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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 ffffffff8a7bbe0a by task syz-executor.3/22093

CPU: 0 PID: 22093 Comm: syz-executor.3 Not tainted 5.9.0-rc8-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
 __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+0x35a/0x450 drivers/video/fbdev/core/fbcon.c:1308
 do_update_region+0x2d0/0x630 drivers/tty/vt/vt.c:665
 update_region+0xb5/0x140 drivers/tty/vt/vt.c:693
 vcs_write+0x403/0xc60 drivers/tty/vt/vc_screen.c:623
 vfs_write+0x2b0/0x730 fs/read_write.c:584
 ksys_write+0x12d/0x250 fs/read_write.c:639
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45de59
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f99b400ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000003a2c0 RCX: 000000000045de59
RDX: 0000000000000110 RSI: 0000000020003d00 RDI: 0000000000000005
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffceb794faf R14: 00007f99b400b9c0 R15: 000000000118bf2c

The buggy address belongs to the variable:
 fontdata_8x16+0x120a/0x1aa0

Memory state around the buggy address:
 ffffffff8a7bbd00: 00 00 00 00 00 00 00 00 f9 f9 f9 f9 00 00 00 00
 ffffffff8a7bbd80: f9 f9 f9 f9 00 00 00 00 f9 f9 f9 f9 00 00 00 00
>ffffffff8a7bbe00: f9 f9 f9 f9 00 00 00 02 f9 f9 f9 f9 00 00 00 f9
                      ^
 ffffffff8a7bbe80: f9 f9 f9 f9 00 00 00 00 f9 f9 f9 f9 00 00 00 00
 ffffffff8a7bbf00: f9 f9 f9 f9 00 02 f9 f9 f9 f9 f9 f9 00 00 00 00
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