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* [syzbot] linux-next boot error: BUG: unable to handle kernel paging request in corrupted
@ 2022-11-01 14:31 syzbot
  2022-11-01 14:47 ` Dmitry Vyukov
  0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2022-11-01 14:31 UTC (permalink / raw)
  To: axboe, linux-block, linux-kernel, linux-next, sfr, syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    e9d267f752f8 Add linux-next specific files for 20221101
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13c8fdb6880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7d67fcb6fc8245f
dashboard link: https://syzkaller.appspot.com/bug?extid=4d9bcd45d5ca0a476cf7
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a6c3145cf385/disk-e9d267f7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3f34d7fed0ff/vmlinux-e9d267f7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/279836b50e84/bzImage-e9d267f7.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4d9bcd45d5ca0a476cf7@syzkaller.appspotmail.com

floppy0: no floppy controllers found
work still pending
BUG: unable to handle page fault for address: ffffed1018000000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 23ffee067 P4D 23ffee067 PUD 13fff5067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.0-rc3-next-20221101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Workqueue: events_unbound async_run_entry_fn
RIP: 0010:memset_orig-0x7/0xb0
Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01
RSP: 0000:ffffc90000107a48 EFLAGS: 00010287
RAX: dffffc0000000000 RBX: ffff88801cd34100 RCX: fffff11014430738
RDX: fffff11028a89f18 RSI: 0000000000000000 RDI: ffffed1018000000
RBP: ffff88814544f8c0 R08: 0000000000000005 R09: ffffed10039a6820
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff81a702a0
R13: ffff88814544f8c0 R14: 0000000000000007 R15: ffff88801cd34100
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1018000000 CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kasan_unpoison mm/kasan/shadow.c:138 [inline]
 kasan_unpoison+0x40/0x70 mm/kasan/shadow.c:115
 kasan_unpoison_range include/linux/kasan.h:112 [inline]
 kasan_unpoison_element mm/mempool.c:115 [inline]
 remove_element mm/mempool.c:134 [inline]
 mempool_exit+0x1c4/0x320 mm/mempool.c:153
 bioset_exit+0x2d3/0x640 block/bio.c:1655
 disk_release+0x143/0x480 block/genhd.c:1169
 device_release+0x9f/0x240 drivers/base/core.c:2330
 kobject_cleanup lib/kobject.c:673 [inline]
 kobject_release lib/kobject.c:704 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1be/0x4c0 lib/kobject.c:721
 put_device+0x1b/0x30 drivers/base/core.c:3624
 blk_mark_disk_dead-0xf/0x60
 do_floppy_init drivers/block/floppy.c:4756 [inline]
 floppy_async_init+0x2169/0x21ca drivers/block/floppy.c:4765
 async_run_entry_fn+0x98/0x530 kernel/async.c:127
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:
CR2: ffffed1018000000
---[ end trace 0000000000000000 ]---
RIP: 0010:memset_orig-0x7/0xb0
Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01
RSP: 0000:ffffc90000107a48 EFLAGS: 00010287
RAX: dffffc0000000000 RBX: ffff88801cd34100 RCX: fffff11014430738
RDX: fffff11028a89f18 RSI: 0000000000000000 RDI: ffffed1018000000
RBP: ffff88814544f8c0 R08: 0000000000000005 R09: ffffed10039a6820
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff81a702a0
R13: ffff88814544f8c0 R14: 0000000000000007 R15: ffff88801cd34100
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1018000000 CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c1 e9 03             	shr    $0x3,%ecx
   3:	40 0f b6 f6          	movzbl %sil,%esi
   7:	48 b8 01 01 01 01 01 	movabs $0x101010101010101,%rax
   e:	01 01 01
  11:	48 0f af c6          	imul   %rsi,%rax
  15:	f3 48 ab             	rep stos %rax,%es:(%rdi)
  18:	89 d1                	mov    %edx,%ecx
  1a:	f3 aa                	rep stos %al,%es:(%rdi)
  1c:	4c 89 c8             	mov    %r9,%rax
  1f:	c3                   	retq
  20:	90                   	nop
  21:	49 89 f9             	mov    %rdi,%r9
  24:	40 88 f0             	mov    %sil,%al
  27:	48 89 d1             	mov    %rdx,%rcx
* 2a:	f3 aa                	rep stos %al,%es:(%rdi) <-- trapping instruction
  2c:	4c 89 c8             	mov    %r9,%rax
  2f:	c3                   	retq
  30:	90                   	nop
  31:	49 89 fa             	mov    %rdi,%r10
  34:	40 0f b6 ce          	movzbl %sil,%ecx
  38:	48                   	rex.W
  39:	b8 01 01 01 01       	mov    $0x1010101,%eax
  3e:	01 01                	add    %eax,(%rcx)


