linux-kernel - Re: [PATCH 07/12] perf_events: add LBR software filter support for Intel X86

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:	Fri, 07 Oct 2011 20:54:45 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	mingo@...e.hu, acme@...hat.com, ming.m.lin@...el.com,
	robert.richter@....com, ravitillo@....gov
Subject: Re: [PATCH 07/12] perf_events: add LBR software filter support for
 Intel X86

(2011/10/07 20:21), Peter Zijlstra wrote:
> On Fri, 2011-10-07 at 13:18 +0200, Peter Zijlstra wrote:
>>> Yeah, depending on the depth of the LBR. But then what happens, you
>>> decode an instruction that is not what was executed. 
>>
>> Right, and Andi's concern is that this might cause our instruction
>> decoder to blow up, or worse. 
> 
> That is, we have a fair confidence that its capable of correctly
> decoding correct streams, but I understood from Masami that they haven't
> actually tried feeding it crap.

OK, I'll do hardening it.

Thanks,

-- 
Masami HIRAMATSU
Software Platform Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com
--
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/