RAX: ffffffffffffffda RBX: 00007efc93b396d4 RCX: 0000000000455979 RDX: 0000000020000040 RSI: 0000000000005423 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014 R13: 0000000000000360 R14: 00000000006f91a0 R15: 0000000000000001 WARNING: CPU: 1 PID: 7581 at drivers/tty/tty_ldisc.c:531 tty_ldisc_restore drivers/tty/tty_ldisc.c:531 [inline] WARNING: CPU: 1 PID: 7581 at drivers/tty/tty_ldisc.c:531 tty_set_ldisc+0x199d/0x21c0 drivers/tty/tty_ldisc.c:599 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7581 Comm: syz-executor2 Not tainted 4.16.0+ #87 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 panic+0x39d/0x940 kernel/panic.c:183 __warn+0x40f/0x580 kernel/panic.c:547 report_bug+0x72a/0x880 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] do_error_trap+0x1aa/0x600 arch/x86/kernel/traps.c:297 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:316 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:tty_ldisc_restore drivers/tty/tty_ldisc.c:531 [inline] RIP: 0010:tty_set_ldisc+0x199d/0x21c0 drivers/tty/tty_ldisc.c:599 RSP: 0018:ffff88014f43fab0 EFLAGS: 00010283 RAX: ffffffff845abcdd RBX: ffff88014ebc4418 RCX: 0000000000040000 RDX: ffffc900037a8000 RSI: 0000000000013e18 RDI: 0000000000013e19 RBP: ffff88014f43fbb0 R08: 0000000001080020 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88014e500700 R14: ffff88015091d858 R15: 00000000d3c00097 tiocsetd drivers/tty/tty_io.c:2336 [inline] tty_ioctl+0x2015/0x2ba0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0xaf0/0x2440 fs/ioctl.c:686 SYSC_ioctl+0x1d2/0x260 fs/ioctl.c:701 SyS_ioctl+0x54/0x80 fs/ioctl.c:692 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 RIP: 0033:0x455979 RSP: 002b:00007efc93b38c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007efc93b396d4 RCX: 0000000000455979 RDX: 0000000020000040 RSI: 0000000000005423 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014 R13: 0000000000000360 R14: 00000000006f91a0 R15: 0000000000000001 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..