------------[ cut here ]------------
WARNING: CPU: 0 PID: 20548 at fs/inode.c:388 inc_nlink+0x144/0x160 fs/inode.c:388
Modules linked in:
CPU: 0 PID: 20548 Comm: syz-executor.4 Not tainted 5.17.0-rc7-syzkaller-00235-gaad611a868d1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inc_nlink+0x144/0x160 fs/inode.c:388
Code: ff 4c 89 e7 e8 bd 98 ec ff e9 42 ff ff ff 4c 89 e7 e8 40 98 ec ff e9 fc fe ff ff 4c 89 e7 e8 33 98 ec ff eb d4 e8 9c 1e a5 ff <0f> 0b e9 6e ff ff ff e8 30 98 ec ff e9 44 ff ff ff e8 26 98 ec ff
RSP: 0018:ffffc90002d5fcc0 EFLAGS: 00010206
RAX: 000000000002e2d0 RBX: ffff888043c717d8 RCX: ffffc9000be0b000
RDX: 0000000000040000 RSI: ffffffff81d3a194 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888043c723f3
R10: ffffffff81d3a100 R11: 0000000000000002 R12: ffff888043c71820
R13: ffff8880110dba70 R14: ffff888043c72368 R15: ffff888048676400
FS:  00007f82777d6700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000300 CR3: 000000004a6af000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 v9fs_vfs_mkdir_dotl+0x478/0x770 fs/9p/vfs_inode_dotl.c:454
 vfs_mkdir+0x1c3/0x3b0 fs/namei.c:3933
 do_mkdirat+0x285/0x300 fs/namei.c:3959
 __do_sys_mkdir fs/namei.c:3979 [inline]
 __se_sys_mkdir fs/namei.c:3977 [inline]
 __x64_sys_mkdir+0xf2/0x140 fs/namei.c:3977
 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+0x44/0xae
RIP: 0033:0x7f8278e61049
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:00007f82777d6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f8278f73f60 RCX: 00007f8278e61049
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007f8278ebb08d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff3cb97af R14: 00007f82777d6300 R15: 0000000000022000
 </TASK>