------------[ cut here ]------------
!(inode_state_read_once(inode) & I_LINKABLE)
WARNING: fs/inode.c:465 at inc_nlink+0x122/0x150 fs/inode.c:465, CPU#1: syz.2.854/12278
Modules linked in:
CPU: 1 UID: 0 PID: 12278 Comm: syz.2.854 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:inc_nlink+0x122/0x150 fs/inode.c:465
Code: ea 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 39 2f ea ff e9 3f ff ff ff e8 ff ca 80 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:ffffc9000dbb7448 EFLAGS: 00010283
RAX: ffffffff82445d51 RBX: ffff88806161b710 RCX: 0000000000080000
RDX: ffffc90012941000 RSI: 0000000000001049 RDI: 000000000000104a
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f15fdf R12: dffffc0000000000
R13: 1ffff1100c2c36e2 R14: ffff88806161b6c8 R15: ffff88806161b7d8
FS:  00007f89e13086c0(0000) GS:ffff888126211000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f555603f7f4 CR3: 000000005f6de000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 nilfs_mkdir+0x10d/0x390 fs/nilfs2/namei.c:232
 vfs_mkdir+0x402/0x620 fs/namei.c:5272
 ovl_do_mkdir fs/overlayfs/overlayfs.h:257 [inline]
 ovl_workdir_create+0x45f/0x8b0 fs/overlayfs/super.c:345
 ovl_make_workdir fs/overlayfs/super.c:678 [inline]
 ovl_get_workdir fs/overlayfs/super.c:836 [inline]
 ovl_fill_super_creds fs/overlayfs/super.c:1449 [inline]
 ovl_fill_super+0x19ad/0x5d40 fs/overlayfs/super.c:1560
 vfs_get_super fs/super.c:1267 [inline]
 get_tree_nodev+0xbb/0x150 fs/super.c:1286
 vfs_get_tree+0x92/0x2a0 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3841
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4367
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89e417ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f89e1308028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f89e43f6540 RCX: 00007f89e417ce59
RDX: 0000200000000440 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 00007f89e4212e6f R08: 00002000000004c0 R09: 0000000000000000
R10: 0000000000000048 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f89e43f65d8 R14: 00007f89e43f6540 R15: 00007ffe884c3de8
 </TASK>