KASAN: slab-out-of-bounds Read in hfa384x_usbin_callback

[syzbot]

Hello,

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

Reported-and-tested-by: syzbot+7d42d68643a35f71ac8a at syzkaller.appspotmail.com

Tested on:

commit:         e17994d1 usb: core: kcov: collect coverage from usb comple..
git tree:       https://github.com/google/kasan.git
kernel config:  https://syzkaller.appspot.com/x/.config?x=5d64370c438bc60
dashboard link: https://syzkaller.appspot.com/bug?extid=7d42d68643a35f71ac8a
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1406d1d3e00000

Note: testing is done by a robot and is best-effort only.