Oops: general protection fault, probably for non-canonical address 0xdffffc0000000151: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000a88-0x0000000000000a8f]
CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210
Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 c0 bf 79 09 cc 66 66 66 66 66 66 2e
RSP: 0018:ffffc90004af7840 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffffffff8babdd3e RCX: 0000000000000005
RDX: 0000000000000000 RSI: ffffffff8babdd3e RDI: 0000000000000151
RBP: ffffffff8bab7da8 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff5200095ef24 R12: 0000000000000000
R13: 0000000000000a88 R14: 0000000000000a88 R15: 0000000000000001
FS:  00007f4234a5a6c0(0000) GS:ffff88808c88b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4234a59fe8 CR3: 0000000039c9d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __kasan_check_byte+0x12/0x40 mm/kasan/common.c:573
 kasan_check_byte include/linux/kasan.h:402 [inline]
 lock_acquire+0x84/0x350 kernel/locking/lockdep.c:5842
 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158
 class_raw_spinlock_constructor include/linux/spinlock.h:535 [inline]
 remove_waiter+0x138/0xb10 kernel/locking/rtmutex.c:1561
 rt_mutex_start_proxy_lock+0x10a/0x230 kernel/locking/rtmutex_api.c:369
 futex_requeue+0xfb5/0x1c90 kernel/futex/requeue.c:643
 do_futex+0x362/0x420 kernel/futex/syscalls.c:-1
 __do_sys_futex kernel/futex/syscalls.c:207 [inline]
 __se_sys_futex+0x3a8/0x450 kernel/futex/syscalls.c:188
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4233b9cdd9
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:00007f4234a59fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f4233e16180 RCX: 00007f4233b9cdd9
RDX: 0000000000000001 RSI: 000000000000000c RDI: 000020000000cffc
RBP: 00007f4233c32d69 R08: 0000200000048000 R09: 0000000000000000
R10: 0000200000000280 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4233e16218 R14: 00007f4233e16180 R15: 00007ffe63411468
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210
Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 c0 bf 79 09 cc 66 66 66 66 66 66 2e
RSP: 0018:ffffc90004af7840 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffffffff8babdd3e RCX: 0000000000000005
RDX: 0000000000000000 RSI: ffffffff8babdd3e RDI: 0000000000000151
RBP: ffffffff8bab7da8 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff5200095ef24 R12: 0000000000000000
R13: 0000000000000a88 R14: 0000000000000a88 R15: 0000000000000001
FS:  00007f4234a5a6c0(0000) GS:ffff88808c88b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4234a59fe8 CR3: 0000000039c9d000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess), 4 bytes skipped:
   0:	0f 1f 40 00          	nopl   0x0(%rax)
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	0f 1f 40 d6          	nopl   -0x2a(%rax)
  18:	48 c1 ef 03          	shr    $0x3,%rdi
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
* 26:	0f b6 04 07          	movzbl (%rdi,%rax,1),%eax <-- trapping instruction
  2a:	3c 08                	cmp    $0x8,%al
  2c:	0f 92 c0             	setb   %al
  2f:	e9 c0 bf 79 09       	jmp    0x979bff4
  34:	cc                   	int3
  35:	66                   	data16
  36:	66                   	data16
  37:	66                   	data16
  38:	66                   	data16
  39:	66                   	data16
  3a:	66                   	data16
  3b:	2e                   	cs