syzbot

general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
CPU: 1 PID: 8891 Comm: syz.5.1228 Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:klist_put lib/klist.c:212 [inline]
RIP: 0010:klist_del lib/klist.c:230 [inline]
RIP: 0010:klist_remove+0x158/0x380 lib/klist.c:249
Code: 80 3c 04 00 74 08 4c 89 f7 e8 04 a6 ce f7 4d 8b 3e 49 83 e7 fe 49 8d 7f 58 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 dd a5 ce f7 49 8b 47 58 48 89 44 24 10 4c 89
RSP: 0018:ffffc9000553f8c0 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff888027d00000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058
RBP: ffffc9000553f9c0 R08: dffffc0000000000 R09: fffffbfff1c0fec1
R10: fffffbfff1c0fec1 R11: 1ffffffff1c0fec0 R12: 1ffff1100ac0408c
R13: dffffc0000000000 R14: ffff888056020460 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd7c2a89188 CR3: 000000007fba4000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 device_move+0x18f/0x6f0 drivers/base/core.c:4633
 hci_conn_del_sysfs+0xab/0x160 net/bluetooth/hci_sysfs.c:73
 hci_conn_cleanup+0x575/0x730 net/bluetooth/hci_conn.c:172
 hci_conn_del+0x515/0x720 net/bluetooth/hci_conn.c:1151
 hci_conn_hash_flush+0x203/0x290 net/bluetooth/hci_conn.c:2510
 hci_dev_close_sync+0x930/0xf40 net/bluetooth/hci_sync.c:5232
 hci_dev_do_close net/bluetooth/hci_core.c:510 [inline]
 hci_unregister_dev+0x202/0x4f0 net/bluetooth/hci_core.c:2705
 vhci_release+0x7f/0xd0 drivers/bluetooth/hci_vhci.c:573
 __fput+0x22c/0x920 fs/file_table.c:320
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x93e/0x2400 kernel/exit.c:880
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 __do_sys_exit_group kernel/exit.c:1033 [inline]
 __se_sys_exit_group kernel/exit.c:1031 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1031
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa51d38ebe9
Code: Unable to access opcode bytes at 0x7fa51d38ebbf.
RSP: 002b:00007ffc27c40c28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa51d38ebe9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc27c40c8c R08: 0000000c27c40d1f R09: 00000000000927c0
R10: 000000000000961c R11: 0000000000000246 R12: 0000000000000006
R13: 00000000000927c0 R14: 000000000008a9f3 R15: 00007ffc27c40ce0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:klist_put lib/klist.c:212 [inline]
RIP: 0010:klist_del lib/klist.c:230 [inline]
RIP: 0010:klist_remove+0x158/0x380 lib/klist.c:249
Code: 80 3c 04 00 74 08 4c 89 f7 e8 04 a6 ce f7 4d 8b 3e 49 83 e7 fe 49 8d 7f 58 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 dd a5 ce f7 49 8b 47 58 48 89 44 24 10 4c 89
RSP: 0018:ffffc9000553f8c0 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff888027d00000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058
RBP: ffffc9000553f9c0 R08: dffffc0000000000 R09: fffffbfff1c0fec1
R10: fffffbfff1c0fec1 R11: 1ffffffff1c0fec0 R12: 1ffff1100ac0408c
R13: dffffc0000000000 R14: ffff888056020460 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f442c90de9c CR3: 000000007f963000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
   0:	80 3c 04 00          	cmpb   $0x0,(%rsp,%rax,1)
   4:	74 08                	je     0xe
   6:	4c 89 f7             	mov    %r14,%rdi
   9:	e8 04 a6 ce f7       	call   0xf7cea612
   e:	4d 8b 3e             	mov    (%r14),%r15
  11:	49 83 e7 fe          	and    $0xfffffffffffffffe,%r15
  15:	49 8d 7f 58          	lea    0x58(%r15),%rdi
  19:	48 89 f8             	mov    %rdi,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 05                	je     0x35
  30:	e8 dd a5 ce f7       	call   0xf7cea612
  35:	49 8b 47 58          	mov    0x58(%r15),%rax
  39:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
  3e:	4c                   	rex.WR
  3f:	89                   	.byte 0x89