process_one_work+0x965/0x1690 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 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: 1 PID: 2715 Comm: kworker/1:5 Not tainted 5.7.0-rc7-next-20200529-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:ffffc90008de7640 EFLAGS: 00010003
RAX: dffffc0000000000 RBX: ffff888218850800 RCX: ffffffff83c2090e
RDX: 0000000020000001 RSI: ffffffff83c1ff49 RDI: ffff8880920313f0
RBP: ffff888092031000 R08: ffff88809ed52100 R09: fffffbfff155b449
R10: ffffffff8aada247 R11: fffffbfff155b448 R12: ffff8880a45af000
R13: 0000000000000001 R14: ffff8880a45af4a0 R15: 000000010000000e
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e72f000 CR3: 000000009aca0000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 fbcon_blank+0x87e/0xc10 drivers/video/fbdev/core/fbcon.c:2415
 do_unblank_screen drivers/tty/vt/vt.c:4310 [inline]
 do_unblank_screen+0x248/0x430 drivers/tty/vt/vt.c:4278
 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:138 [inline]
 do_trap+0x10a/0x250 arch/x86/kernel/traps.c:176
 do_error_trap+0xe2/0x2b0 arch/x86/kernel/traps.c:203
 __exc_divide_error arch/x86/kernel/traps.c:225 [inline]
 exc_divide_error+0x34/0x50 arch/x86/kernel/traps.c:223
 asm_exc_divide_error+0x12/0x20 arch/x86/include/asm/idtentry.h:523
RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:378 [inline]
RIP: 0010:fbcon_switch+0x1fc/0x16f0 drivers/video/fbdev/core/fbcon.c:2256
Code: 2d a9 d9 7c 09 48 89 2d 22 d9 7c 09 38 ca 7c 08 84 c9 0f 85 83 12 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 38 a5 b0 fd 41 83 fe 05 0f 8e 4a 0b 00 00
RSP: 0018:ffffc90008de79f0 EFLAGS: 00010246
RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83c2578b RDI: 0000000000000005
RBP: ffff8880a3750000 R08: ffff88809ed52100 R09: fffffbfff155b449
R10: ffffffff8aada247 R11: fffffbfff155b448 R12: ffff888092031000
R13: ffff8880a45af000 R14: 0000000000008000 R15: ffffffff8898bba0
 redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015
 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:2850
 process_one_work+0x965/0x1690 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Modules linked in:
---[ end trace 9d21bcbeea91fcbd ]---
RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:378 [inline]
RIP: 0010:fbcon_switch+0x1fc/0x16f0 drivers/video/fbdev/core/fbcon.c:2256
Code: 2d a9 d9 7c 09 48 89 2d 22 d9 7c 09 38 ca 7c 08 84 c9 0f 85 83 12 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 38 a5 b0 fd 41 83 fe 05 0f 8e 4a 0b 00 00
RSP: 0018:ffffc90008de79f0 EFLAGS: 00010246
RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83c2578b RDI: 0000000000000005
RBP: ffff8880a3750000 R08: ffff88809ed52100 R09: fffffbfff155b449
R10: ffffffff8aada247 R11: fffffbfff155b448 R12: ffff888092031000
R13: ffff8880a45af000 R14: 0000000000008000 R15: ffffffff8898bba0
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e72f000 CR3: 000000009aca0000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600