================================================================================
UBSAN: array-index-out-of-bounds in kernel/pid.c:244:15
index 1 is out of range for type 'upid [1]'
CPU: 1 PID: 5008 Comm: syz-executor.0 Not tainted 6.4.0-syzkaller-04247-g3a8a670eeeaa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_out_of_bounds+0xd5/0x140 lib/ubsan.c:348
 alloc_pid+0xbe5/0xdd0 kernel/pid.c:244
 copy_process+0x4589/0x7620 kernel/fork.c:2519
 kernel_clone+0xeb/0x890 kernel/fork.c:2911
 __do_compat_sys_ia32_clone+0x9e/0xd0 arch/x86/kernel/sys_ia32.c:254
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 do_int80_syscall_32+0x4a/0x90 arch/x86/entry/common.c:132
 entry_INT80_compat+0x8f/0xa0 arch/x86/entry/entry_64_compat.S:353
RIP: 0023:0xf725c8e4
Code: 8b 44 24 04 89 41 08 c7 41 04 00 00 00 00 53 56 57 8b 74 24 24 8b 54 24 20 8b 5c 24 18 8b 7c 24 28 b8 78 00 00 00 89 19 cd 80 <5f> 5e 5b 85 c0 0f 8c 61 81 00 00 74 01 c3 89 f5 ff d3 e8 00 00 00
RSP: 002b:00000000ffbb1d90 EFLAGS: 00000292 ORIG_RAX: 0000000000000078
RAX: ffffffffffffffda RBX: 0000000030000000 RCX: 00000000f749ffa4
RDX: 00000000f73a0000 RSI: 0000000000001000 RDI: 0000000000000000
RBP: 00000000ffbb2278 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
================================================================================
----------------
Code disassembly (best guess):
   0:	8b 44 24 04          	mov    0x4(%rsp),%eax
   4:	89 41 08             	mov    %eax,0x8(%rcx)
   7:	c7 41 04 00 00 00 00 	movl   $0x0,0x4(%rcx)
   e:	53                   	push   %rbx
   f:	56                   	push   %rsi
  10:	57                   	push   %rdi
  11:	8b 74 24 24          	mov    0x24(%rsp),%esi
  15:	8b 54 24 20          	mov    0x20(%rsp),%edx
  19:	8b 5c 24 18          	mov    0x18(%rsp),%ebx
  1d:	8b 7c 24 28          	mov    0x28(%rsp),%edi
  21:	b8 78 00 00 00       	mov    $0x78,%eax
  26:	89 19                	mov    %ebx,(%rcx)
  28:	cd 80                	int    $0x80
* 2a:	5f                   	pop    %rdi <-- trapping instruction
  2b:	5e                   	pop    %rsi
  2c:	5b                   	pop    %rbx
  2d:	85 c0                	test   %eax,%eax
  2f:	0f 8c 61 81 00 00    	jl     0x8196
  35:	74 01                	je     0x38
  37:	c3                   	retq
  38:	89 f5                	mov    %esi,%ebp
  3a:	ff d3                	callq  *%rbx
  3c:	e8                   	.byte 0xe8
  3d:	00 00                	add    %al,(%rax)