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BUG: KASAN: global-out-of-bounds in memcpy include/linux/string.h:406 [inline]
BUG: KASAN: global-out-of-bounds in fbcon_get_font+0x2f4/0x6f0 drivers/video/fbdev/core/fbcon.c:2475
Read of size 32 at addr ffffffff88969840 by task syz-executor.4/24777

CPU: 0 PID: 24777 Comm: syz-executor.4 Not tainted 5.8.0-rc4-next-20200710-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0x5/0x497 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
 check_memory_region_inline mm/kasan/generic.c:186 [inline]
 check_memory_region+0x13d/0x180 mm/kasan/generic.c:192
 memcpy+0x20/0x60 mm/kasan/common.c:105
 memcpy include/linux/string.h:406 [inline]
 fbcon_get_font+0x2f4/0x6f0 drivers/video/fbdev/core/fbcon.c:2475
 con_font_get drivers/tty/vt/vt.c:4563 [inline]
 con_font_op+0x1f5/0x1110 drivers/tty/vt/vt.c:4722
 do_fontx_ioctl drivers/tty/vt/vt_ioctl.c:514 [inline]
 vt_io_ioctl drivers/tty/vt/vt_ioctl.c:611 [inline]
 vt_ioctl+0x18fe/0x2c20 drivers/tty/vt/vt_ioctl.c:846
 tty_ioctl+0x1019/0x15f0 drivers/tty/tty_io.c:2656
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:753
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl fs/ioctl.c:760 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cba9
Code: Bad RIP value.
RSP: 002b:00007f0865482c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e6c40 RCX: 000000000045cba9
RDX: 0000000020000000 RSI: 0000000000004b6b RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000033d R14: 00000000004c5dbe R15: 00007f08654836d4

The buggy address belongs to the variable:
 fontdata_8x16+0x1000/0x1120

Memory state around the buggy address:
 ffffffff88969700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff88969780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffff88969800: 00 00 00 00 00 00 00 00 f9 f9 f9 f9 06 f9 f9 f9
                                           ^
 ffffffff88969880: f9 f9 f9 f9 05 f9 f9 f9 f9 f9 f9 f9 06 f9 f9 f9
 ffffffff88969900: f9 f9 f9 f9 00 00 03 f9 f9 f9 f9 f9 00 00 00 00
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