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BUG: KASAN: global-out-of-bounds in memcpy include/linux/string.h:372 [inline]
BUG: KASAN: global-out-of-bounds in soft_cursor+0x442/0xa50 drivers/video/fbdev/core/softcursor.c:70
Read of size 32 at addr ffffffff87cf4870 by task kworker/1:145/28534

CPU: 1 PID: 28534 Comm: kworker/1:145 Not tainted 4.14.213-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient fb_flashcursor
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x5/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
 kasan_report+0x6f/0x7b mm/kasan/report.c:409
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:372 [inline]
 soft_cursor+0x442/0xa50 drivers/video/fbdev/core/softcursor.c:70
 bit_cursor+0xf7a/0x1580 drivers/video/fbdev/core/bitblit.c:377
 fb_flashcursor+0x356/0x3f0 drivers/video/fbdev/core/fbcon.c:373
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

The buggy address belongs to the variable:
 oid_index+0x1f0/0x9a0

Memory state around the buggy address:
 ffffffff87cf4700: fa fa fa fa 00 02 fa fa fa fa fa fa 00 01 fa fa
 ffffffff87cf4780: fa fa fa fa 00 00 02 fa fa fa fa fa 00 03 fa fa
>ffffffff87cf4800: fa fa fa fa 06 fa fa fa fa fa fa fa 05 fa fa fa
                                                             ^
 ffffffff87cf4880: fa fa fa fa 07 fa fa fa fa fa fa fa 00 01 fa fa
 ffffffff87cf4900: fa fa fa fa 00 05 fa fa fa fa fa fa 03 fa fa fa
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