BUG: unable to handle kernel paging request at ffffffffffffff6c
PGD 9e6e067 P4D 9e6e067 PUD 9e70067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8114 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline]
RIP: 0010:wait_consider_task+0xae/0x3910 kernel/exit.c:1333
Code: 8e 6c 04 00 00 48 89 c8 48 89 4c 24 10 48 c1 e8 03 0f b6 14 28 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4b 1c 00 00 <45> 8b a6 6c 04 00 00 bf 10 00 00 00 44 89 e6 e8 1e 1c 2a 00 41 83
RSP: 0018:ffff8880908d7b00 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffffffff6c
RDX: 0000000000000000 RSI: ffffffff81386a82 RDI: ffff8880908d7d00
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880908d7d00
R13: ffff8880a1244600 R14: fffffffffffffb00 R15: ffff8880a1244af0
FS:  00005555560a7400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 00000000a0185000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1442 [inline]
 do_wait+0x429/0x9c0 kernel/exit.c:1513
 kernel_wait4+0x14c/0x260 kernel/exit.c:1655
 __do_sys_wait4 kernel/exit.c:1667 [inline]
 __se_sys_wait4+0x149/0x160 kernel/exit.c:1663
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f4e720a1337
Code: 89 7c 24 10 48 89 4c 24 18 e8 35 50 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 65 50 02 00 8b 44
RSP: 002b:00007ffc32f9f820 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000000006ff RCX: 00007f4e720a1337
RDX: 0000000040000001 RSI: 00007ffc32f9f8ac RDI: 00000000ffffffff
RBP: 00007ffc32f9f8ac R08: 0000000000000000 R09: 000000db9b877c85
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000000d079a R14: 000000000000000c R15: 00007ffc32f9f910
Modules linked in:
CR2: ffffffffffffff6c
---[ end trace 8eae429c6066962c ]---
RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline]
RIP: 0010:wait_consider_task+0xae/0x3910 kernel/exit.c:1333
Code: 8e 6c 04 00 00 48 89 c8 48 89 4c 24 10 48 c1 e8 03 0f b6 14 28 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4b 1c 00 00 <45> 8b a6 6c 04 00 00 bf 10 00 00 00 44 89 e6 e8 1e 1c 2a 00 41 83
RSP: 0018:ffff8880908d7b00 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffffffff6c
RDX: 0000000000000000 RSI: ffffffff81386a82 RDI: ffff8880908d7d00
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880908d7d00
R13: ffff8880a1244600 R14: fffffffffffffb00 R15: ffff8880a1244af0
FS:  00005555560a7400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 00000000a0185000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8e 6c 04 00          	mov    0x0(%rsp,%rax,1),%gs
   4:	00 48 89             	add    %cl,-0x77(%rax)
   7:	c8 48 89 4c          	enterq $0x8948,$0x4c
   b:	24 10                	and    $0x10,%al
   d:	48 c1 e8 03          	shr    $0x3,%rax
  11:	0f b6 14 28          	movzbl (%rax,%rbp,1),%edx
  15:	48 89 c8             	mov    %rcx,%rax
  18:	83 e0 07             	and    $0x7,%eax
  1b:	83 c0 03             	add    $0x3,%eax
  1e:	38 d0                	cmp    %dl,%al
  20:	7c 08                	jl     0x2a
  22:	84 d2                	test   %dl,%dl
  24:	0f 85 4b 1c 00 00    	jne    0x1c75
* 2a:	45 8b a6 6c 04 00 00 	mov    0x46c(%r14),%r12d <-- trapping instruction
  31:	bf 10 00 00 00       	mov    $0x10,%edi
  36:	44 89 e6             	mov    %r12d,%esi
  39:	e8 1e 1c 2a 00       	callq  0x2a1c5c
  3e:	41                   	rex.B
  3f:	83                   	.byte 0x83