R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 WARNING: CPU: 0 PID: 28373 at drivers/tty/tty_ldisc.c:531 tty_ldisc_restore drivers/tty/tty_ldisc.c:531 [inline] WARNING: CPU: 0 PID: 28373 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: 28373 Comm: syz-executor0 Not tainted 4.15.0-rc9+ #193 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+0x194/0x257 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+0x22/0x40 arch/x86/entry/entry_64.S:1096 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:ffff8801bd147970 EFLAGS: 00010246 RAX: 0000000000010000 RBX: ffff8801cfbb2cc0 RCX: ffffffff82907a16 RDX: 0000000000010000 RSI: ffffc900017a7000 RDI: 0000000000000282 RBP: ffff8801bd1479c0 R08: 1ffff10037a28eee R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff R13: ffff8801cfbb3230 R14: ffff8801d03044c0 R15: fffffffffffffff4 tiocsetd drivers/tty/tty_io.c:2319 [inline] tty_ioctl+0x492/0x1610 drivers/tty/tty_io.c:2563 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 C_SYSC_ioctl fs/compat_ioctl.c:1495 [inline] compat_SyS_ioctl+0x4ef/0x2a30 fs/compat_ioctl.c:1419 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline] do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389 entry_SYSENTER_compat+0x54/0x63 arch/x86/entry/entry_64_compat.S:129 RIP: 0023:0xf7f8cc79 RSP: 002b:00000000f778808c EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000015 RCX: 0000000000005423 RDX: 0000000020fe6000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..