divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 4748 Comm: syz.1.110 Not tainted 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:do_journal_end+0x11eb/0x42d0 fs/reiserfs/journal.c:4089 Code: df 0f b6 04 28 84 c0 0f 85 44 2c 00 00 49 8d 44 1d 01 4c 89 f1 48 c1 e9 03 0f b6 0c 29 84 c9 0f 85 4c 2c 00 00 41 8b 0f 31 d2 <48> f7 f1 49 89 d6 4d 01 e6 48 8b 84 24 b8 00 00 00 80 3c 28 00 4c RSP: 0018:ffffc900032cf8f0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807be8c000 RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffff88807be8b000 R10: 0000000000000000 R11: 0000000000000200 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88805f9bc017 R15: ffff88805f9bc014 FS: 00007fd19875a6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffd741be20 CR3: 00000000235ee000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: reiserfs_sync_fs+0xcc/0x150 fs/reiserfs/super.c:78 sync_filesystem+0xe6/0x220 fs/sync.c:56 reiserfs_remount+0x122/0x1480 fs/reiserfs/super.c:1447 reconfigure_super+0x219/0x880 fs/super.c:938 do_remount fs/namespace.c:2670 [inline] path_mount+0xd3e/0x1020 fs/namespace.c:3336 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fd19a913969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd19875a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fd19ab3b080 RCX: 00007fd19a913969 RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000 RBP: 00007fd19a995ab1 R08: 0000200000000000 R09: 0000000000000000 R10: 0000000002200020 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd19ab3b080 R15: 00007ffc27fdf438 Modules linked in: ---[ end trace e6df2ba58255a8a3 ]--- RIP: 0010:do_journal_end+0x11eb/0x42d0 fs/reiserfs/journal.c:4089 Code: df 0f b6 04 28 84 c0 0f 85 44 2c 00 00 49 8d 44 1d 01 4c 89 f1 48 c1 e9 03 0f b6 0c 29 84 c9 0f 85 4c 2c 00 00 41 8b 0f 31 d2 <48> f7 f1 49 89 d6 4d 01 e6 48 8b 84 24 b8 00 00 00 80 3c 28 00 4c RSP: 0018:ffffc900032cf8f0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807be8c000 RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffff88807be8b000 R10: 0000000000000000 R11: 0000000000000200 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88805f9bc017 R15: ffff88805f9bc014 FS: 00007fd19875a6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1ac2b69000 CR3: 00000000235ee000 CR4: 00000000003526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: df 0f fisttps (%rdi) 2: b6 04 mov $0x4,%dh 4: 28 84 c0 0f 85 44 2c sub %al,0x2c44850f(%rax,%rax,8) b: 00 00 add %al,(%rax) d: 49 8d 44 1d 01 lea 0x1(%r13,%rbx,1),%rax 12: 4c 89 f1 mov %r14,%rcx 15: 48 c1 e9 03 shr $0x3,%rcx 19: 0f b6 0c 29 movzbl (%rcx,%rbp,1),%ecx 1d: 84 c9 test %cl,%cl 1f: 0f 85 4c 2c 00 00 jne 0x2c71 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: 4d 01 e6 add %r12,%r14 33: 48 8b 84 24 b8 00 00 mov 0xb8(%rsp),%rax 3a: 00 3b: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 3f: 4c rex.WR