kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 59 Comm: kworker/u4:2 Not tainted 4.14.0-rc5+ #142
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
task: ffff8801d9aa6700 task.stack: ffff8801d9ab0000
RIP: 0010:__read_once_size include/linux/compiler.h:276 [inline]
RIP: 0010:n_tty_receive_buf_common+0x154/0x2520 drivers/tty/n_tty.c:1690
RSP: 0018:ffff8801d9ab7130 EFLAGS: 00010202
RAX: 000000000000044c RBX: ffff8801d4cb0400 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8801d4cb07a8 RDI: 0000000000002260
RBP: ffff8801d9ab72d8 R08: ffffffff82721563 R09: 0000000000000005
R10: ffff8801d9ab6f68 R11: 0000000000000002 R12: ffff8801d28ed27f
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d28ed27f
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f97bb6e6330 CR3: 00000001c5959000 CR4: 00000000001426e0
Call Trace:
 n_tty_receive_buf2+0x33/0x40 drivers/tty/n_tty.c:1746
 tty_ldisc_receive_buf+0xa7/0x180 drivers/tty/tty_buffer.c:455
 tty_port_default_receive_buf+0x106/0x160 drivers/tty/tty_port.c:37
 receive_buf drivers/tty/tty_buffer.c:474 [inline]
 flush_to_ldisc+0x3c4/0x590 drivers/tty/tty_buffer.c:523
 process_one_work+0xbf0/0x1bc0 kernel/workqueue.c:2119
 worker_thread+0x223/0x1860 kernel/workqueue.c:2253
 kthread+0x35e/0x430 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431
Code: 89 85 18 ff ff ff 48 8d 45 98 48 89 85 e0 fe ff ff e8 61 a8 fb fe 48 8b 85 18 ff ff ff c6 00 00 48 8b 85 a0 fe ff ff 48 c1 e8 03 <42> 80 3c 30 00 0f 85 6d 1e 00 00 48 8b 85 28 ff ff ff 4c 8b a8 
RIP: __read_once_size include/linux/compiler.h:276 [inline] RSP: ffff8801d9ab7130
RIP: n_tty_receive_buf_common+0x154/0x2520 drivers/tty/n_tty.c:1690 RSP: ffff8801d9ab7130
---[ end trace b62a8a78df2eb9d9 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..