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Date: Mon, 26 Aug 2013 20:56:22 +0200
From: Oleg Nesterov <oleg@redhat.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Willy Tarreau <w@1wt.eu>,
        Al Viro <viro@zeniv.linux.org.uk>,
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        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux FS Devel <linux-fsdevel@vger.kernel.org>,
        Brad Spengler <spender@grsecurity.net>,
        Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH] proc: make proc_fd_permission() thread-friendly
Message-ID: <20130826185622.GB30917@redhat.com>
References: <20130825052317.GZ27005@ZenIV.linux.org.uk> <20130825065039.GB9299@1wt.eu> <CA+55aFwFeCRcwn4qo570Y15mKrN3jEdN757PcZhrXs7QYi8MYA@mail.gmail.com> <20130825194844.GA16717@redhat.com> <CA+55aFzbY3zYD1i5x02Z-6K3nHKzJj6227ZBYRLqij9y0eXRqQ@mail.gmail.com> <20130826153301.GA15890@redhat.com> <20130826163704.GA21763@redhat.com> <20130826175441.GA28856@redhat.com> <87ioyspaju.fsf@xmission.com> <20130826184631.GA30917@redhat.com>
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On 08/26, Oleg Nesterov wrote:
>
> And I also assume that you agree with this change ;)

At least I hope... Because I think this is another issue.

And because with or without a /proc/thread symlink, I believe that
people don't expect that /proc/self can restrict a sub-thread, and
CLONE_THREAS without CLONE_FILES is exotic.

Oleg.