syzbot has bisected this bug to:

commit 0fff724a33917ac581b5825375d0b57affedee76 Author: Paul Kocialkowski paul.kocialkowski@bootlin.com Date: Fri Jan 18 14:51:13 2019 +0000

drm/sun4i: backend: Use explicit fourcc helpers for packed YUV422 check

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1467550f200000 start commit: 0e40da3e Merge tag 'kbuild-fixes-v5.1' of git://git.kernel.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=1667550f200000 console output: https://syzkaller.appspot.com/x/log.txt?x=1267550f200000 kernel config: https://syzkaller.appspot.com/x/.config?x=8dcdce25ea72bedf dashboard link: https://syzkaller.appspot.com/bug?extid=2ff1e7cb738fd3c41113 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16973653200000

Reported-by: syzbot+2ff1e7cb738fd3c41113@syzkaller.appspotmail.com Fixes: 0fff724a3391 ("drm/sun4i: backend: Use explicit fourcc helpers for packed YUV422 check")

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