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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A8787C55179 for ; Mon, 3 Aug 2026 13:17:55 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B3D536B009E; Mon, 3 Aug 2026 09:17:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AC61C6B00A0; Mon, 3 Aug 2026 09:17:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 98D826B00A2; Mon, 3 Aug 2026 09:17:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 76EEE6B009E for ; Mon, 3 Aug 2026 09:17:54 -0400 (EDT) Received: from smtpin10.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 0C12B406DE for ; Mon, 3 Aug 2026 12:02:16 +0000 (UTC) X-FDA: 85059820272.10.EA451D7 Received: from out-182.mta1.migadu.com (out-182.mta1.migadu.com [95.215.58.182]) by imf21.hostedemail.com (Postfix) with ESMTP id 154011C0016 for ; Mon, 3 Aug 2026 12:02:13 +0000 (UTC) Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=EnouUtAw; spf=pass (imf21.hostedemail.com: domain of ruirui.yang@linux.dev designates 95.215.58.182 as permitted sender) smtp.mailfrom=ruirui.yang@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1785758534; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=52EZk8YPwTy+jG8rvfx/kfwJ0amdCbdlhZF4BPxa9n0=; b=XMf2T68scyjpST1MrX1WjLFUywCLAUbDRDNtGgbjAi7etew0Hvy6nJXQxTLqAHNe8tADYT pFVi5kntVFydTLoGE5b7B0Ivf8VlY+QCAKvxl2dhL9nn17xsCH2naibPhX4fN5qKhCyre1 S6TBjagwyX7RxDDaG/zRpVq1e/6cHGw= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=EnouUtAw; spf=pass (imf21.hostedemail.com: domain of ruirui.yang@linux.dev designates 95.215.58.182 as permitted sender) smtp.mailfrom=ruirui.yang@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1785758534; b=n5yimsQ05lC68R9RR/I5Pj7sEsD3A3yWUzMmXFIVeuxQy87xjWXBhoHVQNZ4DA93oVqnJX O4QH+WhnWWmyR2+16Sy4WEZiWnTPBw/EAiiJg6TMS+Wu1G/WB5VnuUYYgRFBDU9AxzQau4 Ve3rD8Qd25uFDYr7VlHmeXlW06Ub76Y= Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1785758532; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=52EZk8YPwTy+jG8rvfx/kfwJ0amdCbdlhZF4BPxa9n0=; b=EnouUtAwmdUyiYMkNZYeTEKz+AWGqvGLFPzrRg2VSPbHDC6HVF7FROS4eLHrg3gT8tooRk rig62DQPA5EaSsWXf6iA3G0v/XDaJ6BmV1oe49+5hzRGn2f3z2n2yirXt1Il6HlfYyxdck yb7BufJLbG3lqJtL+aY1dN0OwdZGnlw= Date: Mon, 3 Aug 2026 20:00:32 +0800 MIME-Version: 1.0 Subject: Re: [PATCH 0/4] CRASH_ZEROIZE: Wipe secrets before kdump To: David Howells Cc: =?UTF-8?Q?Jan_Sebastian_G=C3=B6tte?= , Baoquan He , Andrew Morton , Mike Rapoport , Pasha Tatashin , Pratyush Yadav , Jarkko Sakkinen , Paul Moore , James Morris , "Serge E. Hallyn" , Mimi Zohar , James Bottomley , Rob Herring , Saravana Kannan , Coiby Xu , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, keyrings@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, linux-integrity@vger.kernel.org, Tao Liu References: <79610b53-5201-4af3-913a-0c4dcbb6f9d6@linux.dev> <20260731154608.153258-1-linux@jaseg.de> <74625f78-15ea-439f-b9f0-939d2976fa7f@jaseg.de> <2490025.1785751199@warthog.procyon.org.uk> Content-Language: en-US X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Dave Young In-Reply-To: <2490025.1785751199@warthog.procyon.org.uk> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 154011C0016 X-Rspam-User: X-Stat-Signature: nk8zdqjtf35jydziyyrtrajgwu9tbs1e X-Rspamd-Server: rspam04 X-HE-Tag: 1785758533-617638 X-HE-Meta: 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 NZU1qfNx EzHleyfc2pgtfSBq1BS1rz6ri99Jippq2CawP8Sg/IVG4qAxhC0igra7bA1Qt2iS1/dqVEdMAn9OkZ+pud1qpw9OfXDLsanAAjXJ1DxylnYQ/ATtMCUp3fZ7KQVV0nt8LCD+MHa683h92CDaBDMCDuuaATyqiZfdHyjN0YIL3JHgBnqBiDpOTvjrshHWwm8B/fh9aAyvwYnqpOdy2qWvzTcV2lKo2W180RzMECBtLXJz2DxBkRcuVUrAY4I0J1AdYUl3DqTlQQsASG6KcrcKy3D/ajINvk+X8v6FHjnSJSEkn3u7w/D0P8eHLRYrJATRaVu+B5S/IZx4SGAcIy+ecOUJ4C41MkZx8sa8Ds54kQZHJe1M= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/3/26 5:59 PM, David Howells wrote: > Dave Young wrote: > >> Cleaning up secret data can be done with makedumpfile + eppic scripts (see >> the manual of makedumpfile), or it is even possible to do so in kdump kernel >> with Tao Liu's improvments for makedumpfile previously (I don't know the >> status, probably dropped for the time being, but it is possible, cced him). > > Does this represent a leak of the secrets? Also do governmental > standardisation bodies have opinions on what constitutes a leak? It depends, for the crash case I'm not against to clear sensitive data, the concern is to avoid extra complexity of logic pre-kdump. Which government? Sorry I can not answer here. > > David >