RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016
R13: 00000000000002fa R14: 00000000006f7810 R15: 0000000000000002
------------[ cut here ]------------
kernel BUG at drivers/tty/tty_ldisc.c:684!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 15868 Comm: syz-executor1 Not tainted 4.16.0+ #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tty_ldisc_reinit+0x26f/0x2e0 drivers/tty/tty_ldisc.c:684
RSP: 0018:ffff88018cb97650 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8801b1fac380 RCX: ffffc900082f2000
RDX: 0000000000040000 RSI: ffffffff837ae02f RDI: 0000000000000005
RBP: ffff88018cb97678 R08: ffff8801ae2463c0 R09: 0000000000000006
R10: ffff8801ae2463c0 R11: 0000000000000000 R12: fffffffffffffff4
R13: 0000000000000000 R14: ffff8801b1fac7e0 R15: dffffc0000000000
FS:  00007f1f16752700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c000 CR3: 00000001abd9a000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 tty_reopen+0x1e4/0x250 drivers/tty/tty_io.c:1272
 tty_open_by_driver drivers/tty/tty_io.c:1953 [inline]
 tty_open+0x7f5/0xb10 drivers/tty/tty_io.c:2007
 chrdev_open+0x256/0x760 fs/char_dev.c:417
 do_dentry_open+0x7ef/0xf10 fs/open.c:784
 vfs_open+0x139/0x230 fs/open.c:906
 dentry_open+0xad/0xf0 fs/open.c:925
 ptm_open_peer+0x255/0x320 drivers/tty/pty.c:639
 tty_ioctl+0x254/0x1830 drivers/tty/tty_io.c:2639
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1cf/0x1650 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 SYSC_ioctl fs/ioctl.c:708 [inline]
 SyS_ioctl+0x24/0x30 fs/ioctl.c:706
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455259
RSP: 002b:00007f1f16751c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1f167526d4 RCX: 0000000000455259
RDX: 0000000020000000 RSI: 0000000000005441 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016
R13: 00000000000002fa R14: 00000000006f7810 R15: 0000000000000002
Code: 83 b0 00 00 00 00 00 00 00 e9 f4 fd ff ff e8 39 2d fc fd 31 ff 44 89 ee e8 3f 2e fc fd 45 85 ed 0f 85 d7 fd ff ff e8 21 2d fc fd <0f> 0b 4c 89 f7 e8 a7 d6 37 fe e9 31 fe ff ff e8 dd d6 37 fe e9 
RIP: tty_ldisc_reinit+0x26f/0x2e0 drivers/tty/tty_ldisc.c:684 RSP: ffff88018cb97650
---[ end trace 6b2d03d3bb4d3ea7 ]---