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Date: Fri, 12 Apr 2024 11:18:41 +0800
From: kernel test robot <oliver.sang@intel.com>
To: Barry Song <v-songbaohua@oppo.com>
CC: <oe-lkp@lists.linux.dev>, <lkp@intel.com>, Linux Memory Management List
	<linux-mm@kvack.org>, Andrew Morton <akpm@linux-foundation.org>, Yujie Liu
	<yujie.liu@intel.com>, <linux-kernel@vger.kernel.org>,
	<oliver.sang@intel.com>
Subject: [linux-next:master] [mm]  cf5dec6389:
 WARNING:at_arch/x86/mm/fault.c:#do_user_addr_fault
Message-ID: <202404121129.c53d5406-oliver.sang@intel.com>
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Hello,

kernel test robot noticed "WARNING:at_arch/x86/mm/fault.c:#do_user_addr_fault" on:

commit: cf5dec6389f307a43c6c494660e28f16c7e0265a ("mm: fix powerpc build issue")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

[test failed on linux-next/master a053fd3ca5d1b927a8655f239c84b0d790218fda]

in testcase: boot

compiler: clang-17
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+----------------------------------------------------+------------+------------+
|                                                    | d9130022ad | cf5dec6389 |
+----------------------------------------------------+------------+------------+
| WARNING:at_arch/x86/mm/fault.c:#do_user_addr_fault | 0          | 6          |
| EIP:do_user_addr_fault                             | 0          | 6          |
| EIP:string                                         | 0          | 6          |
| BUG:unable_to_handle_page_fault_for_address        | 0          | 6          |
| Oops:#[##]                                         | 0          | 6          |
| Kernel_panic-not_syncing:Fatal_exception           | 0          | 6          |
+----------------------------------------------------+------------+------------+


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202404121129.c53d5406-oliver.sang@intel.com


[  122.507941][  T251] ------------[ cut here ]------------
[  122.508786][  T251] ------------[ cut here ]------------
[ 122.509528][ T251] WARNING: CPU: 1 PID: 251 at arch/x86/mm/fault.c:1308 do_user_addr_fault (arch/x86/mm/fault.c:1308) 
[  122.510801][  T251] Modules linked in: crc32_pclmul aesni_intel crypto_simd evdev drm drm_panel_orientation_quirks firmware_class zstd_decompress zstd_common autofs4
[  122.512743][  T251] CPU: 1 PID: 251 Comm: dpkg-deb Tainted: G        W        N 6.9.0-rc2-00330-gcf5dec6389f3 #1
[  122.514132][  T251] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 122.515462][ T251] EIP: do_user_addr_fault (arch/x86/mm/fault.c:1308) 
[ 122.516186][ T251] Code: 03 00 00 83 c4 04 e9 ba fd ff ff 0f 0b e9 b3 fd ff ff 89 f9 89 da 56 e8 ff 06 00 00 8b 55 e8 8b 4d e4 83 c4 04 e9 c8 fc ff ff <0f> 0b 89 f9 89 da 56 e8 b5 00 00 00 83 c4 04 e9 87 fd ff ff 8b 45
All code
========
   0:	03 00                	add    (%rax),%eax
   2:	00 83 c4 04 e9 ba    	add    %al,-0x4516fb3c(%rbx)
   8:	fd                   	std
   9:	ff                   	(bad)
   a:	ff 0f                	decl   (%rdi)
   c:	0b e9                	or     %ecx,%ebp
   e:	b3 fd                	mov    $0xfd,%bl
  10:	ff                   	(bad)
  11:	ff 89 f9 89 da 56    	decl   0x56da89f9(%rcx)
  17:	e8 ff 06 00 00       	call   0x71b
  1c:	8b 55 e8             	mov    -0x18(%rbp),%edx
  1f:	8b 4d e4             	mov    -0x1c(%rbp),%ecx
  22:	83 c4 04             	add    $0x4,%esp
  25:	e9 c8 fc ff ff       	jmp    0xfffffffffffffcf2
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	89 f9                	mov    %edi,%ecx
  2e:	89 da                	mov    %ebx,%edx
  30:	56                   	push   %rsi
  31:	e8 b5 00 00 00       	call   0xeb
  36:	83 c4 04             	add    $0x4,%esp
  39:	e9 87 fd ff ff       	jmp    0xfffffffffffffdc5
  3e:	8b                   	.byte 0x8b
  3f:	45                   	rex.RB

