User: Password:
Subscribe / Log in / New account

2.6.31 merge window, week 2

2.6.31 merge window, week 2

Posted Jun 25, 2009 14:08 UTC (Thu) by nix (subscriber, #2304)
Parent article: 2.6.31 merge window, week 2

A command stream checker for Radeon r3xx-r5xx hardware has been added to stop user-space processes from accessing memory outside of what they own.
This wasn't already present?! Wasn't this a gigantic security hole? (If not, why not?)

(Log in to post comments)

2.6.31 merge window, week 2

Posted Jun 25, 2009 16:23 UTC (Thu) by elanthis (guest, #6227) [Link]

Yes, but that was experimental code, not meant to be used by the general populace just yet and hence not enabled by default in kernel builds. The whole radeon-CP, TTM, DRI2, KMS stuff is all brand new, after all. Some distros have been enabling it by default, granted, but that's their security failing. :)

Note that the new checker is about video memory, not general process memory, so the security implications are a bit limited (although still serious enough to warrant fixing on multi-user systems, of course).

2.6.31 merge window, week 2

Posted Jun 25, 2009 19:07 UTC (Thu) by nix (subscriber, #2304) [Link]

Ah, good, it's not as bad as the mach64 DRI, which was never merged
anywhere because it allowed the video card to be instructed to DMA over

2.6.31 merge window, week 2

Posted Jul 3, 2009 1:17 UTC (Fri) by kabloom (guest, #59417) [Link]

It appears from last week's story about the merge window that this code is the second part of Radeon Kernel Modesetting which was merged last week, and it wasn't necessary before.

Copyright © 2017, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds