RAX: ffffffffffffffda RBX: 00007ffa902ab6d4 RCX: 0000000000453e69 RDX: 0000000020c9f000 RSI: 0000000000005423 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015 R13: 0000000000000314 R14: 00000000006f4a80 R15: 0000000000000001 WARNING: CPU: 0 PID: 19856 at drivers/tty/tty_ldisc.c:531 tty_ldisc_restore drivers/tty/tty_ldisc.c:531 [inline] WARNING: CPU: 0 PID: 19856 at drivers/tty/tty_ldisc.c:531 tty_set_ldisc+0x4c6/0x7a0 drivers/tty/tty_ldisc.c:599 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 19856 Comm: syz-executor2 Not tainted 4.16.0-rc4+ #342 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+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x211/0x2d0 lib/bug.c:184 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 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+0x4c6/0x7a0 drivers/tty/tty_ldisc.c:599 RSP: 0018:ffff8801d80a79f0 EFLAGS: 00010246 RAX: 0000000000010000 RBX: ffff8801d7faa300 RCX: ffffffff8293e876 RDX: 0000000000010000 RSI: ffffc90002b25000 RDI: 0000000000000286 RBP: ffff8801d80a7a40 R08: 1ffff1003b014efe R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff R13: ffff8801d7faa870 R14: ffff8801d6f85940 R15: fffffffffffffff4 tiocsetd drivers/tty/tty_io.c:2327 [inline] tty_ioctl+0x492/0x1610 drivers/tty/tty_io.c:2571 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453e69 RSP: 002b:00007ffa902aac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffa902ab6d4 RCX: 0000000000453e69 RDX: 0000000020c9f000 RSI: 0000000000005423 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015 R13: 0000000000000314 R14: 00000000006f4a80 R15: 0000000000000001 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..