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: 8980 Comm: syz.1.1357 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 97 f2 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:ffffc900067e6f60 EFLAGS: 00010003
RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60
RBP: ffffc900067e7148 R08: ffffffff8fcf38f7 R09: 1ffffffff1f9e71e
R10: dffffc0000000000 R11: ffffffff8199feb0 R12: ffff8880b863c658
R13: ffff888125a6b000 R14: 1ffff110170c7922 R15: 0000000000000014
FS:  00007ff110ad66c0(0000) GS:ffff888125a6b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f19caa87cc0 CR3: 000000004151c000 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_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:103 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline]
RIP: 0010:unwind_next_frame+0x515/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 <4c> 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8
RSP: 0018:ffffc900067e7278 EFLAGS: 00000246
RAX: fffffffff233c0cc RBX: ffffffff8fefdeac RCX: dffffc0000000000
RDX: ffffffff8fefdeac RSI: ffffffff906b9c28 RDI: ffffffff8bcc4d20
RBP: ffffffff8fefdeac R08: 0000000000000001 R09: ffffffff8e3cb2a0
R10: ffffc900067e7398 R11: ffffffff81b0ac80 R12: ffffffff8223a0fc
R13: ffffffff8fefdeac R14: ffffc900067e7348 R15: ffffffff8fefdeac
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:341
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1859
 prep_new_page mm/page_alloc.c:1867 [inline]
 get_page_from_freelist+0x265c/0x26e0 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5304
 alloc_slab_page mm/slub.c:3288 [inline]
 allocate_slab+0x76/0x5d0 mm/slub.c:3406
 new_slab mm/slub.c:3452 [inline]
 refill_objects+0x2d9/0x350 mm/slub.c:7333
 refill_sheaf mm/slub.c:2826 [inline]
 __pcs_replace_empty_main+0x331/0x690 mm/slub.c:4698
 alloc_from_pcs mm/slub.c:4796 [inline]
 slab_alloc_node mm/slub.c:4929 [inline]
 __do_kmalloc_node mm/slub.c:5356 [inline]
 __kmalloc_noprof+0x56d/0x7e0 mm/slub.c:5382
 _kmalloc_noprof include/linux/slab.h:973 [inline]
 io_cache_alloc_new+0x40/0x100 io_uring/alloc_cache.c:40
 io_cache_alloc io_uring/alloc_cache.h:61 [inline]
 io_uring_alloc_async_data io_uring/io_uring.h:355 [inline]
 io_uring_cmd_prep+0x3ab/0x5d0 io_uring/uring_cmd.c:208
 io_init_req io_uring/io_uring.c:1843 [inline]
 io_submit_sqe io_uring/io_uring.c:1890 [inline]
 io_submit_sqes+0xbd3/0x22e0 io_uring/io_uring.c:2058
 __do_sys_io_uring_enter io_uring/io_uring.c:2649 [inline]
 __se_sys_io_uring_enter+0x34a/0x1c40 io_uring/io_uring.c:2598
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff11287ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff110ad5f38 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 0000200000000340 RCX: 00007ff11287ce59
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000008
RBP: 00000000000000ec R08: 0000000000000000 R09: 0000000000000008
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000800
R13: 0000200000000808 R14: 0000000000000e26 R15: 0000000000000000
 </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 97 f2 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:ffffc900067e6f60 EFLAGS: 00010003
RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60
RBP: ffffc900067e7148 R08: ffffffff8fcf38f7 R09: 1ffffffff1f9e71e
R10: dffffc0000000000 R11: ffffffff8199feb0 R12: ffff8880b863c658
R13: ffff888125a6b000 R14: 1ffff110170c7922 R15: 0000000000000014
FS:  00007ff110ad66c0(0000) GS:ffff888125a6b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f19caa87cc0 CR3: 000000004151c000 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 97 f2 f6 48 8b 84 	adcb   $0x84,-0x74b7090e(%rdi)
   d:	24 80                	and    $0x80,%al
   f:	00 00                	add    %al,(%rax)
  11:	00 48 8b             	add    %cl,-0x75(%rax)
  14:	18 4c 8d 7b          	sbb    %cl,0x7b(%rbp,%rcx,4)
  18:	14 4c                	adc    $0x4c,%al
  1a:	89 f8                	mov    %edi,%eax
  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