BUG: unable to handle kernel NULL pointer dereference at 0000000000000030
PGD 95205067 P4D 95205067 PUD 9e06f067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1713 Comm: kworker/u5:0 Not tainted 4.19.162-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci4 hci_rx_work
RIP: 0010:set_bit arch/x86/include/asm/bitops.h:71 [inline]
RIP: 0010:amp_read_loc_assoc_final_data+0x102/0x1d0 net/bluetooth/amp.c:312
Code: fc ff df 0f b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 ae 00 00 00 41 0f b7 84 24 9c 03 00 00 66 89 44 24 23 <f0> 41 80 4d 30 04 48 8d 6c 24 40 4c 89 e6 48 89 ef e8 08 35 fe ff
RSP: 0018:ffff8880b25cf978 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff110164b9f2f RCX: 1ffff110164b8533
RDX: 0000000000000000 RSI: ffffffff8765aede RDI: ffff888057d1149c
RBP: ffff8880a14a4e80 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888057d11100
R13: 0000000000000000 R14: ffff888057d12040 R15: ffff888057d11100
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000030 CR3: 00000000af3c2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hci_chan_selected_evt+0x1ef/0x3e0 net/bluetooth/hci_event.c:4655
 hci_event_packet+0x2a4a/0x7e19 net/bluetooth/hci_event.c:5907
 hci_rx_work+0x4ad/0xc70 net/bluetooth/hci_core.c:4359
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Modules linked in:
CR2: 0000000000000030
---[ end trace d73c808f7d572570 ]---
RIP: 0010:set_bit arch/x86/include/asm/bitops.h:71 [inline]
RIP: 0010:amp_read_loc_assoc_final_data+0x102/0x1d0 net/bluetooth/amp.c:312
Code: fc ff df 0f b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 ae 00 00 00 41 0f b7 84 24 9c 03 00 00 66 89 44 24 23 <f0> 41 80 4d 30 04 48 8d 6c 24 40 4c 89 e6 48 89 ef e8 08 35 fe ff
RSP: 0018:ffff8880b25cf978 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff110164b9f2f RCX: 1ffff110164b8533
RDX: 0000000000000000 RSI: ffffffff8765aede RDI: ffff888057d1149c
RBP: ffff8880a14a4e80 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888057d11100
R13: 0000000000000000 R14: ffff888057d12040 R15: ffff888057d11100
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000030 CR3: 00000000af3c2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400