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	89 f9                	mov    %edi,%ecx
   4:	89 da                	mov    %ebx,%edx
   6:	56                   	push   %rsi
   7:	e8 b5 00 00 00       	call   0xc1
   c:	83 c4 04             	add    $0x4,%esp
   f:	e9 87 fd ff ff       	jmp    0xfffffffffffffd9b
  14:	8b                   	.byte 0x8b
  15:	45                   	rex.RB
[  122.518827][  T251] EAX: 80000000 EBX: 00000000 ECX: ecd11e00 EDX: eceaf3c0
[  122.519822][  T251] ESI: 80000040 EDI: ecf11cdc EBP: ecf11cb8 ESP: ecf11c8c
[  122.520643][  T251] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010046
[  122.521539][  T251] CR0: 80050033 CR2: 80000040 CR3: 2cc98000 CR4: 00040690
[  122.522448][  T251] Call Trace:
[ 122.522885][ T251] ? show_regs (arch/x86/kernel/dumpstack.c:478) 
[ 122.523435][ T251] ? __warn (kernel/panic.c:240 kernel/panic.c:694) 
[ 122.523958][ T251] ? do_user_addr_fault (arch/x86/mm/fault.c:1308) 
[ 122.524553][ T251] ? report_bug (lib/bug.c:199) 
[ 122.525103][ T251] ? exc_overflow (arch/x86/kernel/traps.c:252) 
[ 122.525624][ T251] ? handle_bug (arch/x86/kernel/traps.c:239) 
[ 122.526180][ T251] ? exc_invalid_op (arch/x86/kernel/traps.c:260) 
[ 122.526753][ T251] ? handle_exception (arch/x86/entry/entry_32.S:1054) 
[ 122.527347][ T251] ? xas_create_range (lib/xarray.c:729) 
[ 122.527986][ T251] ? xas_create_range (lib/xarray.c:729) 
[ 122.528578][ T251] ? exc_overflow (arch/x86/kernel/traps.c:252) 
[ 122.529134][ T251] ? do_user_addr_fault (arch/x86/mm/fault.c:1308) 
[ 122.529801][ T251] ? exc_overflow (arch/x86/kernel/traps.c:252) 
[ 122.530345][ T251] ? do_user_addr_fault (arch/x86/mm/fault.c:1308) 
[ 122.530992][ T251] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67) 
[ 122.531680][ T251] exc_page_fault (arch/x86/include/asm/irqflags.h:19 arch/x86/include/asm/irqflags.h:67 arch/x86/include/asm/irqflags.h:127 arch/x86/mm/fault.c:1519 arch/x86/mm/fault.c:1569) 
[ 122.532252][ T251] ? pvclock_clocksource_read_nowd (arch/x86/mm/fault.c:1524) 
[ 122.533061][ T251] handle_exception (arch/x86/entry/entry_32.S:1054) 
[ 122.533679][ T251] EIP: string (lib/vsprintf.c:646) 
[ 122.534266][ T251] Code: 54 24 04 85 f6 75 4b 31 f6 eb 79 89 04 24 89 54 24 04 c1 fa 10 74 78 31 ff eb 0c 90 90 90 90 90 90 90 47 39 fa 74 6e 8d 34 39 <0f> b6 04 3b 84 c0 74 69 3b 74 24 08 73 ea 88 06 eb e6 89 c6 0f b7
All code
========
   0:	54                   	push   %rsp
   1:	24 04                	and    $0x4,%al
   3:	85 f6                	test   %esi,%esi
   5:	75 4b                	jne    0x52
   7:	31 f6                	xor    %esi,%esi
   9:	eb 79                	jmp    0x84
   b:	89 04 24             	mov    %eax,(%rsp)
   e:	89 54 24 04          	mov    %edx,0x4(%rsp)
  12:	c1 fa 10             	sar    $0x10,%edx
  15:	74 78                	je     0x8f
  17:	31 ff                	xor    %edi,%edi
  19:	eb 0c                	jmp    0x27
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	47 39 fa             	rex.RXB cmp %r15d,%r10d
  25:	74 6e                	je     0x95
  27:	8d 34 39             	lea    (%rcx,%rdi,1),%esi
  2a:*	0f b6 04 3b          	movzbl (%rbx,%rdi,1),%eax		<-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	74 69                	je     0x9b
  32:	3b 74 24 08          	cmp    0x8(%rsp),%esi
  36:	73 ea                	jae    0x22
  38:	88 06                	mov    %al,(%rsi)
  3a:	eb e6                	jmp    0x22
  3c:	89 c6                	mov    %eax,%esi
  3e:	0f                   	.byte 0xf
  3f:	b7                   	.byte 0xb7

Code starting with the faulting instruction
===========================================
   0:	0f b6 04 3b          	movzbl (%rbx,%rdi,1),%eax
   4:	84 c0                	test   %al,%al
   6:	74 69                	je     0x71
   8:	3b 74 24 08          	cmp    0x8(%rsp),%esi
   c:	73 ea                	jae    0xfffffffffffffff8
   e:	88 06                	mov    %al,(%rsi)
  10:	eb e6                	jmp    0xfffffffffffffff8
  12:	89 c6                	mov    %eax,%esi
  14:	0f                   	.byte 0xf
  15:	b7                   	.byte 0xb7


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240412/202404121129.c53d5406-oliver.sang@intel.com


-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki