WARNING: CPU: 0 PID: 12724 at drivers/tty/tty_ioctl.c:319 tty_set_termios+0x7a5/0x8d0 drivers/tty/tty_ioctl.c:319 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 12724 Comm: kworker/u5:2 Not tainted 4.19.56 #28 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci1 hci_power_on Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x263/0x507 kernel/panic.c:185 __warn.cold+0x20/0x4a kernel/panic.c:540 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1013 RIP: 0010:tty_set_termios+0x7a5/0x8d0 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 49 fe ff ff e8 9b 36 05 fe <0f> 0b e9 3e f9 ff ff e8 af 9b 3b fe e9 d6 fa ff ff e8 a5 9b 3b fe RSP: 0018:ffff88805596f990 EFLAGS: 00010293 RAX: ffff888091f26180 RBX: ffff88805596fa50 RCX: ffffffff8365d94d RDX: 0000000000000000 RSI: ffffffff8365e015 RDI: 0000000000000005 RBP: ffff88805596fa78 R08: ffff888091f26180 R09: fffffbfff15dcbc9 R10: fffffbfff15dcbc8 R11: 0000000000000003 R12: ffff88805596fab8 R13: 0000000000010004 R14: 1ffff1100ab2df51 R15: ffff888099e12140 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+0x674/0x14a0 net/bluetooth/hci_core.c:1423 hci_power_on+0x10d/0x580 net/bluetooth/hci_core.c:2130 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Kernel Offset: disabled Rebooting in 86400 seconds..