linux-kernel - Re: RELEASE BLOCKER: Linux doesn't follow x86/x86-64 ABI wrt direction flag

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Message-ID: <20080306183146.GL27983@randombit.net>
Date:	Thu, 6 Mar 2008 13:31:46 -0500
From:	Jack Lloyd <lloyd@...dombit.net>
To:	gcc@....gnu.org, linux-kernel@...r.kernel.org
Subject: Re: RELEASE BLOCKER: Linux doesn't follow x86/x86-64 ABI wrt direction    flag

On Thu, Mar 06, 2008 at 07:13:20PM +0100, Paolo Bonzini wrote:
> A process can send a signal via kill.  IOW, a malicious process can 
> *control when the process would be interrupted* in order to get it into 
> the signal handler with DF=1.

If the malicious process can send a signal to another process, it
could also ptrace() it. Which is more useful, if you wanted to be
malicious?

Jack
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