Bug#877445: Certain sites crash Firefox on pre-SSE2 CPUs

[Sylvestre Ledru]

severity 877445 wishlist
thanks

Le 01/10/2017 à 22:54, Fanael Linithien a écrit :
> Package: firefox
> Version: 56.0-2
> Severity: important
>
> Visiting certain sites such as github crashes with SIGILL on Pentium
> III and other CPUs with no SSE2 support due to some parts of Firefox
> code assuming SSE2 unconditionally. While the upstream doesn't support
> pre-SSE2 processors anymore, my understanding is that the Debian
> package does, and therefore it's a bug. AFAIU the fix shouldn't be too
> invasive, because the upstream sources still pretty much *have to*,
> and do, contain scalar fallbacks for non-x86 platforms.

First, I am not the maintainer of Firefox.

However, if I were, I would won't fix this bug. CPU without SSE2 are now
rare
and the performance drop for not using SSE2 being enough that it should
remain enabled by default (AFAIK, this is done at build time, not at
runtime).

More information here:
https://chuttenblog.wordpress.com/2016/02/10/sse2-support-in-firefox-users/

Sylvestre


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.alioth.debian.org/pipermail/pkg-mozilla-maintainers/attachments/20171001/8350f31a/attachment.html>