syzbot suspects this issue was fixed by commit:

commit bce1305c0ece3dc549663605e567655dd701752c
Author: Marc Zyngier [off-list ref]
Date:   Sat Aug 29 11:26:01 2020 +0000

    HID: core: Correctly handle ReportSize being zero

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12d19370500000
start commit:   1127b219 Merge tag 'fallthrough-fixes-5.9-rc3' of git://gi..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=891ca5711a9f1650
dashboard link: https://syzkaller.appspot.com/bug?extid=8357fbef0d7bb602de45
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=102c472e900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13081056900000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: HID: core: Correctly handle ReportSize being zero

For information about bisection process see: https://goo.gl/tpsmEJ#bisection