From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark H Weaver <mhw@netris.org>
Subject: Re: Meltdown / Spectre
Date: Sun, 07 Jan 2018 01:38:40 -0500
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References: <874lnzcedp.fsf@gmail.com> <20180106174358.GA28436@jasmine.lan>
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In-Reply-To: <87vageeobi.fsf@netris.org> (Mark H. Weaver's message of "Sat, 06
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To: Leo Famulari <leo@famulari.name>
Cc: guix-devel@gnu.org

Mark H Weaver <mhw@netris.org> writes:

> Leo Famulari <leo@famulari.name> writes:
>
>> The Spectre bugs have to be fixed per-application for now. As far as I
>> know, we haven't made any related changes to packages besides
>> linux-libre.
>>
>> Mozilla has released an update that is supposed to mitigate the
>> vulnerability but I don't if they'll be porting it back to the extended
>> support release that Icecat is based on.
>
> I just backported the Spectre mitigation from Firefox 57.0.4 to IceCat,
> and pushed it to master here:
>
>   https://git.savannah.gnu.org/cgit/guix.git/commit/?id=c23243fccd4f73430ca06a862acd33c020c8ed17

I just followed this up with a Spectre mitigation for WebKitGTK+
backported from upstream WebKit:

  https://git.savannah.gnu.org/cgit/guix.git/commit/?id=56804398a94bea941183ae4ed29d2a9f82069a6f

Note that WebKitGTK+ had already reduced the resolution of
performance.now() to 100 microseconds over a year ago:

  https://bugs.webkit.org/show_bug.cgi?id=165503

       Mark