------------[ cut here ]------------
WARNING: CPU: 1 PID: 27382 at fs/inode.c:389 inc_nlink+0x121/0x130 fs/inode.c:389
Modules linked in:
CPU: 1 PID: 27382 Comm: syz.3.7544 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:inc_nlink+0x121/0x130 fs/inode.c:389
Code: 58 ea ff e9 3a ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 4c ff ff ff 48 89 df e8 f9 57 ea ff e9 3f ff ff ff e8 ef 0c 93 ff <0f> 0b eb 82 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 41 57 41
RSP: 0018:ffffc900035d7c28 EFLAGS: 00010283
RAX: ffffffff81f28ab1 RBX: ffff88805ac3c048 RCX: 0000000000080000
RDX: ffffc9000d6c1000 RSI: 000000000000691e RDI: 000000000000691f
RBP: 0000000000000000 R08: ffff88805ac3babb R09: 1ffff1100b587757
R10: dffffc0000000000 R11: ffffed100b587758 R12: dffffc0000000000
R13: 1ffff1100b587809 R14: ffff88805ac3bff0 R15: 0000000000000000
FS:  00007f42dbf4f6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001100 CR3: 0000000066c3c000 CR4: 00000000003526e0
Call Trace:
 <TASK>
 v9fs_vfs_mkdir_dotl+0x624/0x780 fs/9p/vfs_inode_dotl.c:431
 vfs_mkdir+0x296/0x440 fs/namei.c:4113
 do_mkdirat+0x1d4/0x440 fs/namei.c:4136
 __do_sys_mkdirat fs/namei.c:4151 [inline]
 __se_sys_mkdirat fs/namei.c:4149 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f42db18d617
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:00007f42dbf4ee68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f42dbf4eef0 RCX: 00007f42db18d617
RDX: 00000000000001ff RSI: 00002000000002c0 RDI: 00000000ffffff9c
RBP: 00002000000001c0 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 00002000000002c0
R13: 00007f42dbf4eeb0 R14: 0000000000000000 R15: 0000200000000380
 </TASK>