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: 10476 Comm: syz.1.567 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
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:ffffc900066d70e0 EFLAGS: 00010003
RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60
RBP: ffffc900066d72c8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff8199feb0 R12: ffff8880b863c658
R13: ffff888125a6b000 R14: 1ffff110170c7922 R15: 0000000000000014
FS:  000055557440f500(0000) GS:ffff888125a6b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1bca435f88 CR3: 000000002aae0000 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_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:681
RIP: 0010:__sanitizer_cov_trace_pc+0x6b/0x80 kernel/kcov.c:235
Code: e0 16 00 00 83 fa 02 75 21 48 8b 91 e8 16 00 00 48 8b 32 48 8d 7e 01 8b 89 e4 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 <e9> 50 f1 7b 09 cc 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90
RSP: 0018:ffffc900066d73f8 EFLAGS: 00000293
RAX: ffffffff8217b3d4 RBX: 0000000000000001 RCX: ffff8880254bdd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffea00014ee600 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f9e71f R12: ffff88805af8aa00
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
 trace_rss_stat include/trace/events/kmem.h:427 [inline]
 mm_trace_rss_stat+0x84/0x200 mm/memory.c:169
 inc_mm_counter include/linux/mm.h:3367 [inline]
 insert_page_into_pte_locked+0x67f/0x820 mm/memory.c:2385
 insert_page+0x24e/0x3b0 mm/memory.c:2406
 kcov_mmap+0xcb/0x140 kernel/kcov.c:525
 vfs_mmap include/linux/fs.h:2066 [inline]
 mmap_file mm/internal.h:167 [inline]
 __mmap_new_file_vma mm/vma.c:2496 [inline]
 __mmap_new_vma mm/vma.c:2562 [inline]
 __mmap_region mm/vma.c:2774 [inline]
 mmap_region+0x199c/0x2220 mm/vma.c:2860
 do_mmap+0xc2f/0x10c0 mm/mmap.c:560
 vm_mmap_pgoff+0x2cc/0x4f0 mm/util.c:581
 ksys_mmap_pgoff+0x4e8/0x720 mm/mmap.c:606
 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: 0033:0x7f252112cbc2
Code: 4f 01 00 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 3b 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 6e 5b 5d c3 0f 1f 00 48 c7 c0 e8 ff ff ff 64
RSP: 002b:00007ffc8023eaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f251eaf8000 RCX: 00007f252112cbc2
RDX: 0000000000000003 RSI: 0000000000400000 RDI: 00007f251eaf8000
RBP: 0000000000000011 R08: 00000000000000dc R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000206 R12: 0000000000000003
R13: 0000000000000004 R14: 0000000000000000 R15: 00007f25213a5fa0
 </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:ffffc900066d70e0 EFLAGS: 00010003
RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60
RBP: ffffc900066d72c8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff8199feb0 R12: ffff8880b863c658
R13: ffff888125a6b000 R14: 1ffff110170c7922 R15: 0000000000000014
FS:  000055557440f500(0000) GS:ffff888125a6b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1bca435f88 CR3: 000000002aae0000 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