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Date: Tue, 08 Mar 2016 10:48:17 +1100
From: James Morris <james.l.morris@oracle.com>
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To: Andy Lutomirski <luto@amacapital.net>,
        Khalid Aziz <khalid.aziz@oracle.com>
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Subject: Re: [PATCH v2] sparc64: Add support for Application Data Integrity
 (ADI)
References: <1456951177-23579-1-git-send-email-khalid.aziz@oracle.com> <20160305.230702.1325379875282120281.davem@davemloft.net> <56DD9949.1000106@oracle.com> <20160307.115626.807716799249471744.davem@davemloft.net> <56DDC2B6.6020009@oracle.com> <CALCETrXN43nT4zq2MpO90VrgK3k+DKHjOHWf7iOhS7TSBmdCPQ@mail.gmail.com> <56DDC6E0.4000907@oracle.com> <CALCETrU5NCzh3b7We8903G0_Tm-oycgP3+gS9fG+vC_rdgTddw@mail.gmail.com> <56DDDA31.9090105@oracle.com> <CALCETrXXU0fs2ezq+Wn_kr4dZTO=0RJmt6b=XBSA-wM7W_9j9A@mail.gmail.com>
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On 03/08/2016 06:54 AM, Andy Lutomirski wrote:
>
> This makes sense, but I still think the design is poor.  If the hacker
> gets code execution, then they can trivially brute force the ADI bits.
>

ADI in this scenario is intended to prevent the attacker from gaining 
code execution in the first place.