linux-kernel - Re: 2.6.37.1 s2disk regression (TPM)

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: <4D62D930.8060304@linux.vnet.ibm.com>
Date:	Mon, 21 Feb 2011 16:29:20 -0500
From:	Stefan Berger <stefanb@...ux.vnet.ibm.com>
To:	Jiri Slaby <jirislaby@...il.com>
CC:	Rajiv Andrade <srajiv@...ux.vnet.ibm.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	linux-pm <linux-pm@...ts.linux-foundation.org>,
	stable@...nel.org,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	debora@...ux.vnet.ibm.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	preining@...ic.at
Subject: Re: 2.6.37.1 s2disk regression (TPM)

On 02/21/2011 03:39 PM, Jiri Slaby wrote:
> On 02/21/2011 06:12 PM, Rajiv Andrade wrote:
>> On 02/21/2011 01:34 PM, Jiri Slaby wrote:
>>> There has to be another problem which caused my regression. And since it
>>> reports "Operation Timed out", the former default timeout values worked
>>> for me, the ones read from TPM do not.
>> Yes, it's highly due inconsistent timeout values reported by the TPM as
>> I mentioned, my working timeouts are:
>> 3020000 4510000 181000000
> 1000000 2000 150000
>
> Actually the first one from HW is 1. This is one is HZ after correction
> in get_timeout. So perhaps it is in ms, yes.

Following the specs, the timeouts are supposed to be in microseconds and 
ascending order for short, medium and long duration. Of course, if the 
device returns wrong timeouts, the command isn't going to succeed, 
failing the suspend in this case. Nevertheless, I think we need the 
patch I put in but at the same time we'll need a work-around for devices 
like this. There was one person stating that this patch fixed are 
problem on his machine. Can you find the 'caps' entry in /sys 
(/sys/devices/pnp0/00:06) and let us know its content?

Thanks and regards,
     Stefan

--
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/