From: "Jason A. Donenfeld" Subject: Re: [kernel-hardening] Re: [PATCH v7 3/6] random: use SipHash in place of MD5 Date: Thu, 22 Dec 2016 16:12:24 +0100 Message-ID: References: <20161216030328.11602-1-Jason@zx2c4.com> <20161221230216.25341-1-Jason@zx2c4.com> <20161221230216.25341-4-Jason@zx2c4.com> <17bd0c70-d2c1-165b-f5b2-252dfca404e8@stressinduktion.org> <20161222054125.lzxhd6ctovm3wk4p@thunk.org> <1482410840.2472.2.camel@stressinduktion.org> <5c306c80-3499-8b92-21d0-c197f30ce326@stressinduktion.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Cc: kernel-hardening@lists.openwall.com, "Theodore Ts'o" , Andy Lutomirski , Netdev , LKML , Linux Crypto Mailing List , David Laight , Eric Dumazet , Linus Torvalds , Eric Biggers , Tom Herbert , Andi Kleen , "David S. Miller" , Jean-Philippe Aumasson To: Hannes Frederic Sowa Return-path: Received: from frisell.zx2c4.com ([192.95.5.64]:38922 "EHLO frisell.zx2c4.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935154AbcLVPND (ORCPT ); Thu, 22 Dec 2016 10:13:03 -0500 In-Reply-To: <5c306c80-3499-8b92-21d0-c197f30ce326@stressinduktion.org> Sender: linux-crypto-owner@vger.kernel.org List-ID: On Thu, Dec 22, 2016 at 4:05 PM, Hannes Frederic Sowa wrote: > This change would need a new version of the ext4 super block, because > you should not change existing file systems. Right. As a first step, I'm considering adding a patch to move halfmd4.c inside the ext4 domain, or at the very least, simply remove it from linux/cryptohash.h. That'll then leave the handful of bizarre sha1 usages to consider.