kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 2859 Comm: kworker/0:2 Not tainted 4.14.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events console_callback
task: ffff88809ea98100 task.stack: ffff88809e960000
RIP: 0010:fbcon_cursor+0x10e/0x690 drivers/video/fbdev/core/fbcon.c:1328
RSP: 0018:ffff88809e967ba8 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: ffff8880a59b47c0 RCX: 1ffffffff15f0d70
RDX: 000000001ffffff5 RSI: 0000000000000001 RDI: ffff88804bad0c60
RBP: ffff88804bad08c0 R08: 000000000000ffff R09: ffffed104325c4ec
R10: ffffed104325c4eb R11: ffff8882192e275f R12: ffff888219346e00
R13: 0000000000000001 R14: 00000000ffffffac R15: ffff888219347270
FS:  0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb6685b87e CR3: 0000000052dc8000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 set_cursor drivers/tty/vt/vt.c:603 [inline]
 set_cursor+0x192/0x1e0 drivers/tty/vt/vt.c:594
 redraw_screen+0x56e/0x770 drivers/tty/vt/vt.c:707
 complete_change_console+0xf9/0x350 drivers/tty/vt/vt_ioctl.c:1284
 change_console+0x156/0x270 drivers/tty/vt/vt_ioctl.c:1409
 console_callback+0x32c/0x380 drivers/tty/vt/vt.c:2473
 process_one_work+0x813/0x1540 kernel/workqueue.c:2116
 worker_thread+0x5d1/0x1070 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 43 05 00 00 4c 8b b5 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 
RIP: fbcon_cursor+0x10e/0x690 drivers/video/fbdev/core/fbcon.c:1328 RSP: ffff88809e967ba8
---[ end trace 89f23a886162542e ]---