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:
general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#2] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f]
CPU: 0 PID: 960 Comm: kworker/0:4 Not tainted 5.8.0-rc5-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:ffffc9001ef075f8 EFLAGS: 00010003
RAX: dffffc0000000000 RBX: 000000010000000e RCX: ffffffff83c08157
RDX: 0000000020000001 RSI: ffffffff83c04e39 RDI: ffff88804a02c3f0
RBP: ffff88804a02c000 R08: 0000000000000000 R09: ffffffff8aaecc47
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a3674000
R13: 0000000000000001 R14: ffff8880a3672800 R15: ffff8880a36744a0
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004f4ed0 CR3: 00000001eb337000 CR4: 00000000001426f0
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:4310
 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:520
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 c7 80 7f 09 48 89 2d 40 80 7f 09 38 ca 7c 08 84 c9 0f 85 7d 13 00 00 41 8b 9c 24 8c 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 <f7> f3 41 89 c6 89 c6 e8 46 f7 b2 fd 41 83 fe 05 0f 8e c3 09 00 00
RSP: 0018:ffffc9001ef079a0 EFLAGS: 00010246
RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83c0c14d RDI: 0000000000000005
RBP: ffff8880a3710000 R08: 0000000000000000 R09: ffffffff8aaecc47
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804a02c000
R13: ffff8880a3674000 R14: 0000000000008000 R15: ffffffff8898f520
 redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015
 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 ea6f805ed8078ec1 ]---
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 c7 80 7f 09 48 89 2d 40 80 7f 09 38 ca 7c 08 84 c9 0f 85 7d 13 00 00 41 8b 9c 24 8c 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 <f7> f3 41 89 c6 89 c6 e8 46 f7 b2 fd 41 83 fe 05 0f 8e c3 09 00 00
RSP: 0018:ffffc9001ef079a0 EFLAGS: 00010246
RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83c0c14d RDI: 0000000000000005
RBP: ffff8880a3710000 R08: 0000000000000000 R09: ffffffff8aaecc47
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804a02c000
R13: ffff8880a3674000 R14: 0000000000008000 R15: ffffffff8898f520
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004f4ed0 CR3: 00000001eb337000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400