REISERFS warning: reiserfs-5090 is_tree_node: node level 0 does not match to the expected one -1
REISERFS error (device loop0): vs-5150 search_by_key: invalid format found in block 0. Fsck?
REISERFS (device loop0): Remounting filesystem read-only
divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5896 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:do_journal_end+0x135f/0x4860 fs/reiserfs/journal.c:4096
Code: 0f b6 04 20 84 c0 0f 85 1f 30 00 00 49 8d 44 1d 01 4c 89 f1 48 c1 e9 03 42 0f b6 0c 21 84 c9 0f 85 26 30 00 00 41 8b 0f 31 d2 <48> f7 f1 49 89 d6 4c 03 74 24 08 48 8b 84 24 d8 00 00 00 42 80 3c
RSP: 0018:ffffc90003367720 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8abcd100 RDI: ffff888075e49ff4
RBP: ffffc90003367990 R08: 424c724573496552 R09: 424c724573496552
R10: dffffc0000000000 R11: ffffed100ebc9400 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88806d929017 R15: ffff88806d929014
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff8bae38d0 CR3: 000000000cb30000 CR4: 00000000003506e0
Call Trace:
<TASK>
do_journal_release+0x4ef/0x550 fs/reiserfs/journal.c:1940
journal_release+0x1f/0x30 fs/reiserfs/journal.c:1971
reiserfs_put_super+0x222/0x480 fs/reiserfs/super.c:616
generic_shutdown_super+0x134/0x2b0 fs/super.c:693
kill_block_super+0x44/0x90 fs/super.c:1660
deactivate_locked_super+0x97/0x100 fs/super.c:481
cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250
task_work_run+0x1ce/0x250 kernel/task_work.c:239
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x90b/0x23c0 kernel/exit.c:883
do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
__do_sys_exit_group kernel/exit.c:1035 [inline]
__se_sys_exit_group kernel/exit.c:1033 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fab3338eba9
Code: Unable to access opcode bytes at 0x7fab3338eb7f.
RSP: 002b:00007fff8bae59c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fab33411c77 RCX: 00007fab3338eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000010 R08: 00007fff8bae3766 R09: 00007fff8bae6c80
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff8bae6c80
R13: 00007fab33411c05 R14: 0000555556d184a8 R15: 00007fff8bae7d50
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:do_journal_end+0x135f/0x4860 fs/reiserfs/journal.c:4096
Code: 0f b6 04 20 84 c0 0f 85 1f 30 00 00 49 8d 44 1d 01 4c 89 f1 48 c1 e9 03 42 0f b6 0c 21 84 c9 0f 85 26 30 00 00 41 8b 0f 31 d2 <48> f7 f1 49 89 d6 4c 03 74 24 08 48 8b 84 24 d8 00 00 00 42 80 3c
RSP: 0018:ffffc90003367720 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8abcd100 RDI: ffff888075e49ff4
RBP: ffffc90003367990 R08: 424c724573496552 R09: 424c724573496552
R10: dffffc0000000000 R11: ffffed100ebc9400 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88806d929017 R15: ffff88806d929014
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff8bae38d0 CR3: 000000000cb30000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
0: 0f b6 04 20 movzbl (%rax,%riz,1),%eax
4: 84 c0 test %al,%al
6: 0f 85 1f 30 00 00 jne 0x302b
c: 49 8d 44 1d 01 lea 0x1(%r13,%rbx,1),%rax
11: 4c 89 f1 mov %r14,%rcx
14: 48 c1 e9 03 shr $0x3,%rcx
18: 42 0f b6 0c 21 movzbl (%rcx,%r12,1),%ecx
1d: 84 c9 test %cl,%cl
1f: 0f 85 26 30 00 00 jne 0x304b
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 08 add 0x8(%rsp),%r14
35: 48 8b 84 24 d8 00 00 mov 0xd8(%rsp),%rax
3c: 00
3d: 42 rex.X
3e: 80 .byte 0x80
3f: 3c .byte 0x3c