divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5778 Comm: syz.4.350 Not tainted 6.1.140-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:do_journal_end+0x12d4/0x4790 fs/reiserfs/journal.c:4093
Code: 0f b6 04 28 84 c0 0f 85 f0 2f 00 00 49 8d 44 1c 01 4c 89 f1 48 c1 e9 03 42 0f b6 0c 29 84 c9 0f 85 f7 2f 00 00 41 8b 0f 31 d2 <48> f7 f1 49 89 d6 4c 03 74 24 40 48 8b 84 24 f0 00 00 00 42 80 3c
RSP: 0018:ffffc9000dcc73c0 EFLAGS: 00010246
RAX: 0000000000000004 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88804c070000
RBP: ffffc9000dcc7650 R08: dffffc0000000000 R09: ffff88804c06f000
R10: 0000000000000000 R11: 0000000000000200 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888051944017 R15: ffff888051944014
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7aad600218 CR3: 00000000294e2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_journal_release+0x4eb/0x540 fs/reiserfs/journal.c:1940
 journal_release+0x1b/0x30 fs/reiserfs/journal.c:1971
 reiserfs_put_super+0x21e/0x480 fs/reiserfs/super.c:616
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1186
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x936/0x2400 kernel/exit.c:871
 do_group_exit+0x217/0x2d0 kernel/exit.c:1021
 get_signal+0x1272/0x1350 kernel/signal.c:2871
 arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7b665c1225
Code: Unable to access opcode bytes at 0x7f7b665c11fb.
RSP: 002b:00007f7b6731bf80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f7b667b5fa0 RCX: 00007f7b665c1225
RDX: 00007f7b6731bfc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f7b66610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7b667b5fa0 R15: 00007fffba457b68
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:do_journal_end+0x12d4/0x4790 fs/reiserfs/journal.c:4093
Code: 0f b6 04 28 84 c0 0f 85 f0 2f 00 00 49 8d 44 1c 01 4c 89 f1 48 c1 e9 03 42 0f b6 0c 29 84 c9 0f 85 f7 2f 00 00 41 8b 0f 31 d2 <48> f7 f1 49 89 d6 4c 03 74 24 40 48 8b 84 24 f0 00 00 00 42 80 3c
RSP: 0018:ffffc9000dcc73c0 EFLAGS: 00010246
RAX: 0000000000000004 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88804c070000
RBP: ffffc9000dcc7650 R08: dffffc0000000000 R09: ffff88804c06f000
R10: 0000000000000000 R11: 0000000000000200 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888051944017 R15: ffff888051944014
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7aad600218 CR3: 00000000294e2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
   4:	84 c0                	test   %al,%al
   6:	0f 85 f0 2f 00 00    	jne    0x2ffc
   c:	49 8d 44 1c 01       	lea    0x1(%r12,%rbx,1),%rax
  11:	4c 89 f1             	mov    %r14,%rcx
  14:	48 c1 e9 03          	shr    $0x3,%rcx
  18:	42 0f b6 0c 29       	movzbl (%rcx,%r13,1),%ecx
  1d:	84 c9                	test   %cl,%cl
  1f:	0f 85 f7 2f 00 00    	jne    0x301c
  25:	41 8b 0f             	mov    (%r15),%ecx
  28:	31 d2                	xor    %edx,%edx
* 2a:	48 f7 f1             	div    %rcx <-- trapping instruction
  2d:	49 89 d6             	mov    %rdx,%r14
  30:	4c 03 74 24 40       	add    0x40(%rsp),%r14
  35:	48 8b 84 24 f0 00 00 	mov    0xf0(%rsp),%rax
  3c:	00
  3d:	42                   	rex.X
  3e:	80                   	.byte 0x80
  3f:	3c                   	.byte 0x3c