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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:2303
Read of size 31 at addr ffffffff8896ac7c by task syz-executor.3/8236

CPU: 0 PID: 8236 Comm: syz-executor.3 Not tainted 5.9.0-rc6-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+0x198/0x1fd 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:2303
 con_font_get drivers/tty/vt/vt.c:4571 [inline]
 con_font_op+0x1f5/0x1110 drivers/tty/vt/vt.c:4730
 do_fontx_ioctl drivers/tty/vt/vt_ioctl.c:514 [inline]
 vt_io_ioctl drivers/tty/vt/vt_ioctl.c:611 [inline]
 vt_ioctl+0x1b6d/0x2cc0 drivers/tty/vt/vt_ioctl.c:856
 tty_ioctl+0x1019/0x15f0 drivers/tty/tty_io.c:2656
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c8a9
Code: 8d b6 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8e78c94c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e5860 RCX: 000000000045c8a9
RDX: 0000000020000000 RSI: 0000000000004b6b RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000330 R14: 00000000004c59d5 R15: 00007f8e78c956d4

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

Memory state around the buggy address:
 ffffffff8896ab80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff8896ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffff8896ac80: f9 f9 f9 f9 06 f9 f9 f9 f9 f9 f9 f9 05 f9 f9 f9
                   ^
 ffffffff8896ad00: f9 f9 f9 f9 06 f9 f9 f9 f9 f9 f9 f9 00 00 03 f9
 ffffffff8896ad80: f9 f9 f9 f9 00 00 00 00 00 00 00 00 00 00 00 00
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