worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#2] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f]
CPU: 1 PID: 2774 Comm: kworker/1:2 Not tainted 5.8.0-rc3-next-20200703-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/0x660 drivers/video/fbdev/core/fbcon.c:1389
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f8 04 00 00 48 8b 9d 08 04 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 4b
RSP: 0018:ffffc90008b975f8 EFLAGS: 00010003
RAX: dffffc0000000000 RBX: 000000010000000e RCX: ffffffff83c24487
RDX: 0000000020000001 RSI: ffffffff83c21159 RDI: ffff8880918ee408
RBP: ffff8880918ee000 R08: 0000000000000000 R09: ffffffff8aaf0347
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a375d000
R13: 0000000000000001 R14: ffff888218873400 R15: ffff8880a375d4a0
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f2b8587ec8 CR3: 000000008cded000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fbcon_blank+0x865/0xbf0 drivers/video/fbdev/core/fbcon.c:2416
 do_unblank_screen+0x248/0x430 drivers/tty/vt/vt.c:4394
 bust_spinlocks+0x5b/0xe0 lib/bust_spinlocks.c:26
 oops_end+0x2b/0xf0 arch/x86/kernel/dumpstack.c:337
 do_trap_no_signal arch/x86/kernel/traps.c:119 [inline]
 do_trap+0x1d8/0x270 arch/x86/kernel/traps.c:157
 do_error_trap+0xba/0x1e0 arch/x86/kernel/traps.c:177
 __exc_divide_error arch/x86/kernel/traps.c:199 [inline]
 exc_divide_error+0x34/0x50 arch/x86/kernel/traps.c:197
 asm_exc_divide_error+0x12/0x20 arch/x86/include/asm/idtentry.h:543
RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:378 [inline]
RIP: 0010:fbcon_switch+0x1fe/0x16c0 drivers/video/fbdev/core/fbcon.c:2256
Code: 2d 37 8c 7e 09 48 89 2d b0 8b 7e 09 38 ca 7c 08 84 c9 0f 85 7e 13 00 00 41 8b 9c 24 b4 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 <f7> f3 41 89 c6 89 c6 e8 86 63 b1 fd 41 83 fe 05 0f 8e c4 09 00 00
RSP: 0018:ffffc90008b979a0 EFLAGS: 00010246
RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83c29f7d RDI: 0000000000000005
RBP: ffff8880a3010000 R08: 0000000000000000 R09: ffffffff8aaf0347
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880918ee000
R13: ffff8880a375d000 R14: 0000000000008000 R15: ffffffff88992560
 redraw_screen+0x2af/0x770 drivers/tty/vt/vt.c:1020
 complete_change_console+0xff/0x610 drivers/tty/vt/vt_ioctl.c:1279
 change_console+0x19c/0x560 drivers/tty/vt/vt_ioctl.c:1404
 console_callback+0x3b1/0x410 drivers/tty/vt/vt.c:2934
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
---[ end trace de942eed5827ee12 ]---
RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:378 [inline]
RIP: 0010:fbcon_switch+0x1fe/0x16c0 drivers/video/fbdev/core/fbcon.c:2256
Code: 2d 37 8c 7e 09 48 89 2d b0 8b 7e 09 38 ca 7c 08 84 c9 0f 85 7e 13 00 00 41 8b 9c 24 b4 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 <f7> f3 41 89 c6 89 c6 e8 86 63 b1 fd 41 83 fe 05 0f 8e c4 09 00 00
RSP: 0018:ffffc90008b979a0 EFLAGS: 00010246
RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83c29f7d RDI: 0000000000000005
RBP: ffff8880a3010000 R08: 0000000000000000 R09: ffffffff8aaf0347
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880918ee000
R13: ffff8880a375d000 R14: 0000000000008000 R15: ffffffff88992560
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f2b8587ec8 CR3: 000000008cded000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400