WARNING in drm_mode_createblob_ioctl

[syzbot]

syzbot has bisected this bug to:

commit 9e5a64c71b2f70ba530f8156046dd7dfb8a7a0ba
Author: Kees Cook <keescook at chromium.org>
Date:   Mon Nov 4 22:57:23 2019 +0000

     uaccess: disallow > INT_MAX copy sizes

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=125fe6dce00000
start commit:   51309b9d Add linux-next specific files for 20191105
git tree:       linux-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=115fe6dce00000
console output: https://syzkaller.appspot.com/x/log.txt?x=165fe6dce00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a9b1a641c1f1fc52
dashboard link: https://syzkaller.appspot.com/bug?extid=fb77e97ebf0612ee6914
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1212dc3ae00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=145f604ae00000

Reported-by: syzbot+fb77e97ebf0612ee6914 at syzkaller.appspotmail.com
Fixes: 9e5a64c71b2f ("uaccess: disallow > INT_MAX copy sizes")

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