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Message-ID: <202209260822.7e7775b0-yujie.liu@intel.com>
Date: Mon, 26 Sep 2022 09:16:36 +0800
From: kernel test robot <yujie.liu@...el.com>
To: Pasha Tatashin <pasha.tatashin@...een.com>
CC: <lkp@...ts.01.org>, <lkp@...el.com>, <linux-mm@...ck.org>,
<pasha.tatashin@...een.com>, <akpm@...ux-foundation.org>,
<corbet@....net>, <linux-doc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <rick.p.edgecombe@...el.com>
Subject: [mm/page_table_check] 6e807506f4:
WARNING:at_mm/page_table_check.c:#page_table_check_set
Greeting,
FYI, we noticed the following commit (built with gcc-11):
commit: 6e807506f443c197c1ec2e0037af36f6abc19ca3 ("[PATCH 2/3] mm/page_table_check: Do WARN_ON instead of BUG_ON by default")
url: https://github.com/intel-lab-lkp/linux/commits/Pasha-Tatashin/page-table-check-default-to-warn-instead-of-panic/20220911-180036
base: git://git.lwn.net/linux-2.6 docs-next
patch link: https://lore.kernel.org/linux-mm/20220911095923.3614387-3-pasha.tatashin@soleen.com
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):
[ 32.343753][ T45] ------------[ cut here ]------------
[ 32.344340][ T45] WARNING: CPU: 0 PID: 45 at mm/page_table_check.c:130 page_table_check_set+0x4eb/0x5c0
[ 32.345851][ T45] Modules linked in:
[ 32.346542][ T45] CPU: 0 PID: 45 Comm: kworker/u2:1 Tainted: G T 6.0.0-rc1-00038-g6e807506f443 #1
[ 32.347656][ T45] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014
[ 32.349131][ T45] RIP: page_table_check_set+0x4eb/0x5c0
[ 32.349812][ T45] Code: ff ff e8 38 a7 c0 ff 4c 8d 63 ff e9 35 fc ff ff e8 2a a7 c0 ff 31 ff 44 89 ee e8 a0 a1 c0 ff 45 84 ed 75 58 e8 16 a7 c0 ff 90 <0f> 0b 90 48 c7 c7 80 4b 89 84 e8 46 ed e3 ff e9 7f fb ff ff e8 fc
All code
========
0: ff (bad)
1: ff (bad)
2: e8 38 a7 c0 ff callq 0xffffffffffc0a73f
7: 4c 8d 63 ff lea -0x1(%rbx),%r12
b: e9 35 fc ff ff jmpq 0xfffffffffffffc45
10: e8 2a a7 c0 ff callq 0xffffffffffc0a73f
15: 31 ff xor %edi,%edi
17: 44 89 ee mov %r13d,%esi
1a: e8 a0 a1 c0 ff callq 0xffffffffffc0a1bf
1f: 45 84 ed test %r13b,%r13b
22: 75 58 jne 0x7c
24: e8 16 a7 c0 ff callq 0xffffffffffc0a73f
29: 90 nop
2a:* 0f 0b ud2 <-- trapping instruction
2c: 90 nop
2d: 48 c7 c7 80 4b 89 84 mov $0xffffffff84894b80,%rdi
34: e8 46 ed e3 ff callq 0xffffffffffe3ed7f
39: e9 7f fb ff ff jmpq 0xfffffffffffffbbd
3e: e8 .byte 0xe8
3f: fc cld
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 90 nop
3: 48 c7 c7 80 4b 89 84 mov $0xffffffff84894b80,%rdi
a: e8 46 ed e3 ff callq 0xffffffffffe3ed55
f: e9 7f fb ff ff jmpq 0xfffffffffffffb93
14: e8 .byte 0xe8
15: fc cld
[ 32.351854][ T45] RSP: 0000:ffff888151d2f868 EFLAGS: 00010293
[ 32.352741][ T45] RAX: 0000000000000000 RBX: 00000000003ad53c RCX: 0000000000000000
[ 32.353600][ T45] RDX: ffff888151821800 RSI: ffffffff81912dea RDI: 0000000000000003
[ 32.354622][ T45] RBP: ffff888151d2f8a8 R08: ffff888151d2f850 R09: ffff888151822894
[ 32.355421][ T45] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000001
[ 32.356513][ T45] R13: 0000000000000000 R14: 000000000000512b R15: 0000000000000001
[ 32.357677][ T45] FS: 0000000000000000(0000) GS:ffffffff8432c000(0000) knlGS:0000000000000000
[ 32.358950][ T45] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 32.359618][ T45] CR2: ffff88843ffff000 CR3: 000000000423a000 CR4: 00000000000406f0
[ 32.360505][ T45] Call Trace:
[ 32.360866][ T45] <TASK>
[ 32.361477][ T45] __page_table_check_pte_set (??:?)
