divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 4471 Comm: syz-executor.0 Not tainted 5.15.170-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:do_journal_end+0x12f1/0x4650 fs/reiserfs/journal.c:4089 Code: 04 30 84 c0 0f 85 74 2d 00 00 4f 8d 7c 2f 01 48 89 e8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 7a 2d 00 00 8b 0b 4c 89 f8 31 d2 <48> f7 f1 48 89 d3 4c 01 e3 48 8b 84 24 c8 00 00 00 42 80 3c 30 00 RSP: 0018:ffffc90003177ad0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: ffff88806ec2d014 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888022fac000 RBP: ffff88806ec2d017 R08: dffffc0000000000 R09: ffff888022fac000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000003 FS: 0000555578e69480(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9988b69000 CR3: 0000000076e6e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: reiserfs_sync_fs+0xca/0x140 fs/reiserfs/super.c:78 sync_filesystem+0xe8/0x220 fs/sync.c:56 generic_shutdown_super+0x6b/0x310 fs/super.c:448 kill_block_super+0x7a/0xe0 fs/super.c:1427 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f67c96c0017 Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffcc73e7788 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f67c96c0017 RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffcc73e7840 RBP: 00007ffcc73e7840 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcc73e8900 R13: 00007f67c970a3b9 R14: 0000000000014d4b R15: 0000000000000005 Modules linked in: ---[ end trace 34ff46313622eb51 ]--- RIP: 0010:do_journal_end+0x12f1/0x4650 fs/reiserfs/journal.c:4089 Code: 04 30 84 c0 0f 85 74 2d 00 00 4f 8d 7c 2f 01 48 89 e8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 7a 2d 00 00 8b 0b 4c 89 f8 31 d2 <48> f7 f1 48 89 d3 4c 01 e3 48 8b 84 24 c8 00 00 00 42 80 3c 30 00 RSP: 0018:ffffc90003177ad0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: ffff88806ec2d014 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888022fac000 RBP: ffff88806ec2d017 R08: dffffc0000000000 R09: ffff888022fac000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000003 FS: 0000555578e69480(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9988b69000 CR3: 0000000076e6e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 04 30 add $0x30,%al 2: 84 c0 test %al,%al 4: 0f 85 74 2d 00 00 jne 0x2d7e a: 4f 8d 7c 2f 01 lea 0x1(%r15,%r13,1),%r15 f: 48 89 e8 mov %rbp,%rax 12: 48 c1 e8 03 shr $0x3,%rax 16: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax 1b: 84 c0 test %al,%al 1d: 0f 85 7a 2d 00 00 jne 0x2d9d 23: 8b 0b mov (%rbx),%ecx 25: 4c 89 f8 mov %r15,%rax 28: 31 d2 xor %edx,%edx * 2a: 48 f7 f1 div %rcx <-- trapping instruction 2d: 48 89 d3 mov %rdx,%rbx 30: 4c 01 e3 add %r12,%rbx 33: 48 8b 84 24 c8 00 00 mov 0xc8(%rsp),%rax 3a: 00 3b: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)