------------[ cut here ]------------
WARNING: CPU: 0 PID: 3608 at fs/inode.c:388 inc_nlink+0x144/0x160 fs/inode.c:388
Modules linked in:

CPU: 1 PID: 3608 Comm: syz-executor409 Not tainted 5.19.0-syzkaller-13930-g7ebfc85e2cd7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:inc_nlink+0x144/0x160 fs/inode.c:388
Code: ff 4c 89 e7 e8 9d f1 ea ff e9 42 ff ff ff 4c 89 e7 e8 20 f1 ea ff e9 fc fe ff ff 4c 89 e7 e8 13 f1 ea ff eb d4 e8 2c 5b 9f ff <0f> 0b e9 6e ff ff ff e8 10 f1 ea ff e9 44 ff ff ff e8 06 f1 ea ff
RSP: 0018:ffffc90002f47ca0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88806b882618 RCX: 0000000000000000
RDX: ffff8880758641c0 RSI: ffffffff81dbda94 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000001d R12: ffff88806b882660
R13: ffff88806fc70df8 R14: 1ffff920005e8f9c R15: ffff88807b2a9c00
FS:  000055555561d3c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055995000fbf0 CR3: 0000000020966000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 v9fs_vfs_mkdir_dotl+0x5c5/0x900 fs/9p/vfs_inode_dotl.c:444
 vfs_mkdir+0x489/0x740 fs/namei.c:4013
 do_mkdirat+0x28c/0x310 fs/namei.c:4038
 __do_sys_mkdir fs/namei.c:4058 [inline]
 __se_sys_mkdir fs/namei.c:4056 [inline]
 __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4056
 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: 0033:0x7f4fbda07819
Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd3a7725e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffd3a7725f8 RCX: 00007f4fbda07819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007ffd3a7725f0 R08: 00007f4fbd9c5ae0 R09: 00007f4fbd9c5ae0
R10: 0000000020000340 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>