linux-kernel - Re: [PATCH 15/19] vfs: Add superblock notifications [ver #16]

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Message-ID: <2125809.1582305091@warthog.procyon.org.uk>
Date:   Fri, 21 Feb 2020 17:11:31 +0000
From:   David Howells <dhowells@...hat.com>
To:     Jann Horn <jannh@...gle.com>
Cc:     dhowells@...hat.com, Al Viro <viro@...iv.linux.org.uk>,
        raven@...maw.net, Miklos Szeredi <mszeredi@...hat.com>,
        Christian Brauner <christian@...uner.io>,
        Linux API <linux-api@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 15/19] vfs: Add superblock notifications [ver #16]

Jann Horn <jannh@...gle.com> wrote:

> If another thread concurrently runs close(watch_fd)

Fair point.  We have the watch queue pinned, but watch_queue_clear() is called
before the ref is released.

David