------------[ cut here ]------------
WARNING: CPU: 1 PID: 15178 at fs/inode.c:365 inc_nlink+0x144/0x160 fs/inode.c:365
Modules linked in:
CPU: 1 PID: 15178 Comm: syz-executor.2 Not tainted 5.15.0-rc5-next-20211015-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inc_nlink+0x144/0x160 fs/inode.c:365
Code: ff 4c 89 e7 e8 3d 05 ee ff e9 42 ff ff ff 4c 89 e7 e8 c0 04 ee ff e9 fc fe ff ff 4c 89 e7 e8 b3 04 ee ff eb d4 e8 0c 72 a7 ff <0f> 0b e9 6e ff ff ff e8 b0 04 ee ff e9 44 ff ff ff e8 a6 04 ee ff
RSP: 0018:ffffc9000583fdd0 EFLAGS: 00010216
RAX: 0000000000014b01 RBX: ffff88808f3c8038 RCX: ffffc9000de18000
RDX: 0000000000040000 RSI: ffffffff81cff284 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81cff1f0 R11: 0000000000000000 R12: ffff88808f3c8080
R13: ffff88806cdcba70 R14: 0000000000000000 R15: 000000000000007e
FS:  00007fb95f4fb700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc39732998 CR3: 000000001c958000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 inode_inc_link_count include/linux/fs.h:2478 [inline]
 sysv_mkdir+0x21/0x150 fs/sysv/namei.c:119
 vfs_mkdir+0x1ce/0x3f0 fs/namei.c:3885
 do_mkdirat+0x285/0x300 fs/namei.c:3911
 __do_sys_mkdir fs/namei.c:3931 [inline]
 __se_sys_mkdir fs/namei.c:3929 [inline]
 __x64_sys_mkdir+0xf2/0x140 fs/namei.c:3929
 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: 0033:0x7fb961f85a39
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb95f4fb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fb962088f60 RCX: 00007fb961f85a39
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0
RBP: 00007fb961fdfc5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff22b9f1cf R14: 00007fb95f4fb300 R15: 0000000000022000
 </TASK>