------------[ cut here ]------------
WARNING: CPU: 1 PID: 1519 at drivers/tty/tty_ioctl.c:320 tty_set_termios+0xdcb/0x15f0 drivers/tty/tty_ioctl.c:319
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 1519 Comm: kworker/u5:0 Not tainted 5.3.0-rc2+ #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_power_on
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x2f8 lib/dump_stack.c:113
 panic+0x29b/0x7d9 kernel/panic.c:219
 __warn+0x22f/0x230 kernel/panic.c:576
 report_bug+0x190/0x290 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0xd7/0x440 arch/x86/kernel/traps.c:272
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1026
RIP: 0010:tty_set_termios+0xdcb/0x15f0 drivers/tty/tty_ioctl.c:319
Code: 0f 85 3b 08 00 00 31 c0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 73 6b be fd 48 c7 c7 3d b9 7a 88 31 c0 e8 a8 ca a6 fd <0f> 0b e9 38 f3 ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c d9 f2 ff ff
RSP: 0018:ffff8880a625f7a0 EFLAGS: 00010246
RAX: 0000000000000024 RBX: 0000000000000001 RCX: 942dd6da568bd500
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff8880a625f8b0 R08: ffffffff816068b4 R09: ffffed1015d66088
R10: ffffed1015d66088 R11: 0000000000000000 R12: ffff8880a625f950
R13: ffff8880a7daf700 R14: dffffc0000000000 R15: ffff8882192d803a
 hci_uart_set_baudrate drivers/bluetooth/hci_ldisc.c:371 [inline]
 hci_uart_setup+0x19d/0x5c0 drivers/bluetooth/hci_ldisc.c:394
 hci_dev_do_open+0x4bc/0x1670 net/bluetooth/hci_core.c:1450
 hci_power_on+0x155/0x590 net/bluetooth/hci_core.c:2171
 process_one_work+0x83b/0x1150 kernel/workqueue.c:2269
 worker_thread+0xc01/0x1630 kernel/workqueue.c:2415
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..