general protection fault, probably for non-canonical address 0xdffffc001fffffea: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x00000000ffffff50-0x00000000ffffff57]
CPU: 1 PID: 3197 Comm: kworker/1:42 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events console_callback
RIP: 0010:fbcon_cursor+0x10e/0x650 drivers/video/fbdev/core/fbcon.c:1389
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e2 04 00 00 4c 8b bd f0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <0f> b6 14 02 4c 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 b1
RSP: 0018:ffffc90001637b18 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880a30a4800 RCX: ffffffff83e9e52d
RDX: 000000001fffffea RSI: ffffffff83be2599 RDI: ffff88809c3da3f0
RBP: ffff88809c3da000 R08: ffff88809e68a180 R09: ffffed10146052dc
R10: ffff8880a30296df R11: ffffed10146052db R12: ffff8880a36e5000
R13: 0000000000000001 R14: ffff8880a36e54a0 R15: 00000000ffffff50
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff9be39f88 CR3: 0000000067268000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 set_cursor drivers/tty/vt/vt.c:909 [inline]
 set_cursor+0x1e6/0x230 drivers/tty/vt/vt.c:900
 redraw_screen+0x4b7/0x770 drivers/tty/vt/vt.c:1025
 complete_change_console+0x104/0x3a0 drivers/tty/vt/vt_ioctl.c:1274
 change_console+0x197/0x2c0 drivers/tty/vt/vt_ioctl.c:1399
 console_callback+0x3b1/0x410 drivers/tty/vt/vt.c:2844
 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 31d1fc71a592fb65 ]---
RIP: 0010:fbcon_cursor+0x10e/0x650 drivers/video/fbdev/core/fbcon.c:1389
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e2 04 00 00 4c 8b bd f0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <0f> b6 14 02 4c 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 b1
RSP: 0018:ffffc90001637b18 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880a30a4800 RCX: ffffffff83e9e52d
RDX: 000000001fffffea RSI: ffffffff83be2599 RDI: ffff88809c3da3f0
RBP: ffff88809c3da000 R08: ffff88809e68a180 R09: ffffed10146052dc
R10: ffff8880a30296df R11: ffffed10146052db R12: ffff8880a36e5000
R13: 0000000000000001 R14: ffff8880a36e54a0 R15: 00000000ffffff50
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff9be39f88 CR3: 0000000061a60000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400