general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 31545 Comm: syz-executor.1 Not tainted 5.16.0-rc5-next-20211220-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:set_task_ioprio+0x2de/0x620 block/blk-ioc.c:289
Code: 4c 8b ab 18 12 00 00 4d 85 ed 0f 84 9b 01 00 00 e8 b7 fd a4 fd 49 8d 7d 0c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 ef
RSP: 0018:ffffc9000c987e90 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff8880a61f9d40 RCX: ffffc90004822000
RDX: 0000000000000001 RSI: ffffffff83d31899 RDI: 000000000000000c
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ffab957
R10: 0000000000000001 R11: 0000000000000120 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880a61fa688 R15: ffff8880a61faf58
FS:  00007ff7019f6700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff70301d7e0 CR3: 000000003a0dd000 CR4: 00000000003506f0
DR0: 0080ffff00000000 DR1: 0080ffff00000000 DR2: 0080ffff00000000
DR3: 0080ffff00000000 DR6: 00000000ffff0ff0 DR7: 00000000dddd06aa
Call Trace:
 <TASK>
 __do_sys_ioprio_set+0x586/0xae0 block/ioprio.c:124
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff703080e99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff7019f6168 EFLAGS: 00000246 ORIG_RAX: 00000000000000fb
RAX: ffffffffffffffda RBX: 00007ff703193f60 RCX: 00007ff703080e99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ff7030daff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff41cad05f R14: 00007ff7019f6300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:set_task_ioprio+0x2de/0x620 block/blk-ioc.c:289
Code: 4c 8b ab 18 12 00 00 4d 85 ed 0f 84 9b 01 00 00 e8 b7 fd a4 fd 49 8d 7d 0c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 ef
RSP: 0018:ffffc9000c987e90 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff8880a61f9d40 RCX: ffffc90004822000
RDX: 0000000000000001 RSI: ffffffff83d31899 RDI: 000000000000000c
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ffab957
R10: 0000000000000001 R11: 0000000000000120 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880a61fa688 R15: ffff8880a61faf58
FS:  00007ff7019f6700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff70301d7e0 CR3: 000000003a0dd000 CR4: 00000000003506f0
DR0: 0080ffff00000000 DR1: 0080ffff00000000 DR2: 0080ffff00000000
DR3: 0080ffff00000000 DR6: 00000000ffff0ff0 DR7: 00000000dddd06aa
----------------
Code disassembly (best guess):
   0:	4c 8b ab 18 12 00 00 	mov    0x1218(%rbx),%r13
   7:	4d 85 ed             	test   %r13,%r13
   a:	0f 84 9b 01 00 00    	je     0x1ab
  10:	e8 b7 fd a4 fd       	callq  0xfda4fdcc
  15:	49 8d 7d 0c          	lea    0xc(%r13),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx <-- trapping instruction
  2e:	48 89 f8             	mov    %rdi,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 01             	add    $0x1,%eax
  37:	38 d0                	cmp    %dl,%al
  39:	7c 08                	jl     0x43
  3b:	84 d2                	test   %dl,%dl
  3d:	0f                   	.byte 0xf
  3e:	85 ef                	test   %ebp,%edi