syzbot has bisected this bug to:
commit 0161028b7c8aebef64194d3d73e43bc3b53b5c66
Author: Andy Lutomirski <luto@xxxxxxxxxx>
Date: Mon May 9 22:48:51 2016 +0000
perf/core: Change the default paranoia level to 2
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15910e86e00000
start commit: 18d0eae3 Merge tag 'char-misc-4.20-rc1' of git://git.kerne..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=17910e86e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=13910e86e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=342f43de913c81b9
dashboard link: https://syzkaller.appspot.com/bug?extid=6b074f741adbd93d2df5
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12482713400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158fd4a3400000
Reported-by: syzbot+6b074f741adbd93d2df5@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 0161028b7c8a ("perf/core: Change the default paranoia level to 2")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
