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BUG: KASAN: global-out-of-bounds in memcpy include/linux/string.h:380 [inline]
BUG: KASAN: global-out-of-bounds in soft_cursor+0x439/0xa30 drivers/video/fbdev/core/softcursor.c:70
Read of size 25 at addr ffffffff887402ab by task syz-executor.3/10014

CPU: 3 PID: 10014 Comm: syz-executor.3 Not tainted 5.5.0-rc6-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374
 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:639
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192
 memcpy+0x24/0x50 mm/kasan/common.c:125
 memcpy include/linux/string.h:380 [inline]
 soft_cursor+0x439/0xa30 drivers/video/fbdev/core/softcursor.c:70
 bit_cursor+0x12fc/0x1a60 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x487/0x660 drivers/video/fbdev/core/fbcon.c:1402
 hide_cursor+0x9d/0x2b0 drivers/tty/vt/vt.c:895
 redraw_screen+0x60b/0x7d0 drivers/tty/vt/vt.c:988
 fbcon_do_set_font+0x829/0x960 drivers/video/fbdev/core/fbcon.c:2605
 fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2620
 con_font_copy drivers/tty/vt/vt.c:4594 [inline]
 con_font_op+0x6b2/0x1270 drivers/tty/vt/vt.c:4609
 vt_ioctl+0x181a/0x26d0 drivers/tty/vt/vt_ioctl.c:965
 tty_ioctl+0xa37/0x14f0 drivers/tty/tty_io.c:2660
 vfs_ioctl fs/ioctl.c:47 [inline]
 file_ioctl fs/ioctl.c:545 [inline]
 do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:749
 __do_sys_ioctl fs/ioctl.c:756 [inline]
 __se_sys_ioctl fs/ioctl.c:754 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45afd9
Code: bd b1 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 8b b1 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4ce6e25c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000072bf00 RCX: 000000000045afd9
RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4ce6e266d4
R13: 00000000004ab1d8 R14: 00000000006eee98 R15: 00000000ffffffff

The buggy address belongs to the variable:
 oid_index+0x16b/0xb80

Memory state around the buggy address:
 ffffffff88740180: 00 00 00 00 00 00 00 00 00 00 06 fa fa fa fa fa
 ffffffff88740200: 00 02 fa fa fa fa fa fa 00 01 fa fa fa fa fa fa
>ffffffff88740280: 00 04 fa fa fa fa fa fa 00 00 02 fa fa fa fa fa
                                  ^
 ffffffff88740300: 00 03 fa fa fa fa fa fa 07 fa fa fa fa fa fa fa
 ffffffff88740380: 00 01 fa fa fa fa fa fa 00 05 fa fa fa fa fa fa
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