divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4376 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:do_journal_end+0x12ee/0x4800 fs/reiserfs/journal.c:4093
Code: 0f b6 04 28 84 c0 0f 85 30 30 00 00 49 8d 44 1c 01 4c 89 f1 48 c1 e9 03 42 0f b6 0c 29 84 c9 0f 85 37 30 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:ffffc90003107480 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801cf74000
RBP: ffffc90003107710 R08: ffff88801cf74fff R09: ffff88801cf74000
R10: dffffc0000000000 R11: ffffed10039eea00 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888069c9c017 R15: ffff888069c9c014
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffee4f75fe8 CR3: 000000002eedd000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 reiserfs_sync_fs+0xe9/0x170 fs/reiserfs/super.c:78
 sync_filesystem+0xe6/0x220 fs/sync.c:56
 generic_shutdown_super+0x6b/0x340 fs/super.c:474
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x42c/0x4b0 fs/namespace.c:1191
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x982/0x2480 kernel/exit.c:880
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 get_signal+0x1272/0x1350 kernel/signal.c:2871
 arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 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:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f013759c0fc
Code: Unable to access opcode bytes at 0x7f013759c0d2.
RSP: 002b:00007ffc4eac2520 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: 0000000000000003 RBX: 00007f0137632120 RCX: 00007f013759c0fc
RDX: 0000000000090800 RSI: 00007ffc4eac36d0 RDI: 00000000ffffff9c
RBP: 00007ffc4eac36bc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffc4eac36d0
R13: 00007f0137632120 R14: 0000000000012b95 R15: 00007ffc4eac3710
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:do_journal_end+0x12ee/0x4800 fs/reiserfs/journal.c:4093
Code: 0f b6 04 28 84 c0 0f 85 30 30 00 00 49 8d 44 1c 01 4c 89 f1 48 c1 e9 03 42 0f b6 0c 29 84 c9 0f 85 37 30 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:ffffc90003107480 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801cf74000
RBP: ffffc90003107710 R08: ffff88801cf74fff R09: ffff88801cf74000
R10: dffffc0000000000 R11: ffffed10039eea00 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888069c9c017 R15: ffff888069c9c014
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000003392d18 CR3: 000000000c88e000 CR4: 00000000003506e0
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 30 30 00 00    	jne    0x303c
   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 37 30 00 00    	jne    0x305c
  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