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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 21 at addr ffffffff88964f3f by task syz-executor.3/28526

CPU: 1 PID: 28526 Comm: syz-executor.3 Not tainted 5.8.0-rc5-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+0x5/0x436 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:4479 [inline]
 con_font_op+0x1f5/0x1110 drivers/tty/vt/vt.c:4638
 vt_ioctl+0x16dc/0x2670 drivers/tty/vt/vt_ioctl.c:980
 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: 0033:0x45c1d9
Code: Bad RIP value.
RSP: 002b:00007f4ad97fbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000000e500 RCX: 000000000045c1d9
RDX: 0000000020000140 RSI: 0000000000004b72 RDI: 0000000000000009
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007fffaaa02d9f R14: 00007f4ad97fc9c0 R15: 000000000078bf0c

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

Memory state around the buggy address:
 ffffffff88964e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff88964e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffff88964f00: 00 00 00 00 00 00 00 00 fa fa fa fa 06 fa fa fa
                                           ^
 ffffffff88964f80: fa fa fa fa 05 fa fa fa fa fa fa fa 06 fa fa fa
 ffffffff88965000: fa fa fa fa 00 00 03 fa fa fa fa fa 00 00 00 00
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