linux-kernel - Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI motherboard resources

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20070523.160415.26274543.davem@davemloft.net>
Date:	Wed, 23 May 2007 16:04:15 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	torvalds@...ux-foundation.org
Cc:	jbarnes@...tuousgeek.org, hancockr@...w.ca, galibert@...ox.com,
	linux-kernel@...r.kernel.org, ak@...e.de, cebbert@...hat.com,
	lenb@...nel.org
Subject: Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI
 motherboard resources

From: Linus Torvalds <torvalds@...ux-foundation.org>
Date: Wed, 23 May 2007 15:16:23 -0700 (PDT)

> That crap should be seen for the crap it is! Dammit, how hard can it
> be to just admit that mmconfig isn't that great?

I knew mmconfig was broken conceptually the first time I started
seeing write posting "bug fixes" for it that would do a read back from
PCI config space via mmconfig to post the write, which of course has
potential side-effects on the device and is absolutely illegal if the
write just performed put the device into a PM state or whatever.

Truth is stranger than fiction at times.

MMCONFIG is very much an ill-conceived idea.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/