WARNING: CPU: 3 PID: 13415 at fs/inode.c:388 inc_nlink+0x144/0x160 fs/inode.c:388
Modules linked in:
CPU: 2 PID: 13415 Comm: syz-executor.3 Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:inc_nlink+0x144/0x160 fs/inode.c:388
Code: ff 4c 89 e7 e8 fd 95 ec ff e9 42 ff ff ff 4c 89 e7 e8 80 95 ec ff e9 fc fe ff ff 4c 89 e7 e8 73 95 ec ff eb d4 e8 9c 14 a5 ff <0f> 0b e9 6e ff ff ff e8 70 95 ec ff e9 44 ff ff ff e8 66 95 ec ff
RSP: 0018:ffffc90023a0fca0 EFLAGS: 00010216
RAX: 000000000001ecd9 RBX: ffff888046318680 RCX: ffffc900034b6000
RDX: 0000000000040000 RSI: ffffffff81d39b74 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880463b8143
R10: ffffffff81d39ae0 R11: 0000000000000002 R12: ffff8880463186c8
R13: ffff888046333490 R14: ffff8880463b80b8 R15: ffff88804a6a1800
FS:  0000000000000000(0000) GS:ffff88802cc00000(0063) knlGS:00000000f5865b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007f25a9b33500 CR3: 000000006d0b2000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 v9fs_vfs_mkdir_dotl+0x478/0x770 fs/9p/vfs_inode_dotl.c:454
 vfs_mkdir+0x1c3/0x3b0 fs/namei.c:3933
 do_mkdirat+0x285/0x300 fs/namei.c:3959
 __do_sys_mkdir fs/namei.c:3979 [inline]
 __se_sys_mkdir fs/namei.c:3977 [inline]
 __ia32_sys_mkdir+0xf2/0x140 fs/namei.c:3977
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6e6b549
Code: 03 74 c0 01 10 05 03 74 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 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:00000000f58655cc EFLAGS: 00000296 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00000000200002c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	03 74 c0 01          	add    0x1(%rax,%rax,8),%esi
   4:	10 05 03 74 b8 01    	adc    %al,0x1b87403(%rip)        # 0x1b8740d
   a:	10 06                	adc    %al,(%rsi)
   c:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
  10:	10 07                	adc    %al,(%rdi)
  12:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
  16:	10 08                	adc    %cl,(%rax)
  18:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1c:	00 00                	add    %al,(%rax)
  1e:	00 00                	add    %al,(%rax)
  20:	00 51 52             	add    %dl,0x52(%rcx)
  23:	55                   	push   %rbp
  24:	89 e5                	mov    %esp,%ebp
  26:	0f 34                	sysenter
  28:	cd 80                	int    $0x80
* 2a:	5d                   	pop    %rbp <-- trapping instruction
  2b:	5a                   	pop    %rdx
  2c:	59                   	pop    %rcx
  2d:	c3                   	retq
  2e:	90                   	nop
  2f:	90                   	nop
  30:	90                   	nop
  31:	90                   	nop
  32:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  39:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi