------------[ cut here ]------------
WARNING: CPU: 0 PID: 6751 at include/linux/cpumask.h:135 cpu_max_bits_warn include/linux/cpumask.h:135 [inline]
WARNING: CPU: 0 PID: 6751 at include/linux/cpumask.h:135 cpumask_check include/linux/cpumask.h:142 [inline]
WARNING: CPU: 0 PID: 6751 at include/linux/cpumask.h:135 cpumask_test_cpu include/linux/cpumask.h:562 [inline]
WARNING: CPU: 0 PID: 6751 at include/linux/cpumask.h:135 io_sq_offload_create+0xe3d/0x1090 io_uring/sqpoll.c:469
Modules linked in:
CPU: 0 UID: 0 PID: 6751 Comm: syz.3.340 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:135 [inline]
RIP: 0010:cpumask_check include/linux/cpumask.h:142 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:562 [inline]
RIP: 0010:io_sq_offload_create+0xe3d/0x1090 io_uring/sqpoll.c:469
Code: 44 24 08 e9 2f f7 ff ff e8 90 47 0e fd 44 89 e3 e9 06 ff ff ff e8 83 47 0e fd 4c 89 ff e8 8b 19 7e fd eb ad e8 74 47 0e fd 90 <0f> 0b 90 e9 f3 fd ff ff e8 66 47 0e fd 31 ff 89 de e8 9d 49 0e fd
RSP: 0018:ffffc9000783fcc8 EFLAGS: 00010283
RAX: 00000000000064b6 RBX: ffff888064e0f400 RCX: ffffc900039d9000
RDX: 0000000000040000 RSI: ffffffff847cdd4c RDI: 0000000000000005
RBP: ffff888065420000 R08: 0000000000000005 R09: 0000000000000007
R10: 0000000002000000 R11: 0000000000000000 R12: 0000000002000000
R13: 1ffff92000f07f9e R14: ffffc9000783fd10 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802b600000(0063) knlGS:00000000f5756b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7495008 CR3: 000000004a6e0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 io_uring_create io_uring/io_uring.c:3617 [inline]
 io_uring_setup+0x180f/0x3730 io_uring/io_uring.c:3726
 __do_sys_io_uring_setup io_uring/io_uring.c:3753 [inline]
 __se_sys_io_uring_setup io_uring/io_uring.c:3747 [inline]
 __ia32_sys_io_uring_setup+0x97/0x140 io_uring/io_uring.c:3747
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 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: 0023:0xf7fd1579
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:00000000f575651c EFLAGS: 00000202 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000000006ae5 RCX: 0000000020000440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000020004000 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