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

^ permalink raw reply	[flat|nested] 2+ messages in thread
* Re: [syzbot] linux-next boot error: BUG: unable to handle kernel paging request in corrupted
  2022-11-01 14:31 [syzbot] linux-next boot error: BUG: unable to handle kernel paging request in corrupted syzbot
@ 2022-11-01 14:47 ` Dmitry Vyukov
  0 siblings, 0 replies; 2+ messages in thread
From: Dmitry Vyukov @ 2022-11-01 14:47 UTC (permalink / raw)
  To: syzbot; +Cc: axboe, linux-block, linux-kernel, linux-next, sfr, syzkaller-bugs

On Tue, 1 Nov 2022 at 07:31, syzbot
<syzbot+4d9bcd45d5ca0a476cf7@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    e9d267f752f8 Add linux-next specific files for 20221101
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=13c8fdb6880000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=7d67fcb6fc8245f
> dashboard link: https://syzkaller.appspot.com/bug?extid=4d9bcd45d5ca0a476cf7
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/a6c3145cf385/disk-e9d267f7.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/3f34d7fed0ff/vmlinux-e9d267f7.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/279836b50e84/bzImage-e9d267f7.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+4d9bcd45d5ca0a476cf7@syzkaller.appspotmail.com
>
> floppy0: no floppy controllers found
> work still pending
> BUG: unable to handle page fault for address: ffffed1018000000
> #PF: supervisor write access in kernel mode
> #PF: error_code(0x0002) - not-present page
> PGD 23ffee067 P4D 23ffee067 PUD 13fff5067 PMD 0
> Oops: 0002 [#1] PREEMPT SMP KASAN
> CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.0-rc3-next-20221101-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
> Workqueue: events_unbound async_run_entry_fn

Besides the crash in bioset_exit() there is some issue with kallsyms

\/\/\/\/\/\/

> RIP: 0010:memset_orig-0x7/0xb0

It gives a negative offset from memset_orig. But that's memset_erms symbol:

$ nm -nS vmlinux-6fbda10e | grep ffffffff895869
ffffffff89586900 000000000000002f T __memset
ffffffff89586930 000000000000000f t memset_erms
ffffffff89586940 00000000000000ac t memset_orig
ffffffff895869f0 000000000000006e T num_digits

$ objdump --disassemble=memset_erms vmlinux-6fbda10e
ffffffff89586930 <memset_erms>:
ffffffff89586930: 49 89 f9              mov    %rdi,%r9
ffffffff89586933: 40 88 f0              mov    %sil,%al
ffffffff89586936: 48 89 d1              mov    %rdx,%rcx
ffffffff89586939: f3 aa                rep stos %al,%es:(%rdi)
ffffffff8958693b: 4c 89 c8              mov    %r9,%rax
ffffffff8958693e: c3                    ret


> Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01
> RSP: 0000:ffffc90000107a48 EFLAGS: 00010287
> RAX: dffffc0000000000 RBX: ffff88801cd34100 RCX: fffff11014430738
> RDX: fffff11028a89f18 RSI: 0000000000000000 RDI: ffffed1018000000
> RBP: ffff88814544f8c0 R08: 0000000000000005 R09: ffffed10039a6820
> R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff81a702a0
> R13: ffff88814544f8c0 R14: 0000000000000007 R15: ffff88801cd34100
> FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffed1018000000 CR3: 000000000bc8e000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>  <TASK>
>  kasan_unpoison mm/kasan/shadow.c:138 [inline]
>  kasan_unpoison+0x40/0x70 mm/kasan/shadow.c:115
>  kasan_unpoison_range include/linux/kasan.h:112 [inline]
>  kasan_unpoison_element mm/mempool.c:115 [inline]
>  remove_element mm/mempool.c:134 [inline]
>  mempool_exit+0x1c4/0x320 mm/mempool.c:153
>  bioset_exit+0x2d3/0x640 block/bio.c:1655
>  disk_release+0x143/0x480 block/genhd.c:1169
>  device_release+0x9f/0x240 drivers/base/core.c:2330
>  kobject_cleanup lib/kobject.c:673 [inline]
>  kobject_release lib/kobject.c:704 [inline]
>  kref_put include/linux/kref.h:65 [inline]
>  kobject_put+0x1be/0x4c0 lib/kobject.c:721
>  put_device+0x1b/0x30 drivers/base/core.c:3624
>  blk_mark_disk_dead-0xf/0x60
>  do_floppy_init drivers/block/floppy.c:4756 [inline]
>  floppy_async_init+0x2169/0x21ca drivers/block/floppy.c:4765
>  async_run_entry_fn+0x98/0x530 kernel/async.c:127
>  process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
>  worker_thread+0x665/0x1080 kernel/workqueue.c:2436
>  kthread+0x2e4/0x3a0 kernel/kthread.c:376
>  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
>  </TASK>
> Modules linked in:
> CR2: ffffed1018000000
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:memset_orig-0x7/0xb0
> Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01
> RSP: 0000:ffffc90000107a48 EFLAGS: 00010287
> RAX: dffffc0000000000 RBX: ffff88801cd34100 RCX: fffff11014430738
> RDX: fffff11028a89f18 RSI: 0000000000000000 RDI: ffffed1018000000
> RBP: ffff88814544f8c0 R08: 0000000000000005 R09: ffffed10039a6820
> R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff81a702a0
> R13: ffff88814544f8c0 R14: 0000000000000007 R15: ffff88801cd34100
> FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffed1018000000 CR3: 000000000bc8e000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> ----------------
> Code disassembly (best guess):
>    0:   c1 e9 03                shr    $0x3,%ecx
>    3:   40 0f b6 f6             movzbl %sil,%esi
>    7:   48 b8 01 01 01 01 01    movabs $0x101010101010101,%rax
>    e:   01 01 01
>   11:   48 0f af c6             imul   %rsi,%rax
>   15:   f3 48 ab                rep stos %rax,%es:(%rdi)
>   18:   89 d1                   mov    %edx,%ecx
>   1a:   f3 aa                   rep stos %al,%es:(%rdi)
>   1c:   4c 89 c8                mov    %r9,%rax
>   1f:   c3                      retq
>   20:   90                      nop
>   21:   49 89 f9                mov    %rdi,%r9
>   24:   40 88 f0                mov    %sil,%al
>   27:   48 89 d1                mov    %rdx,%rcx
> * 2a:   f3 aa                   rep stos %al,%es:(%rdi) <-- trapping instruction
>   2c:   4c 89 c8                mov    %r9,%rax
>   2f:   c3                      retq
>   30:   90                      nop
>   31:   49 89 fa                mov    %rdi,%r10
>   34:   40 0f b6 ce             movzbl %sil,%ecx
>   38:   48                      rex.W
>   39:   b8 01 01 01 01          mov    $0x1010101,%eax
>   3e:   01 01                   add    %eax,(%rcx)
>
>
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@googlegroups.com.
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
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^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2022-11-01 14:47 UTC | newest]

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2022-11-01 14:31 [syzbot] linux-next boot error: BUG: unable to handle kernel paging request in corrupted syzbot
2022-11-01 14:47 ` Dmitry Vyukov

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