From: Linus Torvalds <torvalds@linux-foundation.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: syzbot <syzbot+75639e6a0331cd61d3e2@syzkaller.appspotmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
jordy@jordyzomer.github.io, jordy@pwning.systems,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>
Subject: Re: [syzbot] WARNING: refcount bug in memfd_secret
Date: Mon, 25 Oct 2021 10:00:22 -0700 [thread overview]
Message-ID: <CAHk-=wiJRdV-7NYvh+8mzDtuPvTg6PHHUedeVXjY92+gxhYJbw@mail.gmail.com> (raw)
In-Reply-To: <YXW9lmQVx1PLX9aj@casper.infradead.org>
On Sun, Oct 24, 2021 at 1:10 PM Matthew Wilcox <willy@infradead.org> wrote:
>
> I agree with you and suggested that if anybody really cares (I mean,
> you need a multi-TB machine to produce this problem) that we simply do
> what we did with the page refcount:
Ack. That looks like the right thing to do.
> + if (atomic_read(&secretmem_users) < 0)
> + return -ENFILE;
If somebody sends me a proper patch with a sign-off etc, I'll happily
apply that two-liner. Hint hint.
Linus
prev parent reply other threads:[~2021-10-25 17:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-23 19:35 syzbot
2021-10-24 19:54 ` Linus Torvalds
2021-10-24 20:09 ` Matthew Wilcox
2021-10-25 6:37 ` Dmitry Vyukov
2021-10-25 17:00 ` Linus Torvalds [this message]
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