------------[ cut here ]------------
WARNING: CPU: 1 PID: 6230 at fs/inode.c:364 inc_nlink+0x120/0x130
Modules linked in:

CPU: 1 PID: 6230 Comm: syz.2.608 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:inc_nlink+0x120/0x130 fs/inode.c:364
Code: ed ff e9 37 ff ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 49 ff ff ff 4c 89 ef e8 ca 9e ed ff e9 3c ff ff ff e8 b0 d4 a3 ff <0f> 0b eb 80 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 53 48
RSP: 0018:ffffc90002f27c08 EFLAGS: 00010283

RAX: ffffffff81dc85c0 RBX: 1ffff1100e82f032 RCX: 0000000000040000
RDX: ffffc9000b979000 RSI: 0000000000011c12 RDI: 0000000000011c13
RBP: 0000000000000000 R08: ffffffff81dc853a R09: ffffed100e82f106
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888074178190 R14: ffff888074178148 R15: 0000000000000007
FS:  00007f48448f56c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbb405b5440 CR3: 0000000067191000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 v9fs_vfs_mkdir_dotl+0x6c9/0x870 fs/9p/vfs_inode_dotl.c:458
 vfs_mkdir+0x3b6/0x590 fs/namei.c:4065
 do_mkdirat+0x260/0x520 fs/namei.c:4090
 __do_sys_mkdir fs/namei.c:4110 [inline]
 __se_sys_mkdir fs/namei.c:4108 [inline]
 __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4108
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f484647cef9
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:00007f48448f5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f4846634f80 RCX: 00007f484647cef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007f48464efb76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4846634f80 R15: 00007ffe0af97c78
 </TASK>