[syzbot] [fbdev?] general protection fault in soft_cursor

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+d910bd780e6efac35869 at syzkaller.appspotmail.com

Tested on:

commit:         9ee79acc fbcon: Prevent softcursor if no font set
git tree:       https://github.com/hdeller/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=136dee6d280000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8860074b9a9d6c45
dashboard link: https://syzkaller.appspot.com/bug?extid=d910bd780e6efac35869
compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.