WARNING: CPU: 0 PID: 1287 at drivers/tty/tty_ioctl.c:319 tty_set_termios+0x7a9/0x8d0 drivers/tty/tty_ioctl.c:319 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 1287 Comm: kworker/u5:0 Not tainted 5.1.0-rc5-next-20190418 #28 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+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x72b kernel/panic.c:214 __warn.cold+0x20/0x46 kernel/panic.c:576 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:972 RIP: 0010:tty_set_termios+0x7a9/0x8d0 drivers/tty/tty_ioctl.c:319 Code: 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a3 00 00 00 45 89 a7 d0 03 00 00 e9 47 fe ff ff e8 e7 1b fa fd <0f> 0b e9 3a f9 ff ff e8 bb f5 32 fe e9 d2 fa ff ff e8 b1 f5 32 fe RSP: 0018:ffff8880a698f968 EFLAGS: 00010293 RAX: ffff8880a6944300 RBX: ffff8880a698fa28 RCX: ffffffff8376a3dd RDX: 0000000000000000 RSI: ffffffff8376aaa9 RDI: 0000000000000005 RBP: ffff8880a698fa50 R08: ffff8880a6944300 R09: fffffbfff162dd1d R10: fffffbfff162dd1c R11: 0000000000000003 R12: ffff8880a698fa90 R13: 0000000000010004 R14: 1ffff11014d31f4c R15: ffff88808ceea100 hci_uart_set_baudrate+0x157/0x1c0 drivers/bluetooth/hci_ldisc.c:378 hci_uart_setup+0xa2/0x490 drivers/bluetooth/hci_ldisc.c:401 hci_dev_do_open+0x78c/0x1780 net/bluetooth/hci_core.c:1450 hci_power_on+0x10d/0x580 net/bluetooth/hci_core.c:2173 process_one_work+0x98e/0x1790 kernel/workqueue.c:2268 worker_thread+0x98/0xe40 kernel/workqueue.c:2414 kthread+0x357/0x430 kernel/kthread.c:254 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds..