Oops: general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
CPU: 0 UID: 0 PID: 5287 Comm: kworker/u33:1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: hci2 hci_cmd_sync_work
RIP: 0010:klist_put+0x4d/0x1d0 lib/klist.c:212
Code: c1 ea 03 80 3c 02 00 0f 85 74 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 23 49 83 e4 fe 49 8d 7c 24 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 43 01 00 00 4c 89 e7 4d 8b 74 24 58 e8 dc 09 0d
RSP: 0018:ffffc90005c578c0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88805c6b5060 RCX: 0000000000000000
RDX: 000000000000000b RSI: ffffffff8b855295 RDI: 0000000000000058
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff2178cfc
R10: ffffffff90bc67e3 R11: 000000000000760b R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff90bc67a0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880d6348000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc5873456b8 CR3: 000000004c39e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 klist_del lib/klist.c:230 [inline]
 klist_remove+0x14c/0x2e0 lib/klist.c:249
 device_move+0x12d/0x1140 drivers/base/core.c:4615
 hci_conn_del_sysfs+0x86/0x1a0 net/bluetooth/hci_sysfs.c:75
 hci_conn_cleanup net/bluetooth/hci_conn.c:173 [inline]
 hci_conn_del+0x506/0x1180 net/bluetooth/hci_conn.c:1240
 hci_abort_conn_sync+0x7d9/0xb20 net/bluetooth/hci_sync.c:5753
 abort_conn_sync+0x142/0x350 net/bluetooth/hci_conn.c:3074
 hci_cmd_sync_work+0x1c0/0x470 net/bluetooth/hci_sync.c:332
 process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
 process_scheduled_works kernel/workqueue.c:3358 [inline]
 worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
 kthread+0x370/0x450 kernel/kthread.c:467
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:klist_put+0x4d/0x1d0 lib/klist.c:212
Code: c1 ea 03 80 3c 02 00 0f 85 74 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 23 49 83 e4 fe 49 8d 7c 24 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 43 01 00 00 4c 89 e7 4d 8b 74 24 58 e8 dc 09 0d
RSP: 0018:ffffc90005c578c0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88805c6b5060 RCX: 0000000000000000
RDX: 000000000000000b RSI: ffffffff8b855295 RDI: 0000000000000058
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff2178cfc
R10: ffffffff90bc67e3 R11: 000000000000760b R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff90bc67a0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880d6348000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc5873456b8 CR3: 000000000e598000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	c1 ea 03             	shr    $0x3,%edx
   3:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   7:	0f 85 74 01 00 00    	jne    0x181
   d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  14:	fc ff df
  17:	4c 8b 23             	mov    (%rbx),%r12
  1a:	49 83 e4 fe          	and    $0xfffffffffffffffe,%r12
  1e:	49 8d 7c 24 58       	lea    0x58(%r12),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 43 01 00 00    	jne    0x177
  34:	4c 89 e7             	mov    %r12,%rdi
  37:	4d 8b 74 24 58       	mov    0x58(%r12),%r14
  3c:	e8                   	.byte 0xe8
  3d:	dc 09                	fmull  (%rcx)
  3f:	0d                   	.byte 0xd