divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8601 Comm: syz-executor.3 Not tainted 5.15.156-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:flush_commit_list+0xb4e/0x1ec0 fs/reiserfs/journal.c:1049 Code: c0 4c 8b ac 24 a8 00 00 00 0f 85 d5 01 00 00 4c 89 e0 48 c1 e8 03 0f b6 04 30 84 c0 0f 85 ec 01 00 00 41 8b 0f 48 89 d8 31 d2 <48> f7 f1 49 89 d7 49 83 c6 18 4c 89 f0 48 c1 e8 03 80 3c 30 00 74 RSP: 0018:ffffc900034c7a20 EFLAGS: 00010246 RAX: 00000000000000e7 RBX: 00000000000000e7 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000040000 RBP: ffffc900034c7ba0 R08: dffffc0000000000 R09: ffffed100971df4c R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888054e20017 R13: ffff88807c19a018 R14: ffff888056c5a000 R15: ffff888054e20014 FS: 00007f4d36f506c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002005a000 CR3: 000000004b0ec000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_journal_end+0x3bb3/0x4650 fs/reiserfs/journal.c:4372 reiserfs_sync_fs+0xca/0x140 fs/reiserfs/super.c:78 iterate_supers+0x127/0x1e0 fs/super.c:705 ksys_sync+0xd7/0x1c0 fs/sync.c:104 __do_sys_sync+0xa/0x10 fs/sync.c:113 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f4d38a61ea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4d36f500c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f4d38b902c0 RCX: 00007f4d38a61ea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f4d38aae4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f4d38b902c0 R15: 00007ffe6ee2b4d8 Modules linked in: ---[ end trace 4faff2effb8036f2 ]--- RIP: 0010:flush_commit_list+0xb4e/0x1ec0 fs/reiserfs/journal.c:1049 Code: c0 4c 8b ac 24 a8 00 00 00 0f 85 d5 01 00 00 4c 89 e0 48 c1 e8 03 0f b6 04 30 84 c0 0f 85 ec 01 00 00 41 8b 0f 48 89 d8 31 d2 <48> f7 f1 49 89 d7 49 83 c6 18 4c 89 f0 48 c1 e8 03 80 3c 30 00 74 RSP: 0018:ffffc900034c7a20 EFLAGS: 00010246 RAX: 00000000000000e7 RBX: 00000000000000e7 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000040000 RBP: ffffc900034c7ba0 R08: dffffc0000000000 R09: ffffed100971df4c R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888054e20017 R13: ffff88807c19a018 R14: ffff888056c5a000 R15: ffff888054e20014 FS: 00007f4d36f506c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2bf25000 CR3: 000000004b0ec000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c0 4c 8b ac 24 rorb $0x24,-0x54(%rbx,%rcx,4) 5: a8 00 test $0x0,%al 7: 00 00 add %al,(%rax) 9: 0f 85 d5 01 00 00 jne 0x1e4 f: 4c 89 e0 mov %r12,%rax 12: 48 c1 e8 03 shr $0x3,%rax 16: 0f b6 04 30 movzbl (%rax,%rsi,1),%eax 1a: 84 c0 test %al,%al 1c: 0f 85 ec 01 00 00 jne 0x20e 22: 41 8b 0f mov (%r15),%ecx 25: 48 89 d8 mov %rbx,%rax 28: 31 d2 xor %edx,%edx * 2a: 48 f7 f1 div %rcx <-- trapping instruction 2d: 49 89 d7 mov %rdx,%r15 30: 49 83 c6 18 add $0x18,%r14 34: 4c 89 f0 mov %r14,%rax 37: 48 c1 e8 03 shr $0x3,%rax 3b: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) 3f: 74 .byte 0x74