------------[ cut here ]------------
WARNING: fs/inode.c:474 at inc_nlink+0x122/0x150 fs/inode.c:474, CPU#0: syz.8.324/8128
Modules linked in:
CPU: 0 UID: 0 PID: 8128 Comm: syz.8.324 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:inc_nlink+0x122/0x150 fs/inode.c:474
Code: eb ff e9 3a ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 4c ff ff ff 48 89 df e8 d9 ec eb ff e9 3f ff ff ff e8 4f 86 89 ff 90 <0f> 0b 90 eb 80 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 50 ff ff ff
RSP: 0018:ffffc90003c47c68 EFLAGS: 00010293
RAX: ffffffff8236ec31 RBX: ffff88805fba1cb0 RCX: ffff88802ea51e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1db516f R12: dffffc0000000000
R13: 1ffff1100bf74396 R14: ffff88805fba1c68 R15: ffff88805fba1d78
FS:  00007f18ba6a56c0(0000) GS:ffff888126d12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff97c179e9c CR3: 000000005a4c4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 nilfs_mkdir+0xf6/0x330 fs/nilfs2/namei.c:232
 vfs_mkdir+0x52d/0x5d0 fs/namei.c:5130
 do_mkdirat+0x27a/0x4b0 fs/namei.c:5164
 __do_sys_mkdir fs/namei.c:5191 [inline]
 __se_sys_mkdir fs/namei.c:5189 [inline]
 __x64_sys_mkdir+0x6c/0x80 fs/namei.c:5189
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f18bc45f749
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:00007f18ba6a5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f18bc6b6090 RCX: 00007f18bc45f749
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000200000000880
RBP: 00007f18bc4e3f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f18bc6b6128 R14: 00007f18bc6b6090 R15: 00007ffdad90d748
 </TASK>