Oops: general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
CPU: 1 UID: 0 PID: 29728 Comm: syz.9.8698 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:klist_put+0x4d/0x1b0 lib/klist.c:212
Code: c1 ea 03 80 3c 02 00 0f 85 5f 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 2e 01 00 00 4c 89 e7 4d 8b 74 24 58 e8 9c f2 0c
RSP: 0018:ffffc900046cf760 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88810508d460 RCX: 0000000000000000
RDX: 000000000000000b RSI: ffffffff8b5c62f5 RDI: 0000000000000058
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff20ccb44
R10: ffffffff90665a23 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: 1ffff920008d9ef4 R15: ffffffff906659e0
FS:  0000000000000000(0000) GS:ffff8880d6ad8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeeaffcc78 CR3: 0000000042ccf000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 klist_del lib/klist.c:230 [inline]
 klist_remove+0x13f/0x2e0 lib/klist.c:249
 device_move+0x12d/0x10d0 drivers/base/core.c:4615
 hci_conn_del_sysfs+0x81/0x180 net/bluetooth/hci_sysfs.c:75
 hci_conn_cleanup net/bluetooth/hci_conn.c:173 [inline]
 hci_conn_del+0x657/0x1180 net/bluetooth/hci_conn.c:1210
 hci_conn_hash_flush+0x186/0x260 net/bluetooth/hci_conn.c:2603
 hci_dev_close_sync+0x602/0x11d0 net/bluetooth/hci_sync.c:5303
 hci_dev_do_close+0x2e/0x90 net/bluetooth/hci_core.c:501
 hci_unregister_dev+0x227/0x640 net/bluetooth/hci_core.c:2715
 vhci_release+0x17d/0x230 drivers/bluetooth/hci_vhci.c:690
 __fput+0x402/0xb70 fs/file_table.c:468
 task_work_run+0x150/0x240 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x86f/0x2bf0 kernel/exit.c:966
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
 get_signal+0x2671/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x7c0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:40 [inline]
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 irqentry_exit_to_user_mode+0x176/0x310 kernel/entry/common.c:73
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f8e9b24f987
Code: Unable to access opcode bytes at 0x7f8e9b24f95d.
RSP: 002b:00007f8e9c2331a0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007f8e9b38efc9
RDX: 00007f8e9c2331c0 RSI: 00007f8e9c2332f0 RDI: 000000000000000b
RBP: 00007f8e9b411f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f8e9b5e6038 R14: 00007f8e9b5e5fa0 R15: 00007ffeeb001268
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:klist_put+0x4d/0x1b0 lib/klist.c:212
Code: c1 ea 03 80 3c 02 00 0f 85 5f 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 2e 01 00 00 4c 89 e7 4d 8b 74 24 58 e8 9c f2 0c
RSP: 0018:ffffc900046cf760 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88810508d460 RCX: 0000000000000000
RDX: 000000000000000b RSI: ffffffff8b5c62f5 RDI: 0000000000000058
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff20ccb44
R10: ffffffff90665a23 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: 1ffff920008d9ef4 R15: ffffffff906659e0
FS:  0000000000000000(0000) GS:ffff8880d6ad8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeeaffcc78 CR3: 0000000024cb3000 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 5f 01 00 00    	jne    0x16c
   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 2e 01 00 00    	jne    0x162
  34:	4c 89 e7             	mov    %r12,%rdi
  37:	4d 8b 74 24 58       	mov    0x58(%r12),%r14
  3c:	e8                   	.byte 0xe8
  3d:	9c                   	pushf
  3e:	f2                   	repnz
  3f:	0c                   	.byte 0xc