Re: [PATCH] mm: vma remove the redundant avc binded with old folio

zhiguojiang <justinjiang@xxxxxxxx> · Fri, 23 Aug 2024 23:04:26 +0800

在 2024/8/23 22:04, zhiguojiang 写道:

在 2024/8/23 10:33, kernel test robot 写道:
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Hello,

kernel test robot noticed "WARNING:at_mm/rmap.c:#unlink_anon_vmas" on:

commit: ae307233d6efc18c3d6015b127b099450ca8588e ("[PATCH] mm: vma 
remove the redundant avc binded with old folio")
url: 
https://github.com/intel-lab-lkp/linux/commits/Zhiguo-Jiang/mm-vma-remove-the-redundant-avc-binded-with-old-folio/20240820-223531
base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git 
mm-everything
patch link: 
https://lore.kernel.org/all/20240820143359.199-1-justinjiang@xxxxxxxx/
patch subject: [PATCH] mm: vma remove the redundant avc binded with 
old folio

in testcase: boot

compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 
-m 16G

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

+----------------------------------------+------------+------------+
|                                        | 75bee94793 | ae307233d6 |
+----------------------------------------+------------+------------+
| WARNING:at_mm/rmap.c:#unlink_anon_vmas | 0          | 6          |
| RIP:unlink_anon_vmas                   | 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@xxxxxxxxx>
| Closes: 
https://lore.kernel.org/oe-lkp/202408230938.43f55b4-lkp@xxxxxxxxx
Fix the issue, please help to review again.
https://lore.kernel.org/linux-mm/20240823140139.263-1-justinjiang@xxxxxxxx/T/#u 

Sorry, please help to review this patch.
https://lore.kernel.org/linux-mm/20240823150206.565-1-justinjiang@xxxxxxxx/T/#u

Thanks
Zhiguo

Thanks
Zhiguo

[   36.655884][  T197] ------------[ cut here ]------------
[ 36.656843][ T197] WARNING: CPU: 1 PID: 197 at mm/rmap.c:443 
unlink_anon_vmas (mm/rmap.c:443 (discriminator 1))
[   36.658183][  T197] Modules linked in: sg ata_piix libata 
crc32_pclmul crc32c_intel scsi_mod polyval_clmulni polyval_generic 
ghash_clmulni_intel sha512_ssse3 aesni_intel scsi_common cmdlinepart
[   36.660508][  T197] CPU: 1 UID: 0 PID: 197 Comm: lkp-bootstrap 
Tainted: G                T 6.11.0-rc3-00378-gae307233d6ef #1 
5ff8330b382acbcd2719e520175822ac6c64d0eb
[   36.662685][  T197] Tainted: [T]=RANDSTRUCT
[ 36.663288][ T197] RIP: 0010:unlink_anon_vmas (mm/rmap.c:443 
(discriminator 1))
[ 36.668434][ T197] Code: 7f fe ff ff 48 83 c4 28 5b 5d 41 5c 41 5d 
41 5e 41 5f 31 c0 31 d2 31 c9 31 f6 31 ff 45 31 c0 45 31 c9 c3 90 0f 
0b 90 eb ad 90 <0f> 0b 90 eb 82 90 0f 0b 90 48 8d 7e 08 e8 2d a2 bf 
ff e9 ca fc ff
All code
========
    0:   7f fe                   jg     0x0
    2:   ff                      (bad)
    3:   ff 48 83                decl   -0x7d(%rax)
    6:   c4                      (bad)
    7:   28 5b 5d                sub    %bl,0x5d(%rbx)
    a:   41 5c                   pop    %r12
    c:   41 5d                   pop    %r13
    e:   41 5e                   pop    %r14
   10:   41 5f                   pop    %r15
   12:   31 c0                   xor    %eax,%eax
   14:   31 d2                   xor    %edx,%edx
   16:   31 c9                   xor    %ecx,%ecx
   18:   31 f6                   xor    %esi,%esi
   1a:   31 ff                   xor    %edi,%edi
   1c:   45 31 c0                xor    %r8d,%r8d
   1f:   45 31 c9                xor    %r9d,%r9d
   22:   c3                      ret
   23:   90                      nop
   24:   0f 0b                   ud2
   26:   90                      nop
   27:   eb ad                   jmp    0xffffffffffffffd6
   29:   90                      nop
   2a:*  0f 0b                   ud2             <-- trapping 
instruction
   2c:   90                      nop
   2d:   eb 82                   jmp    0xffffffffffffffb1
   2f:   90                      nop
   30:   0f 0b                   ud2
   32:   90                      nop
   33:   48 8d 7e 08             lea    0x8(%rsi),%rdi
   37:   e8 2d a2 bf ff          call   0xffffffffffbfa269
   3c:   e9                      .byte 0xe9
   3d:   ca fc ff                lret   $0xfffc

