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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 fb_pad_aligned_buffer+0x122/0x150 drivers/video/fbdev/core/fbmem.c:116
Read of size 1 at addr ffffffff8896d0e0 by task syz-executor737/8362

CPU: 3 PID: 8362 Comm: syz-executor737 Not tainted 5.9.0-rc2-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+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
 __fb_pad_aligned_buffer include/linux/fb.h:654 [inline]
 fb_pad_aligned_buffer+0x122/0x150 drivers/video/fbdev/core/fbmem.c:116
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:99 [inline]
 bit_putcs+0x9eb/0xd20 drivers/video/fbdev/core/bitblit.c:185
 fbcon_putcs+0x33c/0x3f0 drivers/video/fbdev/core/fbcon.c:1362
 do_update_region+0x399/0x630 drivers/tty/vt/vt.c:675
 redraw_screen+0x64e/0x770 drivers/tty/vt/vt.c:1034
 fbcon_do_set_font+0x7ec/0x950 drivers/video/fbdev/core/fbcon.c:2636
 fbcon_copy_font+0x125/0x190 drivers/video/fbdev/core/fbcon.c:2651
 con_font_copy drivers/tty/vt/vt.c:4719 [inline]
 con_font_op+0x65a/0x1110 drivers/tty/vt/vt.c:4734
 compat_kdfontop_ioctl drivers/tty/vt/vt_ioctl.c:1166 [inline]
 vt_compat_ioctl+0x3fd/0x6b0 drivers/tty/vt/vt_ioctl.c:1228
 tty_compat_ioctl+0x19c/0x410 drivers/tty/tty_io.c:2847
 __do_compat_sys_ioctl+0x1d3/0x230 fs/ioctl.c:842
 do_syscall_32_irqs_on arch/x86/entry/common.c:84 [inline]
 __do_fast_syscall_32+0x57/0x80 arch/x86/entry/common.c:126
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f60549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f7f3a1dc EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000004b72
RDX: 0000000020000080 RSI: 0000000000000000 RDI: 00000000080fd01c
RBP: 0000000000000068 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

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

Memory state around the buggy address:
 ffffffff8896cf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff8896d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffff8896d080: 00 00 00 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9
                                                       ^
 ffffffff8896d100: 06 f9 f9 f9 f9 f9 f9 f9 05 f9 f9 f9 f9 f9 f9 f9
 ffffffff8896d180: 06 f9 f9 f9 f9 f9 f9 f9 00 00 03 f9 f9 f9 f9 f9
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