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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Sun, 24 Mar 2019 18:25:30 -0700
Message-ID: <CAHk-=wiLW+b=r=z3fYGY58WV+qu2qW6Q0_K30Qat0-74-iwvJg@mail.gmail.com>
Subject: Re: KASAN: use-after-free Read in path_lookupat
To:     syzbot <syzbot+7a8ba368b47fdefca61e@syzkaller.appspotmail.com>
Cc:     dledford@redhat.com, Christoph Hellwig <hch@lst.de>,
        Leon Romanovsky <leonro@mellanox.com>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        Sagi Grimberg <sagi@grimberg.me>,
        syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
        Al Viro <viro@zeniv.linux.org.uk>
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On Sun, Mar 24, 2019 at 5:44 PM syzbot
<syzbot+7a8ba368b47fdefca61e@syzkaller.appspotmail.com> wrote:
>
> syzbot has bisected this bug to:
>
> commit a435393acafbf0ecff4deb3e3cb554b34f0d0664

That's wrong. It might change some timing or something to make the
race hit, but it looks entirely unrelated to the bpf path_lookupat
problem.

                 Linus