linux-kernel - Re: O_NOLINK for open()

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Message-Id: <E1IW8R4-0000ko-2z@be1.lrz>
Date:	Fri, 14 Sep 2007 12:30:05 +0200
From:	Bodo Eggert <7eggert@....de>
To:	Brent Casavant <bcasavan@....com>,
	Gabor Gombas <gombasg@...aki.hu>, linux-kernel@...r.kernel.org
Subject: Re: O_NOLINK for open()

Brent Casavant <bcasavan@....com> wrote:

[...]
> Hmm.  This will work as long as the peer process is running setuid
> to it's own unique user.  Excellent idea!  Since I need to make the
> program setuid to avoid non-priveleged ptrace attacks, this is a
> terrific solution.

Tried that:

~ > cd tmp
~/tmp > cp /bin/sleep .
~/tmp > chmod u+s sleep
~/tmp > ./sleep 2147483647 &
[1] 2823
~/tmp > strace -p 2823
Process 2823 attached - interrupt to quit
setup(

-- 
Top 100 things you don't want the sysadmin to say:
27. You can do this patch with the system up...

Friß, Spammer: 7TdJfPsslN@...aOy.7eggert.dyndns.org
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