divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 22096 Comm: syz-executor.4 Not tainted 6.4.0-rc7-syzkaller-00194-g8a28a0b6f1a1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:do_journal_end+0x129e/0x4770 fs/reiserfs/journal.c:4089 Code: 28 84 c0 0f 85 00 2f 00 00 4d 8d 64 1c 01 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 07 2f 00 00 41 8b 0f 4c 89 e0 31 d2 <48> f7 f1 48 89 d3 48 03 5c 24 20 48 8b 84 24 d8 00 00 00 42 80 3c RSP: 0018:ffffc9000a94fac0 EFLAGS: 00010246 RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880284c2000 RBP: ffffc9000a94fd30 R08: dffffc0000000000 R09: 0000000000000000 R10: ffff8880284c2000 R11: dffffc0000000001 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff88807fd27017 R15: ffff88807fd27014 FS: 00007fc46924e700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa599f9f000 CR3: 000000002b971000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: journal_end_sync fs/reiserfs/journal.c:3535 [inline] __commit_trans_jl fs/reiserfs/journal.c:3877 [inline] reiserfs_commit_for_inode+0xa6d/0xbe0 fs/reiserfs/journal.c:3920 reiserfs_dir_fsync+0xcb/0x100 fs/reiserfs/dir.c:43 vfs_fsync_range fs/sync.c:188 [inline] vfs_fsync fs/sync.c:202 [inline] do_fsync fs/sync.c:212 [inline] __do_sys_fdatasync fs/sync.c:225 [inline] __se_sys_fdatasync fs/sync.c:223 [inline] __x64_sys_fdatasync+0xb5/0x110 fs/sync.c:223 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc46848c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc46924e168 EFLAGS: 00000246 ORIG_RAX: 000000000000004b RAX: ffffffffffffffda RBX: 00007fc4685abf80 RCX: 00007fc46848c389 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fc4684d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf1b8410f R14: 00007fc46924e300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_journal_end+0x129e/0x4770 fs/reiserfs/journal.c:4089 Code: 28 84 c0 0f 85 00 2f 00 00 4d 8d 64 1c 01 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 07 2f 00 00 41 8b 0f 4c 89 e0 31 d2 <48> f7 f1 48 89 d3 48 03 5c 24 20 48 8b 84 24 d8 00 00 00 42 80 3c RSP: 0018:ffffc9000a94fac0 EFLAGS: 00010246 RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880284c2000 RBP: ffffc9000a94fd30 R08: dffffc0000000000 R09: 0000000000000000 R10: ffff8880284c2000 R11: dffffc0000000001 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff88807fd27017 R15: ffff88807fd27014 FS: 00007fc46924e700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb1449a80c0 CR3: 000000002b971000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 28 84 c0 0f 85 00 2f sub %al,0x2f00850f(%rax,%rax,8) 7: 00 00 add %al,(%rax) 9: 4d 8d 64 1c 01 lea 0x1(%r12,%rbx,1),%r12 e: 4c 89 f0 mov %r14,%rax 11: 48 c1 e8 03 shr $0x3,%rax 15: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax 1a: 84 c0 test %al,%al 1c: 0f 85 07 2f 00 00 jne 0x2f29 22: 41 8b 0f mov (%r15),%ecx 25: 4c 89 e0 mov %r12,%rax 28: 31 d2 xor %edx,%edx * 2a: 48 f7 f1 div %rcx <-- trapping instruction 2d: 48 89 d3 mov %rdx,%rbx 30: 48 03 5c 24 20 add 0x20(%rsp),%rbx 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