linux-kernel - Re: [PATCH 02/17] exec: Simplify unshare

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Message-ID: <20200818100821.lvxkmw3l5bs56bls@wittgenstein>
Date:   Tue, 18 Aug 2020 12:08:21 +0200
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        criu@...nvz.org, bpf@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Oleg Nesterov <oleg@...hat.com>,
        Cyrill Gorcunov <gorcunov@...il.com>,
        Jann Horn <jann@...jh.net>, Kees Cook <keescook@...omium.org>,
        Daniel P. Berrangé <berrange@...hat.com>,
        Jeff Layton <jlayton@...hat.com>,
        Miklos Szeredi <miklos@...redi.hu>,
        Matthew Wilcox <willy@...ian.org>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        Matthew Wilcox <matthew@....cx>,
        Trond Myklebust <trond.myklebust@....uio.no>,
        Chris Wright <chrisw@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>
Subject: Re: [PATCH 02/17] exec: Simplify unshare_files

On Mon, Aug 17, 2020 at 05:04:10PM -0500, Eric W. Biederman wrote:
> Now that exec no longer needs to return the unshared files to their
> previous value there is no reason to return displaced.
> 
> Instead when unshare_fd creates a copy of the file table, call
> put_files_struct before returning from unshare_files.
> 
> Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
> ---

Looks good.
Acked-by: Christian Brauner <christian.brauner@...ntu.com>