Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 UID: 0 PID: 5923 Comm: syz.3.30 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:task_cpu include/linux/sched.h:2268 [inline]
RIP: 0010:is_task_rq_idle kernel/sched/core.c:6169 [inline]
RIP: 0010:cookie_equals kernel/sched/core.c:6174 [inline]
RIP: 0010:pick_next_task kernel/sched/core.c:6355 [inline]
RIP: 0010:__schedule+0x4030/0x5550 kernel/sched/core.c:7143
Code: 24 80 00 00 00 e8 80 67 fc f6 48 8b 84 24 80 00 00 00 48 8b 18 4c 8d 7b 14 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 87 04 00 00 45 8b 3f 49 83 ff 08 0f 83 98
RSP: 0018:ffffc9000623f7a0 EFLAGS: 00010003
RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60
RBP: ffffc9000623f998 R08: ffffffff8f8d70f7 R09: 1ffffffff1f1ae1e
R10: dffffc0000000000 R11: fffffbfff1f1ae1f R12: ffff8880b863c658
R13: ffff888125eb8000 R14: 1ffff110170c7922 R15: 0000000000000014
FS:  0000000000000000(0000) GS:ffff888125eb8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000182000 CR3: 0000000039b70000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7552
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8c0 kernel/entry/common.c:167
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679
RIP: 0010:cgroup_task_exit+0xa5/0x130 kernel/cgroup/cgroup.c:7062
Code: 00 00 00 4c 89 fe e8 6a aa 08 00 49 83 ff 0e 77 67 e8 ff a4 08 00 4e 8d 3c fd 60 b8 00 8e 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 ff e8 c1 7c 74 00 4d 8b 3f 49 83 ef 80 4c 89 f8 48 c1
RSP: 0018:ffffc9000623fac8 EFLAGS: 00000246
RAX: 1ffffffff1c0170f RBX: ffff88802f249f00 RCX: ffff88802f249f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000100000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1005e493e1 R12: dffffc0000000000
R13: 0000000000000018 R14: 0000000000000003 R15: ffffffff8e00b878
 do_exit+0x71f/0x22c0 kernel/exit.c:1008
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1147
 get_signal+0x1284/0x1330 kernel/signal.c:3038
 arch_do_signal_or_restart+0xbc/0x840 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x104/0x710 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe0aa85ce59
Code: Unable to access opcode bytes at 0x7fe0aa85ce2f.
RSP: 002b:00007fe0a82260e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe0aaad6368 RCX: 00007fe0aa85ce59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe0aaad6368
RBP: 00007fe0aaad6360 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe0aaad63f8 R14: 00007fffaca8bfe0 R15: 00007fffaca8c0c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:task_cpu include/linux/sched.h:2268 [inline]
RIP: 0010:is_task_rq_idle kernel/sched/core.c:6169 [inline]
RIP: 0010:cookie_equals kernel/sched/core.c:6174 [inline]
RIP: 0010:pick_next_task kernel/sched/core.c:6355 [inline]
RIP: 0010:__schedule+0x4030/0x5550 kernel/sched/core.c:7143
Code: 24 80 00 00 00 e8 80 67 fc f6 48 8b 84 24 80 00 00 00 48 8b 18 4c 8d 7b 14 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 87 04 00 00 45 8b 3f 49 83 ff 08 0f 83 98
RSP: 0018:ffffc9000623f7a0 EFLAGS: 00010003
RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60
RBP: ffffc9000623f998 R08: ffffffff8f8d70f7 R09: 1ffffffff1f1ae1e
R10: dffffc0000000000 R11: fffffbfff1f1ae1f R12: ffff8880b863c658
R13: ffff888125eb8000 R14: 1ffff110170c7922 R15: 0000000000000014
FS:  0000000000000000(0000) GS:ffff888125eb8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000182000 CR3: 0000000039b70000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	24 80                	and    $0x80,%al
   2:	00 00                	add    %al,(%rax)
   4:	00 e8                	add    %ch,%al
   6:	80 67 fc f6          	andb   $0xf6,-0x4(%rdi)
   a:	48 8b 84 24 80 00 00 	mov    0x80(%rsp),%rax
  11:	00
  12:	48 8b 18             	mov    (%rax),%rbx
  15:	4c 8d 7b 14          	lea    0x14(%rbx),%r15
  19:	4c 89 f8             	mov    %r15,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 87 04 00 00    	jne    0x4bd
  36:	45 8b 3f             	mov    (%r15),%r15d
  39:	49 83 ff 08          	cmp    $0x8,%r15
  3d:	0f                   	.byte 0xf
  3e:	83                   	.byte 0x83
  3f:	98                   	cwtl