linux-kernel - Re: [PATCH v2] kernel/watch_queue: Make pipe NULL while clearing watch

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Message-ID: <1822f2dbbef.8458d4be628891.5196957454517111607@siddh.me>
Date:   Sun, 24 Jul 2022 13:18:22 +0530
From:   Siddh Raman Pant <code@...dh.me>
To:     "Hillf Danton" <hdanton@...a.com>
Cc:     "David Howells" <dhowells@...hat.com>,
        "Fabio M. De Francesco" <fmdefrancesco@...il.com>,
        "linux-kernel" <linux-kernel@...r.kernel.org>,
        "syzbot+c70d87ac1d001f29a058" 
        <syzbot+c70d87ac1d001f29a058@...kaller.appspotmail.com>,
        "linux-security-modules" <linux-security-module@...r.kernel.org>,
        "linux-kernel-mentees" 
        <linux-kernel-mentees@...ts.linuxfoundation.org>
Subject: Re: [PATCH v2] kernel/watch_queue: Make pipe NULL while clearing
 watch_queue

On Sun, 24 Jul 2022 12:49:58 +0530  Hillf Danton <hdanton@...a.com> wrote:
> Given defunct serialized, still need to clear wqueue->pipe in the clear
> path as proposed?

I am not sure what you mean by this...

If you mean freeing the pipe, it is done by free_pipe_info(), which is
the caller of watch_queue_clear().

If you mean making wqueue->pipe NULL, it is being done so in the patch.

Thanks,
Siddh