Bluetooth: hci0: sending frame failed (-49) Bluetooth: hci0: command 0x1001 tx timeout Bluetooth: hci0: sending frame failed (-49) Bluetooth: hci0: command 0x1009 tx timeout Bluetooth: hci0: Frame reassembly failed (-84) BUG: unable to handle kernel paging request at ffffffffffffffd6 #PF error: [normal kernel read fault] PGD 9871067 P4D 9871067 PUD 9873067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 2495 Comm: kworker/u4:3 Not tainted 4.20.0+ #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound flush_to_ldisc RIP: 0010:h4_recv_buf+0x1ea/0xda0 drivers/bluetooth/hci_h4.c:211 Code: b6 14 10 48 89 c8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 d7 0a 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b 45 d0 4c 8d 60 70 <0f> b7 58 2a 4c 89 e0 48 c1 e8 03 0f b6 04 10 84 c0 74 08 3c 03 0f RSP: 0018:ffff8880a2c8f6c0 EFLAGS: 00010246 RAX: ffffffffffffffac RBX: 0000000000000000 RCX: ffffffffffffffd6 RDX: dffffc0000000000 RSI: ffffffff85893842 RDI: 0000000000000005 RBP: ffff8880a2c8f748 R08: ffff8880a2c7a080 R09: 0000000000000003 R10: ffffed1015cc5b8f R11: ffff8880ae62dc7b R12: 000000000000001c R13: ffff88809ab44300 R14: ffff888098a23220 R15: 0000000000000006 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000908f5000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: h4_recv+0xe4/0x200 drivers/bluetooth/hci_h4.c:131 hci_uart_tty_receive+0x22b/0x530 drivers/bluetooth/hci_ldisc.c:607 tty_ldisc_receive_buf+0x164/0x1c0 drivers/tty/tty_buffer.c:465 tty_port_default_receive_buf+0x114/0x190 drivers/tty/tty_port.c:38 receive_buf drivers/tty/tty_buffer.c:481 [inline] flush_to_ldisc+0x3b2/0x590 drivers/tty/tty_buffer.c:533 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: CR2: ffffffffffffffd6 ---[ end trace 1634737d46a55fd8 ]--- RIP: 0010:h4_recv_buf+0x1ea/0xda0 drivers/bluetooth/hci_h4.c:211 Code: b6 14 10 48 89 c8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 d7 0a 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b 45 d0 4c 8d 60 70 <0f> b7 58 2a 4c 89 e0 48 c1 e8 03 0f b6 04 10 84 c0 74 08 3c 03 0f RSP: 0018:ffff8880a2c8f6c0 EFLAGS: 00010246 RAX: ffffffffffffffac RBX: 0000000000000000 RCX: ffffffffffffffd6 RDX: dffffc0000000000 RSI: ffffffff85893842 RDI: 0000000000000005 RBP: ffff8880a2c8f748 R08: ffff8880a2c7a080 R09: 0000000000000003 R10: ffffed1015cc5b8f R11: ffff8880ae62dc7b R12: 000000000000001c R13: ffff88809ab44300 R14: ffff888098a23220 R15: 0000000000000006 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000908f5000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400