syzbot has bisected this bug to:
commit 7594bf37ae9ffc434da425120c576909eb33b0bc
Author: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Date: Mon Jul 17 02:53:08 2017 +0000
9p: untangle ->poll() mess
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15e323a6e00000
start commit: d7688697 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13e323a6e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=121b4285bac421fe
dashboard link: https://syzkaller.appspot.com/bug?extid=02d9172bf4c43104cd70
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=119c517ae00000
Reported-by: syzbot+02d9172bf4c43104cd70@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 7594bf37ae9f ("9p: untangle ->poll() mess")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
