From owner-freebsd-questions@FreeBSD.ORG Tue Apr 26 10:36:40 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4C66E1065672 for ; Tue, 26 Apr 2011 10:36:40 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: from mail-ww0-f50.google.com (mail-ww0-f50.google.com [74.125.82.50]) by mx1.freebsd.org (Postfix) with ESMTP id D0FB08FC08 for ; Tue, 26 Apr 2011 10:36:39 +0000 (UTC) Received: by wwc33 with SMTP id 33so430631wwc.31 for ; Tue, 26 Apr 2011 03:36:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:date:from:to:subject:message-id:in-reply-to :references:x-mailer:mime-version:content-type :content-transfer-encoding; bh=ETvCiSfypVQ/YaR0MT7J2S80Odwn5vobzjkx3q/33xw=; b=p9LPPQMsQYmdOB7G8jNdX5JH/KRaiVWC9OTEBwCJ//yv2vpPHrEx4BoSuDSxTZCbEu jAY4w/PRTu9ih6ImICl+DxYZIWZazkc4F71biH2DGMQ911lAcKt4j4vg20zMZ8T92NRK dQh1JL79RormlTGkeTvpXrVjvsI1Lq/mnnl20= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=date:from:to:subject:message-id:in-reply-to:references:x-mailer :mime-version:content-type:content-transfer-encoding; b=Cpt0dF0GcahIb51Z56RcLvL4UvOQERYBVl8AF7brICAX6KJARVbNt+lzsu8+1kWJ+o FP2Zzs8RjIvoJMf6FBPOZB+GfoQoS7hta9fDYkK7Z2Z+YNuYpH2G84JiMkUTpaumTslM xPuijTC9/D5NBDfwoway2n+2eZ47tMpBjLIYE= Received: by 10.216.142.34 with SMTP id h34mr4476526wej.28.1303814198692; Tue, 26 Apr 2011 03:36:38 -0700 (PDT) Received: from gumby.homeunix.com (87-194-105-247.bethere.co.uk [87.194.105.247]) by mx.google.com with ESMTPS id ed10sm3750445wbb.66.2011.04.26.03.36.35 (version=SSLv3 cipher=OTHER); Tue, 26 Apr 2011 03:36:37 -0700 (PDT) Date: Tue, 26 Apr 2011 11:36:31 +0100 From: RW To: freebsd-questions@freebsd.org Message-ID: <20110426113631.54dc02a9@gumby.homeunix.com> In-Reply-To: <20110426104853.00005460@unknown> References: <20110425151846.0a5359fd@gumby.homeunix.com> <20110425151536.GA61425@stainmore> <20110425175420.GA61811@stainmore> <20110425232908.4104e026@gumby.homeunix.com> <20110426104853.00005460@unknown> X-Mailer: Claws Mail 3.7.8 (GTK+ 2.22.1; i386-portbld-freebsd8.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: Password theft from memory? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Apr 2011 10:36:40 -0000 On Tue, 26 Apr 2011 10:48:53 +0100 Bruce Cran wrote: > On Mon, 25 Apr 2011 23:29:08 +0100 > RW wrote: > > > The reason I thought that heap memory isn't zeroed is from the > > discussion of pre-zeroed pages in this article: > > There's an idlezero task that runs by default (via > the vm.idlezero_enable sysctl), zeroing unused pages, That's pretty much what the article is describing. It's actually *off* by default in 8.2 because it causes lock-ups.