VFS: Found a V7 FS (block size = 512) on device loop1
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WARNING: CPU: 0 PID: 10163 at fs/inode.c:361 inc_nlink+0x126/0x150 fs/inode.c:365
Modules linked in:
CPU: 0 PID: 10163 Comm: syz-executor.1 Not tainted 5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inc_nlink+0x126/0x150 fs/inode.c:361
Code: ef 89 44 24 04 e8 ca 8a f0 ff 8b 44 24 04 e9 4d ff ff ff 48 89 ef e8 49 8a f0 ff e9 14 ff ff ff 48 89 ef e8 3c 8a f0 ff eb cc <0f> 0b e9 6a ff ff ff e8 3e 8a f0 ff e9 53 ff ff ff e8 34 8a f0 ff
RSP: 0018:ffffc9000b557df0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88804a6899d8 RCX: 00000000000000a8
RDX: 1ffff110094d1356 RSI: ffff88804a6899d8 RDI: ffff88804a689ab0
RBP: ffff88804a689a20 R08: ffff88804a6899f8 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88804a6899d8
R13: ffff88803ba37040 R14: 0000000000000000 R15: ffff88804a6899d8
FS:  00007fdd7eed2700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeffeb5960 CR3: 0000000013fc2000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 inode_inc_link_count include/linux/fs.h:2433 [inline]
 sysv_mkdir+0x17/0xf0 fs/sysv/namei.c:119
 vfs_mkdir+0x43d/0x6a0 fs/namei.c:3823
 do_mkdirat+0x20c/0x280 fs/namei.c:3848
 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: 0033:0x4665f9
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:00007fdd7eed2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9
RDX: 00000000000000b8 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffc45ecd3cf R14: 00007fdd7eed2300 R15: 0000000000022000