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BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer include/linux/fb.h:654 [inline]
BUG: KASAN: global-out-of-bounds in bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
BUG: KASAN: global-out-of-bounds in bit_putcs+0xbb6/0xd20 drivers/video/fbdev/core/bitblit.c:185
Read of size 1 at addr ffffffff8a7bbd50 by task kworker/1:16/11623

CPU: 1 PID: 11623 Comm: kworker/1:16 Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events console_callback
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
 __fb_pad_aligned_buffer include/linux/fb.h:654 [inline]
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
 bit_putcs+0xbb6/0xd20 drivers/video/fbdev/core/bitblit.c:185
 fbcon_putcs+0x35a/0x450 drivers/video/fbdev/core/fbcon.c:1308
 do_update_region+0x399/0x630 drivers/tty/vt/vt.c:675
 redraw_screen+0x658/0x790 drivers/tty/vt/vt.c:1034
 complete_change_console+0x109/0x630 drivers/tty/vt/vt_ioctl.c:1289
 change_console+0x1a6/0x580 drivers/tty/vt/vt_ioctl.c:1414
 console_callback+0x19e/0x4c0 drivers/tty/vt/vt.c:2941
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

The buggy address belongs to the variable:
 fontdata_8x16+0x11d0/0x1aa0

Memory state around the buggy address:
 ffffffff8a7bbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff8a7bbc80: 00 00 00 00 00 00 00 00 f9 f9 f9 f9 00 00 00 00
>ffffffff8a7bbd00: f9 f9 f9 f9 00 00 00 00 f9 f9 f9 f9 00 00 00 00
                                                 ^
 ffffffff8a7bbd80: f9 f9 f9 f9 00 00 00 02 f9 f9 f9 f9 00 00 00 f9
 ffffffff8a7bbe00: f9 f9 f9 f9 00 00 00 00 f9 f9 f9 f9 00 00 00 00
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