loop0: detected capacity change from 0 to 131072
F2FS-fs (loop0): invalid crc value
F2FS-fs (loop0): Found nat_bits in checkpoint
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4
overlay: ./file2 is not a directory
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5320 at fs/inode.c:474 inc_nlink+0x127/0x150 fs/inode.c:474
Modules linked in:
CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #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+0x127/0x150 fs/inode.c:474
Code: ff e9 35 ff ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 47 ff ff ff 4c 89 ef e8 f4 72 e6 ff e9 3a ff ff ff e8 1a 54 7e ff 90 <0f> 0b 90 e9 7b ff ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 49
RSP: 0018:ffffc9000d4af990 EFLAGS: 00010283
RAX: ffffffff82450eb6 RBX: 1ffff11008b27586 RCX: 0000000000100000
RDX: ffffc9000e502000 RSI: 0000000000003300 RDI: 0000000000003301
RBP: 0000000000000000 R08: ffffffff82450e30 R09: 1ffff11008b27843
R10: dffffc0000000000 R11: ffffed1008b27844 R12: dffffc0000000000
R13: ffff88804593ac30 R14: ffff88804593abe8 R15: 0000000000000008
FS:  00007f633adf56c0(0000) GS:ffff88808c824000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63337ff000 CR3: 0000000037a9c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 f2fs_i_links_write fs/f2fs/f2fs.h:3120 [inline]
 f2fs_update_parent_metadata+0xcc/0x2b0 fs/f2fs/dir.c:590
 f2fs_add_inline_entry+0x67b/0x8b0 fs/f2fs/inline.c:691
 f2fs_add_dentry+0xba/0x1e0 fs/f2fs/dir.c:765
 f2fs_do_add_link+0x28e/0x3a0 fs/f2fs/dir.c:808
 f2fs_add_link fs/f2fs/f2fs.h:3616 [inline]
 f2fs_mkdir+0x307/0x540 fs/f2fs/namei.c:712
 vfs_mkdir+0x2f9/0x500 fs/namei.c:4324
 do_mkdirat+0x273/0x3f0 fs/namei.c:4357
 __do_sys_mkdirat fs/namei.c:4374 [inline]
 __se_sys_mkdirat fs/namei.c:4372 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4372
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f633e98b9d7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f633adf4e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f633adf4ef0 RCX: 00007f633e98b9d7
RDX: 00000000000001ff RSI: 0000200000000680 RDI: 00000000ffffff9c
RBP: 0000200000000080 R08: 0000200000000d40 R09: 0000000000000000
R10: 0000200000000080 R11: 0000000000000246 R12: 0000200000000680
R13: 00007f633adf4eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>