syzbot

Bluetooth: hci0: Opcode 0x0c1a failed: -4
Bluetooth: hci0: Opcode 0x0406 failed: -4
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: 9898 Comm: syz.5.1501 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:klist_put lib/klist.c:212 [inline]
RIP: 0010:klist_del lib/klist.c:230 [inline]
RIP: 0010:klist_remove+0x165/0x390 lib/klist.c:249
Code: 80 3c 04 00 74 08 4c 89 f7 e8 17 66 bb 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 f0 65 bb f7 49 8b 47 58 48 89 44 24 10 4c 89
RSP: 0018:ffffc90006227200 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff88807cc88000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058
RBP: ffffc90006227300 R08: ffffffff8e085c03 R09: 1ffffffff1c10b80
R10: dffffc0000000000 R11: fffffbfff1c10b81 R12: 1ffff11003c7258c
R13: dffffc0000000000 R14: ffff88801e392c60 R15: 0000000000000000
FS:  00007f26adae96c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c43f90c CR3: 000000007c631000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:1152
 hci_abort_conn_sync+0xb39/0xd40 net/bluetooth/hci_sync.c:5577
 hci_disconnect_all_sync net/bluetooth/hci_sync.c:5590 [inline]
 hci_suspend_sync+0x48a/0xdb0 net/bluetooth/hci_sync.c:6072
 hci_suspend_dev+0x199/0x320 net/bluetooth/hci_core.c:2831
 hci_suspend_notifier+0xc8/0x270 net/bluetooth/hci_core.c:2406
 notifier_call_chain kernel/notifier.c:87 [inline]
 notifier_call_chain_robust+0xe1/0x2c0 kernel/notifier.c:122
 blocking_notifier_call_chain_robust+0x66/0x90 kernel/notifier.c:347
 pm_notifier_call_chain_robust+0x28/0x60 kernel/power/main.c:90
 snapshot_open+0x19b/0x280 kernel/power/user.c:77
 misc_open+0x31f/0x390 drivers/char/misc.c:145
 chrdev_open+0x5c5/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x7e9/0x10d0 fs/open.c:882
 do_open fs/namei.c:3634 [inline]
 path_openat+0x2635/0x2ee0 fs/namei.c:3791
 do_filp_open+0x1f1/0x430 fs/namei.c:3818
 do_sys_openat2+0x150/0x4b0 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1347
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f26acb9aeb9
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:00007f26adae9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f26ace15fa0 RCX: 00007f26acb9aeb9
RDX: 0000000000047e00 RSI: 0000200000000680 RDI: ffffffffffffff9c
RBP: 00007f26acc08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000019 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26ace16038 R14: 00007f26ace15fa0 R15: 00007fff5b744708
 </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+0x165/0x390 lib/klist.c:249
Code: 80 3c 04 00 74 08 4c 89 f7 e8 17 66 bb 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 f0 65 bb f7 49 8b 47 58 48 89 44 24 10 4c 89
RSP: 0018:ffffc90006227200 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff88807cc88000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058
RBP: ffffc90006227300 R08: ffffffff8e085c03 R09: 1ffffffff1c10b80
R10: dffffc0000000000 R11: fffffbfff1c10b81 R12: 1ffff11003c7258c
R13: dffffc0000000000 R14: ffff88801e392c60 R15: 0000000000000000
FS:  00007f26adae96c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34f14ff8 CR3: 000000007c631000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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 17 66 bb f7       	call   0xf7bb6625
   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 f0 65 bb f7       	call   0xf7bb6625
  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