------------[ cut here ]------------
WARNING: CPU: 0 PID: 20848 at fs/inode.c:388 inc_nlink+0x144/0x160 fs/inode.c:388
Modules linked in:

CPU: 0 PID: 20848 Comm: syz-executor.1 Not tainted 5.19.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:inc_nlink+0x144/0x160 fs/inode.c:388
Code: ff 4c 89 e7 e8 8d c1 ea ff e9 42 ff ff ff 4c 89 e7 e8 10 c1 ea ff e9 fc fe ff ff 4c 89 e7 e8 03 c1 ea ff eb d4 e8 dc 83 9e ff <0f> 0b e9 6e ff ff ff e8 00 c1 ea ff e9 44 ff ff ff e8 f6 c0 ea ff
RSP: 0018:ffffc90003b77cc0 EFLAGS: 00010216
RAX: 00000000000348b5 RBX: ffff888058d3c698 RCX: ffffc90003351000
RDX: 0000000000040000 RSI: ffffffff81db1844 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000024 R12: ffff888058d3c6e0
R13: ffff8880270f5a48 R14: ffff888058f6f100 R15: ffff88801ba91400
FS:  00007ff6dfabd700(0000) GS:ffff88802c900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f77c04a8ff8 CR3: 0000000075950000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 v9fs_vfs_mkdir_dotl+0x478/0x770 fs/9p/vfs_inode_dotl.c:457
 vfs_mkdir+0x1c3/0x3b0 fs/namei.c:3975
 do_mkdirat+0x285/0x300 fs/namei.c:4001
 __do_sys_mkdir fs/namei.c:4021 [inline]
 __se_sys_mkdir fs/namei.c:4019 [inline]
 __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4019
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff6de889209
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff6dfabd168 EFLAGS: 00000246
 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ff6de99bf60 RCX: 00007ff6de889209
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007ff6de8e3161 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea384680f R14: 00007ff6dfabd300 R15: 0000000000022000
 </TASK>