------------[ cut here ]------------
WARNING: CPU: 0 PID: 7506 at include/linux/cpumask.h:144 cpu_max_bits_warn include/linux/cpumask.h:144 [inline]
WARNING: CPU: 0 PID: 7506 at include/linux/cpumask.h:144 cpumask_check include/linux/cpumask.h:151 [inline]
WARNING: CPU: 0 PID: 7506 at include/linux/cpumask.h:144 cpumask_clear_cpu include/linux/cpumask.h:538 [inline]
WARNING: CPU: 0 PID: 7506 at include/linux/cpumask.h:144 __mm_cid_put kernel/sched/sched.h:3256 [inline]
WARNING: CPU: 0 PID: 7506 at include/linux/cpumask.h:144 sched_mm_cid_remote_clear+0x374/0x4f0 kernel/sched/core.c:11874
Modules linked in:
CPU: 0 PID: 7506 Comm: syz-executor.1 Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:144 [inline]
RIP: 0010:cpumask_check include/linux/cpumask.h:151 [inline]
RIP: 0010:cpumask_clear_cpu include/linux/cpumask.h:538 [inline]
RIP: 0010:__mm_cid_put kernel/sched/sched.h:3256 [inline]
RIP: 0010:sched_mm_cid_remote_clear+0x374/0x4f0 kernel/sched/core.c:11874
Code: 00 e9 48 fe ff ff 4d 85 ed 89 44 24 48 0f 84 52 ff ff ff e8 6e d6 36 00 9c 58 f6 c4 02 0f 85 41 01 00 00 fb e9 47 ff ff ff 90 <0f> 0b 90 e9 0b ff ff ff e8 af 03 16 00 84 c0 0f 85 d6 fd ff ff e8
RSP: 0018:ffffc9000cdcfcb8 EFLAGS: 00010002
RAX: 000000000000000b RBX: ffffe8ffad336910 RCX: ffffffff815ef518
RDX: 00000000ffffffff RSI: 0000000000000004 RDI: ffffc9000cdcfd00
RBP: ffff88802234b848 R08: 0000000000000001 R09: fffff520019b9fa0
R10: 0000000000000003 R11: 0000000000000000 R12: 1ffff920019b9f98
R13: 0000000000000200 R14: ffffc9000cdcfd00 R15: ffff88802c33ec00
FS:  0000000000000000(0000) GS:ffff88802c000000(0063) knlGS:00000000f5f10b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007ff8d697ae18 CR3: 000000002a1fe000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sched_mm_cid_remote_clear_old kernel/sched/core.c:11907 [inline]
 task_mm_cid_work+0x39a/0x920 kernel/sched/core.c:11957
 task_work_run+0x14e/0x250 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218
 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf731e579
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:00000000f5f103b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000004
RAX: 0000000001000000 RBX: 0000000000000003 RCX: 00000000edaf0000
RDX: 0000000001000000 RSI: 00000000f7474ff4 RDI: 0000000000000000
RBP: 00000000f5f10460 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 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