linux-kernel - Re: 2.6.25-rc2-mm1: WARNING at arch/x86/mm/ioremap.c:129

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]

Date:	Sun, 17 Feb 2008 21:18:41 -0800
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	"Brown, Len" <len.brown@...el.com>
Cc:	"Laurent Riffard" <laurent.riffard@...e.fr>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	<linux-kernel@...r.kernel.org>, "Stuart Bennett" <sb476@....ac.uk>
Subject: Re: 2.6.25-rc2-mm1: WARNING at arch/x86/mm/ioremap.c:129

On Sun, 17 Feb 2008 23:58:03 -0500
"Brown, Len" <len.brown@...el.com> wrote:

> >Len: This WARN_ON says that ACPI is trying to call ioremap() 
> >on memory that the e820_table
> >lists as "kernel owned". Do you know why ACPI would do this? 
> >Would ACPI get upset if
> >the kernel would tell it to take a hike?
> 
> Depends on the BIOS -- as it is the BIOS AML that is making this
> request.

is there any possible valid scenario where the BIOS AML would touch memory the 
kernel is using? (Since that seems to be what is going on; I'll cook up a diagnostics
patch to get more info but the warning gets spewed if ioremap() is trying to map
memory the kernel sees as ram)


-- 
If you want to reach me at my work email, use arjan@...ux.intel.com
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
--
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/