BUG: kernel NULL pointer dereference, address: 0000000000000917
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 1552 Comm: kworker/u5:0 Not tainted 5.10.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
RIP: 0010:hci_send_acl+0x20/0x160 net/bluetooth/hci_core.c:4211
Code: c3 66 0f 1f 84 00 00 00 00 00 41 57 49 89 ff 41 56 49 89 f6 41 55 41 54 55 53 89 d3 0f b7 d2 48 83 ec 10 4c 8b 67 18 8b 46 74 <49> 8b ac 24 18 09 00 00 c7 46 74 00 00 00 00 29 46 70 c6 46 28 02
RSP: 0018:ffffc90003567ce0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffff88811d920000
RDX: 0000000000000002 RSI: ffff88810963e600 RDI: ffff88811d8a0480
RBP: ffffc90003567e00 R08: 00000000000000c0 R09: ffff88811d885200
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffffffffffff
R13: ffff88811d8a6a11 R14: ffff88810963e600 R15: ffff88811d8a0480
FS:  0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000917 CR3: 000000011d957000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 l2cap_send_move_chan_cfm_icid+0x46/0x70 net/bluetooth/l2cap_core.c:4916
 l2cap_move_fail net/bluetooth/l2cap_core.c:5400 [inline]
 l2cap_move_channel_rsp net/bluetooth/l2cap_core.c:5439 [inline]
 l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:5718 [inline]
 l2cap_sig_channel net/bluetooth/l2cap_core.c:6417 [inline]
 l2cap_recv_frame+0xbe3/0x2e40 net/bluetooth/l2cap_core.c:7660
 hci_acldata_packet net/bluetooth/hci_core.c:4740 [inline]
 hci_rx_work+0x1d3/0x500 net/bluetooth/hci_core.c:4931
 process_one_work+0x273/0x600 kernel/workqueue.c:2272
 worker_thread+0x38/0x380 kernel/workqueue.c:2418
 kthread+0x145/0x170 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Modules linked in:
CR2: 0000000000000917
---[ end trace 9c2b8932f12c668a ]---
RIP: 0010:hci_send_acl+0x20/0x160 net/bluetooth/hci_core.c:4211
Code: c3 66 0f 1f 84 00 00 00 00 00 41 57 49 89 ff 41 56 49 89 f6 41 55 41 54 55 53 89 d3 0f b7 d2 48 83 ec 10 4c 8b 67 18 8b 46 74 <49> 8b ac 24 18 09 00 00 c7 46 74 00 00 00 00 29 46 70 c6 46 28 02
RSP: 0018:ffffc90003567ce0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffff88811d920000
RDX: 0000000000000002 RSI: ffff88810963e600 RDI: ffff88811d8a0480
RBP: ffffc90003567e00 R08: 00000000000000c0 R09: ffff88811d885200
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffffffffffff
R13: ffff88811d8a6a11 R14: ffff88810963e600 R15: ffff88811d8a0480
FS:  0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000917 CR3: 000000011d957000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400