[ 32.362463][ T45] ? __page_table_check_pte_clear (??:?)
[ 32.363101][ T45] ? lru_cache_add (??:?)
[ 32.363589][ T45] do_anonymous_page (memory.c:?)
[ 32.364135][ T45] handle_pte_fault (memory.c:?)
[ 32.365057][ T45] ? write_comp_data (kcov.c:?)
[ 32.365971][ T45] __handle_mm_fault (memory.c:?)
[ 32.366860][ T45] ? __pmd_alloc (memory.c:?)
[ 32.367567][ T45] ? write_comp_data (kcov.c:?)
[ 32.368308][ T45] ? __raw_spin_unlock_irqrestore (spinlock.c:?)
[ 32.369018][ T45] ? _raw_spin_unlock_irqrestore (??:?)
[ 32.369624][ T45] ? write_comp_data (kcov.c:?)
[ 32.370276][ T45] handle_mm_fault (??:?)
[ 32.371123][ T45] ? write_comp_data (kcov.c:?)
[ 32.371799][ T45] faultin_page (gup.c:?)
[ 32.372591][ T45] __get_user_pages (gup.c:?)
[ 32.373397][ T45] ? get_gate_page (gup.c:?)
[ 32.374221][ T45] ? lock_acquire (??:?)
[ 32.375194][ T45] ? __bprm_mm_init (exec.c:?)
[ 32.376070][ T45] ? write_comp_data (kcov.c:?)
[ 32.377012][ T45] __get_user_pages_remote (gup.c:?)
[ 32.378062][ T45] ? ikconfig_read_current (configs.c:?)
[ 32.379058][ T45] get_user_pages_remote (??:?)
[ 32.379934][ T45] get_arg_page (exec.c:?)
[ 32.380468][ T45] ? count_strings_kernel+0x1c0/0x1c0
[ 32.381190][ T45] ? write_comp_data (kcov.c:?)
[ 32.382005][ T45] copy_string_kernel (??:?)
[ 32.382701][ T45] ? count_strings_kernel+0x15f/0x1c0
[ 32.383642][ T45] kernel_execve (??:?)
[ 32.384391][ T45] call_usermodehelper_exec_async (umh.c:?)
[ 32.385463][ T45] ? calculate_sigpending (??:?)
[ 32.386410][ T45] ? umh_complete (umh.c:?)
[ 32.387225][ T45] ret_from_fork (??:?)
[ 32.388078][ T45] </TASK>
[ 32.388637][ T45] irq event stamp: 521
[ 32.389376][ T45] hardirqs last enabled at (529): __up_console_sem (printk.c:?)
[ 32.391184][ T45] hardirqs last disabled at (550): __up_console_sem (printk.c:?)
[ 32.392684][ T45] softirqs last enabled at (548): __do_softirq (??:?)
[ 32.393662][ T45] softirqs last disabled at (537): __irq_exit_rcu (softirq.c:?)
[ 32.394619][ T45] ---[ end trace 0000000000000000 ]---
If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@...el.com>
| Link: https://lore.kernel.org/r/202209260822.7e7775b0-yujie.liu@intel.com
To reproduce:
# build kernel
cd linux
cp config-6.0.0-rc1-00038-g6e807506f443 .config
make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 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-6.0.0-rc1-00038-g6e807506f443" of type "text/plain" (139588 bytes)
View attachment "job-script" of type "text/plain" (4963 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (31660 bytes)
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