------------[ cut here ]------------
WARNING: CPU: 0 PID: 6608 at fs/inode.c:474 inc_nlink+0x122/0x150 fs/inode.c:474
Modules linked in:
CPU: 0 UID: 0 PID: 6608 Comm: syz.4.81 Tainted: G        W           6.16.0-syzkaller-11568-gd632ab86aff2 #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:inc_nlink+0x122/0x150 fs/inode.c:474
Code: ec 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 79 94 ec ff e9 3f ff ff ff e8 ef 68 8d 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:ffffc90003fcf428 EFLAGS: 00010283
RAX: ffffffff8230f0d1 RBX: ffff888068486160 RCX: 0000000000080000
RDX: ffffc90014230000 RSI: 00000000000010f7 RDI: 00000000000010f8
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1e39ee7 R12: dffffc0000000000
R13: 1ffff1100d090c2c R14: ffff888068486118 R15: ffff888068486228
FS:  00007f2e1c8666c0(0000) GS:ffff8881268cd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff48f549000 CR3: 000000003c20e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 nilfs_mkdir+0xf6/0x330 fs/nilfs2/namei.c:232
 vfs_mkdir+0x306/0x510 fs/namei.c:4366
 ovl_do_mkdir fs/overlayfs/overlayfs.h:251 [inline]
 ovl_workdir_create+0x4c3/0x8b0 fs/overlayfs/super.c:330
 ovl_make_workdir fs/overlayfs/super.c:669 [inline]
 ovl_get_workdir+0x32f/0x17c0 fs/overlayfs/super.c:827
 ovl_fill_super+0x1365/0x35b0 fs/overlayfs/super.c:1406
 vfs_get_super fs/super.c:1325 [inline]
 get_tree_nodev+0xbb/0x150 fs/super.c:1344
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805
 do_mount fs/namespace.c:4133 [inline]
 __do_sys_mount fs/namespace.c:4344 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4321
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2e1f28eb69
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:00007f2e1c866038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2e1f4b6320 RCX: 00007f2e1f28eb69
RDX: 0000200000000b80 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 00007f2e1f311df1 R08: 0000200000000200 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f2e1f4b6320 R15: 00007fff10578328
 </TASK>