 0b 83 05 e0 da c7 dd 01 ba 01 00 00 00 6a 01 b8 b8 df a6 dd bf
[ 15.390055] EAX: 00000040 EBX: dedfe000 ECX: 00000000 EDX: 00000000
[ 15.393095] ESI: dd2d7f04 EDI: 00000001 EBP: dd2d7e68 ESP: dd2d7e40
[ 15.396127] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00210046
[ 15.399628] ? pci_mmconfig_insert+0x2b6/0x35a
[ 15.401937] ? exc_overflow+0x6f/0x6f
[ 15.403552] ? pci_mmconfig_insert+0x2b6/0x35a
[ 15.405625] ? exc_overflow+0x6f/0x6f
[ 15.411446] ? __cpa_process_fault+0x24f/0x292
[ 15.413584] ? 0xdb200000
[ 15.414558] ? lookup_address+0x2b/0x3c
[ 15.416292] __change_page_attr+0xa6/0x3c7
[ 15.418204] __change_page_attr_set_clr+0x72/0x2a5
[ 15.420295] ? mutex_unlock+0x27/0x37
[ 15.421927] ? _vm_unmap_aliases+0x1da/0x1f0
[ 15.424070] change_page_attr_set_clr+0x274/0x307
[ 15.426364] change_page_attr_clear+0x34/0x44
[ 15.428892] set_memory_nonglobal+0x24/0x34
[ 15.430966] ? 0xdb200000
[ 15.432219] pti_init+0x1e0/0x215
[ 15.433816] start_kernel+0x555/0xce7
[ 15.435254] i386_start_kernel+0xf8/0x108
[ 15.437111] startup_32_smp+0x15f/0x164
[ 15.438937] ---[ end trace c5ab853cca4be851 ]---
To reproduce:
# build kernel
cd linux
cp config-5.10.0-rc1-00218-g2c05cc592050 .config
make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 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-rc1-00218-g2c05cc592050" of type "text/plain" (132247 bytes)
View attachment "job-script" of type "text/plain" (4634 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (18732 bytes)
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