From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC1CCC433FE for ; Mon, 14 Feb 2022 22:53:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232009AbiBNWxR (ORCPT ); Mon, 14 Feb 2022 17:53:17 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:34146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232000AbiBNWxQ (ORCPT ); Mon, 14 Feb 2022 17:53:16 -0500 Received: from new3-smtp.messagingengine.com (new3-smtp.messagingengine.com [66.111.4.229]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EACCC171870; Mon, 14 Feb 2022 14:53:07 -0800 (PST) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailnew.nyi.internal (Postfix) with ESMTP id AF0BF580632; Mon, 14 Feb 2022 17:53:04 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Mon, 14 Feb 2022 17:53:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=e2LfV2BcYFTZ6ZIg8 FOTVm2MpIs9idDpZ8R+EsQHXrs=; b=SJdNeO/8jyTfLiWOckcAG2OHGKCIILKot CoUd+ViU7KAYtLt39PVDcb/IGuv6zV7lLNGGyCe8EGuQ5DurWAtyc+59koNFynFb Vax9tANM2zkhCcUoof6TNS/nhOKqyPS+Hw3tsgsfWgJvrvYRq/oTiaPhFIsCZ3gq 572A76x7uTT/SQOWr2a+qXWcnzfFPlN8I/AlTAP67o6ZCB+w+xPm/B5psHno61aJ DCH/hrkY5RKmleyp5ih42WMsScPaotRe9Unr3WD7ZeSnt0m2dNzPfz999KUbozwI V020ATKE/pSE4MZC8o1aHNCuKDsllmkkIJSgA7ad0fRyvnrt2DTiw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvvddrjeefgddtfecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpeffhffvufgjkfhfgggtsehttdertddttddvnecuhfhrohhmpefhihhnnhcuvfhh rghinhcuoehfthhhrghinheslhhinhhugidqmheikehkrdhorhhgqeenucggtffrrghtth gvrhhnpeffudfhgeefvdeitedugfelueegheekkeefveffhfeiveetledvhfdtveffteeu udenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpehfth hhrghinheslhhinhhugidqmheikehkrdhorhhg X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 14 Feb 2022 17:53:00 -0500 (EST) Date: Tue, 15 Feb 2022 09:53:11 +1100 (AEDT) From: Finn Thain To: "Jason A. Donenfeld" cc: Joshua Kinard , LKML , Linux Crypto Mailing List , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv , Geert Uytterhoeven , linux-m68k , Thomas Bogendoerfer , "open list:BROADCOM NVRAM DRIVER" , Dominik Brodowski , Eric Biggers , Ard Biesheuvel , Arnd Bergmann , Thomas Gleixner , Andy Lutomirski , Kees Cook , Lennart Poettering , Linus Torvalds , Greg Kroah-Hartman , Theodore Ts'o Subject: Re: [PATCH RFC v0] random: block in /dev/urandom In-Reply-To: Message-ID: References: <20220211210757.612595-1-Jason@zx2c4.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On Mon, 14 Feb 2022, Jason A. Donenfeld wrote: > > So the only systems we're actually talking about without a good cycle > counter are non-Amiga m68k? If so, that'd be a pretty terrific finding. > It'd mean that this idea can move forward, and we only need to worry > about some m68k museum pieces with misconfigured userspaces... > A processor cycle counter is helpful when mounting a timing attack but my museum pieces don't suffer from that problem. Also, they are and always were immune from spectre, meltdown etc. You misrepresent those secure hardware designs as being problematic, just because of some bad advice on some random blogs about RNG API usage. Do you have a phone that no longer gets updates from its vendor? Have you tried patching it? Your insecure museum pieces are the real problem, not my secure ones.