Code starting with the faulting instruction
===========================================
    0:   0f 0b                   ud2
    2:   90                      nop
    3:   eb 82                   jmp    0xffffffffffffff87
    5:   90                      nop
    6:   0f 0b                   ud2
    8:   90                      nop
    9:   48 8d 7e 08             lea    0x8(%rsi),%rdi
    d:   e8 2d a2 bf ff          call   0xffffffffffbfa23f
   12:   e9                      .byte 0xe9
   13:   ca fc ff                lret   $0xfffc
[   36.671148][  T197] RSP: 0000:ffffc900019ffad8 EFLAGS: 00010202
[   36.671931][  T197] RAX: 1ffff1102e73f0bf RBX: ffff888173c55ab0 
RCX: 0000000000000000
[   36.672880][  T197] RDX: 1ffff110241d68e2 RSI: 0000000000000000 
RDI: ffff8881739f85f8
[   36.673933][  T197] RBP: ffff888120eb4700 R08: 0000000000000000 
R09: 0000000000000000
[   36.675002][  T197] R10: 0000000000000000 R11: 0000000000000000 
R12: ffff8881739f8550
[   36.676082][  T197] R13: ffff888173c55aa0 R14: dffffc0000000000 
R15: ffff888120eb4710
[   36.677134][  T197] FS:  0000000000000000(0000) 
GS:ffff8883af300000(0000) knlGS:0000000000000000
[   36.678328][  T197] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   36.679207][  T197] CR2: 000000005663e33c CR3: 000000012021c000 
CR4: 00000000000406b0
[   36.680251][  T197] Call Trace:
[   36.680681][  T197]  <TASK>
[ 36.681079][ T197] ? __warn (kernel/panic.c:735)
[ 36.681682][ T197] ? unlink_anon_vmas (mm/rmap.c:443 (discriminator 1))
[ 36.682312][ T197] ? report_bug (lib/bug.c:180 lib/bug.c:219)
[ 36.682920][ T197] ? handle_bug (arch/x86/kernel/traps.c:239)
[ 36.683494][ T197] ? exc_invalid_op (arch/x86/kernel/traps.c:260 
(discriminator 1))
[ 36.684125][ T197] ? asm_exc_invalid_op 
(arch/x86/include/asm/idtentry.h:621)
[ 36.684804][ T197] ? unlink_anon_vmas (mm/rmap.c:443 (discriminator 1))
[ 36.685501][ T197] ? unlink_anon_vmas (mm/rmap.c:400)
[ 36.686185][ T197] free_pgtables (mm/memory.c:410)
[ 36.686819][ T197] ? free_pgd_range (mm/memory.c:367)
[ 36.687466][ T197] ? preempt_count_add (include/linux/ftrace.h:976 
kernel/sched/core.c:5634 kernel/sched/core.c:5659)
[ 36.688179][ T197] exit_mmap (mm/mmap.c:1934)
[ 36.688758][ T197] ? trace_contention_end 
(include/trace/events/lock.h:122 (discriminator 52))
[ 36.689496][ T197] ? do_vma_munmap (mm/mmap.c:1895)
[ 36.690125][ T197] ? __mutex_lock 
(arch/x86/include/asm/preempt.h:103 kernel/locking/mutex.c:618 
kernel/locking/mutex.c:752)
[ 36.690779][ T197] ? __mutex_unlock_slowpath 
(arch/x86/include/asm/atomic64_64.h:101 
include/linux/atomic/atomic-arch-fallback.h:4329 
include/linux/atomic/atomic-long.h:1506 
include/linux/atomic/atomic-instrumented.h:4481 
kernel/locking/mutex.c:929)
[ 36.691585][ T197] __mmput (kernel/fork.c:1346)
[ 36.692143][ T197] exit_mm (kernel/exit.c:572)
[ 36.692699][ T197] do_exit (arch/x86/include/asm/jump_label.h:27 
include/linux/jump_label.h:207 include/trace/events/sched.h:333 
kernel/exit.c:930)
[ 36.693256][ T197] ? do_raw_spin_lock 
(arch/x86/include/asm/atomic.h:107 
include/linux/atomic/atomic-arch-fallback.h:2170 
include/linux/atomic/atomic-instrumented.h:1302 
include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116)
[ 36.693947][ T197] ? stack_not_used (kernel/exit.c:878)
[ 36.694605][ T197] ? _raw_spin_unlock_irq 
(arch/x86/include/asm/irqflags.h:42 
arch/x86/include/asm/irqflags.h:97 
include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202)
[ 36.695304][ T197] do_group_exit (kernel/exit.c:1069)
[ 36.695908][ T197] __ia32_sys_exit_group (kernel/exit.c:1097)
[ 36.696561][ T197] ia32_sys_call (??:?)
[ 36.697142][ T197] do_int80_emulation (arch/x86/entry/common.c:165 
arch/x86/entry/common.c:253)
[ 36.697852][ T197] asm_int80_emulation 
(arch/x86/include/asm/idtentry.h:626)
[   36.698504][  T197] RIP: 0023:0xf7f03092
[ 36.699039][ T197] Code: Unable to access opcode bytes at 0xf7f03068.

