general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f]
CPU: 1 PID: 10829 Comm: kworker/1:7 Not tainted 5.8.0-rc3-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 d5 04 00 00 48 8b 9d f0 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 2b
RSP: 0018:ffffc9000ce0fac8 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 000000010000000e RCX: ffffffff83ecdf24
RDX: 0000000020000001 RSI: ffffffff83c023b9 RDI: ffff8880a65593f0
RBP: ffff8880a6559000 R08: 0000000000000001 R09: ffff8880a3a182df
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a3a5f000
R13: 0000000000000001 R14: ffff888218e9e000 R15: ffff8880a3a5f4a0
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000073d138 CR3: 0000000094171000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 set_cursor drivers/tty/vt/vt.c:915 [inline]
 set_cursor+0x1dd/0x230 drivers/tty/vt/vt.c:906
 redraw_screen+0x4b7/0x770 drivers/tty/vt/vt.c:1031
 complete_change_console+0xff/0x610 drivers/tty/vt/vt_ioctl.c:1274
 change_console+0x19c/0x560 drivers/tty/vt/vt_ioctl.c:1399
 console_callback+0x3b1/0x410 drivers/tty/vt/vt.c:2850
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Modules linked in:
---[ end trace db42e9f9c290270b ]---
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 d5 04 00 00 48 8b 9d f0 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 2b
RSP: 0018:ffffc9000ce0fac8 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 000000010000000e RCX: ffffffff83ecdf24
RDX: 0000000020000001 RSI: ffffffff83c023b9 RDI: ffff8880a65593f0
RBP: ffff8880a6559000 R08: 0000000000000001 R09: ffff8880a3a182df
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a3a5f000
R13: 0000000000000001 R14: ffff888218e9e000 R15: ffff8880a3a5f4a0
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000073d138 CR3: 0000000094171000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400