divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 4120 Comm: syz-executor.1 Not tainted 5.15.156-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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:ffffc900046378b0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: ffff88801ddbe014 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801cc09000 RBP: ffff88801ddbe017 R08: dffffc0000000000 R09: ffff88801cc09000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000003 FS: 00007f83b87a16c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd67809db8 CR3: 000000005cf31000 CR4: 00000000003526e0 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 reiserfs_remount+0x1e4/0x18e0 fs/reiserfs/super.c:1447 reconfigure_super+0x43a/0x870 fs/super.c:925 do_remount fs/namespace.c:2661 [inline] path_mount+0xceb/0x10a0 fs/namespace.c:3327 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533 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: 0033:0x7f83ba2515aa Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f83b87a0ef8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f83b87a0f80 RCX: 00007f83ba2515aa RDX: 0000000020000180 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 0000000020000180 R08: 00007f83b87a0f80 R09: 0000000001a42424 R10: 0000000001a42424 R11: 0000000000000206 R12: 0000000020000100 R13: 00007f83b87a0f40 R14: 0000000000000000 R15: 0000000020000140 Modules linked in: ---[ end trace af92e326cb761c82 ]--- 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:ffffc900046378b0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: ffff88801ddbe014 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801cc09000 RBP: ffff88801ddbe017 R08: dffffc0000000000 R09: ffff88801cc09000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000003 FS: 00007f83b87a16c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005cf31000 CR4: 00000000003526e0 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)