Code starting with the faulting instruction
===========================================
[   36.699967][  T197] RSP: 002b:00000000ffcfddd8 EFLAGS: 00000296 
ORIG_RAX: 00000000000000fc
[   36.701055][  T197] RAX: ffffffffffffffda RBX: 0000000000000000 
RCX: 0000000003323d2f
[   36.702120][  T197] RDX: 00000000ffcfde00 RSI: 0000000056633734 
RDI: 00000000f7ef8000
[   36.703147][  T197] RBP: 00000000ffcfdef8 R08: 0000000000000000 
R09: 0000000000000000
[   36.704165][  T197] R10: 0000000000000000 R11: 0000000000000000 
R12: 0000000000000000
[   36.705185][  T197] R13: 0000000000000000 R14: 0000000000000000 
R15: 0000000000000000
[   36.706281][  T197]  </TASK>
[   36.706698][  T197] irq event stamp: 10051
[ 36.707257][ T197] hardirqs last enabled at (10059): console_unlock 
(arch/x86/include/asm/irqflags.h:26 
arch/x86/include/asm/irqflags.h:87 
arch/x86/include/asm/irqflags.h:147 kernel/printk/printk.c:341 
kernel/printk/printk.c:2801 kernel/printk/printk.c:3120)
[ 36.708455][ T197] hardirqs last disabled at (10066): console_unlock 
(kernel/printk/printk.c:339 kernel/printk/printk.c:2801 
kernel/printk/printk.c:3120)
[ 36.709660][ T197] softirqs last enabled at (10006): handle_softirqs 
(arch/x86/include/asm/preempt.h:26 kernel/softirq.c:401 
kernel/softirq.c:582)
[ 36.710805][ T197] softirqs last disabled at (9997): irq_exit_rcu 
(kernel/softirq.c:589 kernel/softirq.c:428 kernel/softirq.c:637 
kernel/softirq.c:649)
[   36.711941][  T197] ---[ end trace 0000000000000000 ]---

The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240823/202408230938.43f55b4-lkp@xxxxxxxxx 

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https://github.com/intel/lkp-tests/wiki