syzbot has bisected this issue to:
commit 81238b2cff1469ff5b94390d026cd075105d6dcd
Author: Christoph Hellwig <hch@xxxxxx>
Date: Thu May 7 17:33:03 2020 +0000
fs: implement kernel_write using __kernel_write
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10d829bf100000
start commit: be978f8f Add linux-next specific files for 20200713
git tree: linux-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=12d829bf100000
console output: https://syzkaller.appspot.com/x/log.txt?x=14d829bf100000
kernel config: https://syzkaller.appspot.com/x/.config?x=3fe4fccb94cbc1a6
dashboard link: https://syzkaller.appspot.com/bug?extid=e6f77e16ff68b2434a2c
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11fe004f100000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16d35f33100000
Reported-by: syzbot+e6f77e16ff68b2434a2c@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 81238b2cff14 ("fs: implement kernel_write using __kernel_write")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
