Re: WARNING in media_create_pad_link

[syzbot]

syzbot has bisected this bug to:

commit f2c2e717642c66f7fe7e5dd69b2e8ff5849f4d10
Author: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Date:   Mon Feb 24 16:13:03 2020 +0000

    usb: gadget: add raw-gadget interface

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=126d2b81100000
start commit:   b85051e7 Merge tag 'fixes-for-5.7-rc6' of git://git.kernel..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=116d2b81100000
console output: https://syzkaller.appspot.com/x/log.txt?x=166d2b81100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c33c7f7c5471fd39
dashboard link: https://syzkaller.appspot.com/bug?extid=dd320d114deb3f5bb79b
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16accd06100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1680ce5e100000

Reported-by: syzbot+dd320d114deb3f5bb79b@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface")

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