Re: BUG: corrupted list in p9_conn_cancel

[syzbot]

syzbot suspects this bug was fixed by commit:

commit 9f476d7c540cb57556d3cc7e78704e6cd5100f5f
Author: Tomas Bortoli <tomasbortoli@xxxxxxxxx>
Date:   Mon Jul 23 18:42:53 2018 +0000

    net/9p/trans_fd.c: fix race by holding the lock

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11adad06600000
start commit:   c25c74b7 Merge tag 'trace-v4.18-rc3-2' of git://git.kernel..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=25856fac4e580aa7
dashboard link: https://syzkaller.appspot.com/bug?extid=ad0832746849421bba05
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13d8db0c400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10c12a58400000

If the result looks correct, please mark the bug fixed by replying with:

#syz fix: net/9p/trans_fd.c: fix race by holding the lock

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