Re: Unix, C, int-32-bits and... hardware architecture assumptions

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On Thu, Jul 30, 2026 at 10:16=E2=80=AFPM sur-behoffski <sur-behoffski@grous=
e.com.au>
wrote:


> There's a keynote address from USENIX ATC '21, that shows how
> e.g. "QualPwn" can exploit this:  A malicious wi-fi packet can
> potentially gain access to all of system memory via the SMMU
> of the wi-fi connection, bypassing any other MMU infrastructure:
>
>         "USENIX ATC '21/OSDI '21 Joint Keynote Address-It's Time
>         for Operating Systems to Rediscover Hardware
>         [36myc8wQhLo].webm"
>
>         (Presenter: Prof.(CS) Timothy Roscoe, ETH Zurich.)
>
> Link: https://www.usenix.org/conference/atc21/presentation/fri-keynote

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote g=
mail_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Jul 30,=
 2026 at 10:16=E2=80=AFPM sur-behoffski &lt;<a href=3D"mailto:sur-behoffski=
@grouse.com.au">[email protected]</a>&gt; wrote:<br></div><div>=
=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">There&#39;s a=
 keynote address from USENIX ATC &#39;21, that shows how<br>
e.g. &quot;QualPwn&quot; can exploit this:=C2=A0 A malicious wi-fi packet c=
an<br>
potentially gain access to all of system memory via the SMMU<br>
of the wi-fi connection, bypassing any other MMU infrastructure:<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 &quot;USENIX ATC &#39;21/OSDI &#39;21 Joint Key=
note Address-It&#39;s Time<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 for Operating Systems to Rediscover Hardware<br=
>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 [36myc8wQhLo].webm&quot;<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 (Presenter: Prof.(CS) Timothy Roscoe, ETH Zuric=
h.)<br>
<br>Link:=C2=A0<a href=3D"https://www.usenix.org/conference/atc21/presentat=
ion/fri-keynote">https://www.usenix.org/conference/atc21/presentation/fri-k=
eynote</a></blockquote></div></div>

<p></p>

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