linux-kernel - Re: [PATCH] pci: fix crash about old IA64 about pci_cfg_space

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Message-ID: <20091011213245.GC18513@grsecurity.net>
Date:	Sun, 11 Oct 2009 17:32:45 -0400
From:	spender@...ecurity.net (Brad Spengler)
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Matthew Wilcox <matthew@....cx>
Subject: Re: [PATCH] pci: fix crash about old IA64 about pci_cfg_space_size

> Brad reported that his SGI 750 (Itanium 1) will crash from 2.6.26, and 
> bisected

2.6.26 to 2.6.29 are fine -- the commit responsible was introduced in 2.6.30, 
so only those kernels >= 2.6.30 exhibit the problem.  For searching 
purposes (so that Debian unstable etc can backport the fix to their 
2.6.30 kernel), the error causing the panic at boot was:

General Exception: IA-64 Reserved Register/Field fault (data access) 48

and occurred a few lines after "ACPI: PCI Root Bridge [PCI0] (0000:00)"

-Brad

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