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Date: Tue, 11 Jun 2024 14:09:25 +0800
From: kernel test robot <oliver.sang@intel.com>
To: Ingo Molnar <mingo@kernel.org>
CC: <oe-lkp@lists.linux.dev>, <lkp@intel.com>, <linux-kernel@vger.kernel.org>,
	<x86@kernel.org>, Oleg Nesterov <oleg@redhat.com>, Andy Lutomirski
	<luto@kernel.org>, Borislav Petkov <bp@alien8.de>, Fenghua Yu
	<fenghua.yu@intel.com>, "H. Peter Anvin" <hpa@zytor.com>, Linus Torvalds
	<torvalds@linux-foundation.org>, Dave Hansen <dave.hansen@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>, Uros Bizjak <ubizjak@gmail.com>,
	<oliver.sang@intel.com>
Subject: [tip:WIP.x86/fpu] [x86/fpu]  052ffa1364:
 WARNING:at_arch/x86/mm/extable.c:#fixup_exception
Message-ID: <202406111352.84c1bcbe-oliver.sang@intel.com>
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Hello,

kernel test robot noticed "WARNING:at_arch/x86/mm/extable.c:#fixup_exception" on:

commit: 052ffa1364f57555fad862dc2094091b7cec9b93 ("x86/fpu: Remove the thread::fpu pointer")
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git WIP.x86/fpu

in testcase: boot

compiler: gcc-13
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

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


as below table, both 052ffa1364 and its parent have same issue such like
kernel_BUG_at_mm/usercopy.c
Oops:invalid_opcode:#[##]PREEMPT_SMP
EIP:usercopy_abort
Kernel_panic-not_syncing:Fatal_exception

but this commit introduces WARNING:at_arch/x86/mm/extable.c:#fixup_exception

+---------------------------------------------------+------------+------------+
|                                                   | 4f4a9b3993 | 052ffa1364 |
+---------------------------------------------------+------------+------------+
| boot_failures                                     | 6          | 6          |
| kernel_BUG_at_mm/usercopy.c                       | 6          | 6          |
| Oops:invalid_opcode:#[##]PREEMPT_SMP              | 6          | 6          |
| EIP:usercopy_abort                                | 6          | 6          |
| Kernel_panic-not_syncing:Fatal_exception          | 6          | 6          |
| WARNING:at_arch/x86/mm/extable.c:#fixup_exception | 0          | 6          |
| EIP:fixup_exception                               | 0          | 6          |
| EIP:restore_fpregs_from_fpstate                   | 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/202406111352.84c1bcbe-oliver.sang@intel.com


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240611/202406111352.84c1bcbe-oliver.sang@intel.com


[    3.372028][   T64] ------------[ cut here ]------------
[    3.372802][   T64] Bad FPU state detected at restore_fpregs_from_fpstate+0x38/0x70, reinitializing FPU registers.
[    3.372818][   T64] WARNING: CPU: 0 PID: 64 at arch/x86/mm/extable.c:127 fixup_exception+0x405/0x41c
[    3.375482][   T64] Modules linked in:
[    3.376062][   T64] CPU: 0 PID: 64 Comm: modprobe Not tainted 6.10.0-rc2-00004-g052ffa1364f5 #1
[    3.377299][   T64] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[    3.378863][   T64] EIP: fixup_exception+0x405/0x41c
[    3.379541][   T64] Code: c2 e9 a2 fd ff ff 0f 0b ba 48 c9 fa c2 e9 e7 fd ff ff 89 44 24 04 b2 01 c7 04 24 98 a3 77 c2 88 15 f8 7c e2 c2 e8 0f 2d 01 00 <0f> 0b eb 9a 0f 0b b8 94 e4 97 c2 e8 17 97 6e 00 cc cc cc cc cc cc
[    3.382186][   T64] EAX: 0000005e EBX: c28cd540 ECX: 00000234 EDX: c2cad1a4
[    3.383617][   T64] ESI: ed6cdee4 EDI: 0000000d EBP: ed6cde50 ESP: ed6cddd4
[    3.384683][   T64] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010086
[    3.385916][   T64] CR0: 80050033 CR2: bf9717ab CR3: 2d6ad000 CR4: 00040690
[    3.387245][   T64] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[    3.388306][   T64] DR6: fffe0ff0 DR7: 00000400
[    3.389074][   T64] Call Trace:
[    3.389688][   T64]  ? show_regs+0x72/0x7c
[    3.390293][   T64]  ? fixup_exception+0x405/0x41c
[    3.390961][   T64]  ? __warn+0x88/0x1a0
[    3.391576][   T64]  ? fixup_exception+0x405/0x41c
[    3.392323][   T64]  ? fixup_exception+0x405/0x41c
[    3.393045][   T64]  ? report_bug+0x182/0x1ac
[    3.393759][   T64]  ? exc_overflow+0x50/0x50
[    3.394377][   T64]  ? handle_bug+0x2d/0x50
[    3.394969][   T64]  ? exc_invalid_op+0x28/0x7c
[    3.395643][   T64]  ? console_unlock+0x64/0x110
[    3.396286][   T64]  ? handle_exception+0x150/0x150
[    3.396987][   T64]  ? print_lock_class_header+0x157/0x180
[    3.397979][   T64]  ? follow_phys+0x140/0x140
[    3.398745][   T64]  ? exc_overflow+0x50/0x50
[    3.399484][   T64]  ? fixup_exception+0x405/0x41c
[    3.400220][   T64]  ? follow_phys+0x140/0x140
[    3.400898][   T64]  ? exc_overflow+0x50/0x50
[    3.401667][   T64]  ? fixup_exception+0x405/0x41c
[    3.402424][   T64]  ? restore_fpregs_from_fpstate+0x38/0x70
[    3.403336][   T64]  ? 0xc1000000
[    3.403946][   T64]  ? lock_acquire+0x241/0x284
[    3.404711][   T64]  ? should_fail+0xa/0xc
[    3.405464][   T64]  ? _copy_to_user+0x4b/0x68
[    3.406171][   T64]  ? create_elf_tables+0x667/0x6b8
[    3.406961][   T64]  ? lock_release+0xe1/0x124
[    3.407656][   T64]  ? exc_bounds+0xd4/0xd4
[    3.408280][   T64]  exc_general_protection+0x13d/0x2f0
[    3.409135][   T64]  ? finalize_exec+0x50/0x60
[    3.409929][   T64]  ? exc_bounds+0xd4/0xd4
[    3.410629][   T64]  handle_exception+0x150/0x150
[    3.411416][   T64] EIP: restore_fpregs_from_fpstate+0x38/0x70
[    3.412303][   T64] Code: 7d fc 89 ca eb 09 cc cc cc db e2 0f 77 db 03 3e 8d 74 26 00 8b 3d ec a1 84 c2 8b 0d e8 a1 84 c2 21 fa 8d 7b 40 21 c8 0f ae 2f <8b> 5d f8 8b 7d fc 89 ec 5d c3 8d b6 00 00 00 00 3e 8d 74 26 00 0f
[    3.414918][   T64] EAX: 00000007 EBX: c4a7b0e0 ECX: 00000007 EDX: 00000000
[    3.415869][   T64] ESI: c4a7b0a0 EDI: c4a7b120 EBP: ed6cdf48 ESP: ed6cdf40
[    3.416754][   T64] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010002
[    3.417835][   T64]  ? exc_bounds+0xd4/0xd4
[    3.418450][   T64]  ? exc_bounds+0xd4/0xd4
[    3.419077][   T64]  ? restore_fpregs_from_fpstate+0x35/0x70
[    3.419844][   T64]  switch_fpu_return+0x50/0x124
[    3.420548][   T64]  syscall_exit_to_user_mode+0x1a1/0x218
[    3.421473][   T64]  ? call_usermodehelper_exec_async+0xbe/0x1a8
[    3.422433][   T64]  ? call_usermodehelper+0x58/0x58
[    3.423186][   T64]  ret_from_fork+0x23/0x44
[    3.423881][   T64]  ? call_usermodehelper+0x58/0x58
[    3.424616][   T64]  ret_from_fork_asm+0x12/0x18
[    3.425367][   T64]  entry_INT80_32+0x10d/0x10d
[    3.426064][   T64] EIP: 0xb7f6ba14
[    3.426610][   T64] Code: Unable to access opcode bytes at 0xb7f6b9ea.
[    3.427586][   T64] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000
[    3.428674][   T64] ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: bf9716b0
[    3.429755][   T64] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000200
[    3.430823][   T64] irq event stamp: 0
[    3.431340][   T64] hardirqs last  enabled at (0): [<00000000>] 0x0
[    3.432112][   T64] hardirqs last disabled at (0): [<c107c35b>] copy_process+0x913/0x1930
[    3.433269][   T64] softirqs last  enabled at (0): [<c107c35b>] copy_process+0x913/0x1930
[    3.434387][   T64] softirqs last disabled at (0): [<00000000>] 0x0
[    3.435251][   T64] ---[ end trace 0000000000000000 ]---
[    3.451580][   T64] modprobe (64) used greatest stack depth: 5860 bytes left


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