syzbot has bisected this issue to:
commit 9b4feb630e8e9801603f3cab3a36369e3c1cf88d
Author: Christian Brauner <christian.brauner@xxxxxxxxxx>
Date: Fri May 24 09:31:44 2019 +0000
arch: wire-up close_range()
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1323329ba80000
start commit: 89d77f71f493 Merge tag 'riscv-for-linus-6.4-mw1' of git://..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=10a3329ba80000
console output: https://syzkaller.appspot.com/x/log.txt?x=1723329ba80000
kernel config: https://syzkaller.appspot.com/x/.config?x=d963e7536cbe545e
dashboard link: https://syzkaller.appspot.com/bug?extid=d6b0b0ea0781c14b2ecf
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11471b84280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10b98e2c280000
Reported-by: syzbot+d6b0b0ea0781c14b2ecf@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 9b4feb630e8e ("arch: wire-up close_range()")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
