syzbot

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notifier callback hci_suspend_notifier already registered
WARNING: CPU: 1 PID: 5144 at kernel/notifier.c:28 notifier_chain_register kernel/notifier.c:28 [inline]
WARNING: CPU: 1 PID: 5144 at kernel/notifier.c:28 notifier_chain_register+0x156/0x210 kernel/notifier.c:22
Modules linked in:
CPU: 1 PID: 5144 Comm: syz-executor373 Not tainted 6.0.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:notifier_chain_register kernel/notifier.c:28 [inline]
RIP: 0010:notifier_chain_register+0x156/0x210 kernel/notifier.c:22
Code: 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 a5 00 00 00 49 8b 75 00 48 c7 c7 00 dc eb 89 e8 17 01 ea 07 <0f> 0b 41 bc ef ff ff ff e8 4d 33 2b 00 44 89 e0 48 83 c4 18 5b 5d
RSP: 0018:ffffc90004bf7ca8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880262f5108 RCX: 0000000000000000
RDX: ffff88807aa2c1c0 RSI: ffffffff81611e08 RDI: fffff5200097ef87
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880262f5108 R14: ffff8880731e9110 R15: dffffc0000000000
FS:  0000555556457300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000280 CR3: 0000000077ac8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __blocking_notifier_chain_register kernel/notifier.c:266 [inline]
 blocking_notifier_chain_register+0x6f/0xc0 kernel/notifier.c:284
 hci_register_suspend_notifier net/bluetooth/hci_core.c:2749 [inline]
 hci_register_suspend_notifier+0x9d/0xc0 net/bluetooth/hci_core.c:2743
 hci_sock_bind+0x14b1/0x1760 net/bluetooth/hci_sock.c:1234
 __sys_bind+0x1e9/0x250 net/socket.c:1776
 __do_sys_bind net/socket.c:1787 [inline]
 __se_sys_bind net/socket.c:1785 [inline]
 __x64_sys_bind+0x6f/0xb0 net/socket.c:1785
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f96a8c094a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd0e811388 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f96a8c094a9
RDX: 0000000000000006 RSI: 0000000020000280 RDI: 0000000000000004
RBP: 0000000000000003 R08: 0000000000000150 R09: 0000000000000150
R10: 0000000000000000 R11: 0000000000000246 R12: 00005555564572b8
R13: 0000000000000011 R14: 00007ffd0e8113f0 R15: 00007ffd0e8113a8
 </TASK>