loop0: detected capacity change from 0 to 4096
------------[ cut here ]------------
WARNING: fs/inode.c:474 at inc_nlink+0x122/0x150 fs/inode.c:474, CPU#0: syz.0.0/5338
Modules linked in:
CPU: 0 UID: 0 PID: 5338 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:inc_nlink+0x122/0x150 fs/inode.c:474
Code: e6 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 09 fe e6 ff e9 3f ff ff ff e8 af 21 7f 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:ffffc9000bedfc48 EFLAGS: 00010283
RAX: ffffffff82429ea1 RBX: ffff88801ed1b420 RCX: 0000000000100000
RDX: ffffc90020a22000 RSI: 0000000000000c5c RDI: 0000000000000c5d
RBP: 0000000000000000 R08: ffffffff8fa21877 R09: 1ffffffff1f4430e
R10: dffffc0000000000 R11: fffffbfff1f4430f R12: dffffc0000000000
R13: 1ffff11003da3684 R14: ffff88801ed1b3d8 R15: ffff88801ed1b4a8
FS:  00007f01d075f6c0(0000) GS:ffff88808d22f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f01d0717470 CR3: 000000000ddb4000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 nilfs_mkdir+0xf6/0x330 fs/nilfs2/namei.c:232
 vfs_mkdir+0x512/0x5b0 fs/namei.c:5130
 do_mkdirat+0x276/0x4b0 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: 0033:0x7f01cf98f7c9
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:00007f01d075f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f01cfbe5fa0 RCX: 00007f01cf98f7c9
RDX: 0000000000000000 RSI: 000000000000000c RDI: 00002000000002c0
RBP: 00007f01cfa13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f01cfbe6038 R14: 00007f01cfbe5fa0 R15: 00007ffc69a06ee8
 </TASK>