------------[ cut here ]------------
WARNING: CPU: 1 PID: 5438 at fs/inode.c:389 inc_nlink+0x14d/0x170 fs/inode.c:389
Modules linked in:
CPU: 1 PID: 5438 Comm: syz-executor.1 Not tainted 6.9.0-rc5-syzkaller-00025-ga2c63a3f3d68 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:inc_nlink+0x14d/0x170 fs/inode.c:389
Code: 4c 89 e7 e8 f5 65 e8 ff e9 3e ff ff ff 4c 89 e7 e8 f8 64 e8 ff e9 f8 fe ff ff 4c 89 e7 e8 eb 64 e8 ff eb d4 e8 64 e1 8b ff 90 <0f> 0b 90 e9 6c ff ff ff e8 06 65 e8 ff e9 42 ff ff ff e8 fc 64 e8
RSP: 0018:ffffc90006c67db8 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88804b170038 RCX: ffffc900063ea000
RDX: 0000000000040000 RSI: ffffffff8202836c RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: ffff88804b170080
R13: ffffffff8b3ba600 R14: ffff88804b170060 R15: ffff88804b170058
FS:  0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5ec6b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007ffefcbc1f88 CR3: 000000005dc10000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_inc_link_count include/linux/fs.h:2435 [inline]
 sysv_mkdir+0x22/0x150 fs/sysv/namei.c:119
 vfs_mkdir+0x57d/0x820 fs/namei.c:4123
 do_mkdirat+0x301/0x3a0 fs/namei.c:4146
 __do_sys_mkdir fs/namei.c:4166 [inline]
 __se_sys_mkdir fs/namei.c:4164 [inline]
 __ia32_sys_mkdir+0xf0/0x140 fs/namei.c:4164
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf72d4579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5ec65ac EFLAGS: 00000292 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 0000000020000400 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi