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 EEB69C5AC67 for ; Tue, 11 Aug 2026 20:43:11 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CA07D6B0092; Tue, 11 Aug 2026 16:43:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C524B6B0093; Tue, 11 Aug 2026 16:43:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B1B5D6B00AB; Tue, 11 Aug 2026 16:43:10 -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 880FC6B0092 for ; Tue, 11 Aug 2026 16:43:10 -0400 (EDT) Received: from smtpin28.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 243091A0133 for ; Tue, 11 Aug 2026 20:43:10 +0000 (UTC) X-FDA: 85090163340.28.D54DCF9 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf12.hostedemail.com (Postfix) with ESMTP id 7990640008 for ; Tue, 11 Aug 2026 20:43:08 +0000 (UTC) Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=YXLgdApM; spf=pass (imf12.hostedemail.com: domain of ebiggers@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=ebiggers@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1786480988; 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=tmqgrBJxUvss5ev2qg4hR/y+Shhz4DNLrdh9R3vpGbM=; b=4SVv5FRA/eJCmA2LJv/ZjoTGuCKPtsRHfpNbvm4f5XpcGiJKB7z2mvi5DlFMddnZMvW0zc T+iXibOHSU9l7jVGB8uMVcSPVmHCcYtYlyGXpIJGBDcxthBBYDCIRl8uEOI4un3bFp2+da 5OKA8JgobIu7nzTEX19lAiyvqnUp04w= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1786480988; b=7zZWBrq/AM6/5Jh1fgjY3Z11ju9Qf+MfSWAXXooOlrB1oC2x8dxxiEwA4BGJ9e2djkwuTv YZN9lXJc9CdctI9u1cmJozftpMKjzY1w1OL11/qUv54FMryif3XVcdE7yvPwAoEESpi9SD DDPKNHB1KYA6MQ2X+gwBduPug+OvexY= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=YXLgdApM; spf=pass (imf12.hostedemail.com: domain of ebiggers@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=ebiggers@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id F1D11600AE; Tue, 11 Aug 2026 20:43:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 049C71F000E9; Tue, 11 Aug 2026 20:43:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786480986; bh=tmqgrBJxUvss5ev2qg4hR/y+Shhz4DNLrdh9R3vpGbM=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=YXLgdApMQVjB8O5UsuRCftLgsXmP3cSJYvwGgrqZ6b+hB2edLW/uSBh3oj2DAKDLB 6IioToKp+fdIkMueq1I/JRHsiwugXBDmJ97vp4UxyiCAtTlbgjkSl4kj3fA2aKAij5 Qgg6Hbg7EYU+2aNCB4H6ya401I1ujfkQIF2fhblv0bLnVJ432LahjN1sFPCZeRdz14 Cw5oUW8a78hswG6XALU3IdgCkVcHjig6EUfeU9hkjUA2GGFHo2hnqTAj7OaCds1AU4 UNwXanpKaMexoPY5I1l0K/a0V8GThMm0LE5dEKAkZ0GBpRhjDX5FR/2e1tnXNyczMQ ftS06T2V5gAHQ== Date: Tue, 11 Aug 2026 13:41:01 -0700 From: Eric Biggers To: Jan Sebastian =?iso-8859-1?Q?G=F6tte?= Cc: Jan Sebastian =?iso-8859-1?Q?G=F6tte?= , Andrew Morton , Baoquan He , Mike Rapoport , Pasha Tatashin , Pratyush Yadav , Dave Young , Catalin Marinas , Will Deacon , David Howells , Jarkko Sakkinen , Jonathan Corbet , Shuah Khan , Paul Moore , James Morris , "Serge E. Hallyn" , Lukas Wunner , Ignat Korchagin , Herbert Xu , "David S. Miller" , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , Trond Myklebust , Anna Schumaker , Mimi Zohar , James Bottomley , Marc Dionne , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , "Theodore Y. Ts'o" , Jaegeuk Kim , Alexander Viro , Christian Brauner , Jan Kara , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , Benjamin Marzinski , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, keyrings@vger.kernel.org, linux-doc@vger.kernel.org, linux-security-module@vger.kernel.org, linux-crypto@vger.kernel.org, linux-nvme@lists.infradead.org, linux-nfs@vger.kernel.org, linux-integrity@vger.kernel.org, linux-afs@lists.infradead.org, netdev@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org, dm-devel@lists.linux.dev Subject: Re: [PATCH v2 00/13] CRASH_WIPE_SECRETS: Wipe secrets before kdump (was: CRASH_ZEROIZE) Message-ID: <20260811204101.GA1905@sol> References: <20260811-crash-zeroize-rework-v2-0-9561d13c2340@jaseg.de> <20260811182012.GB2895176@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspam-User: X-Stat-Signature: 6ixkbwdg785m3eejo4pphbj7116hjeei X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 7990640008 X-HE-Tag: 1786480988-42193 X-HE-Meta: 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 HrXUGZvE m6ewNrKlz0MzQAjqLIIRT8/juS/Pmd2aVpF1TgYfB0vQQWRBfnzGB4XbO0stXCauQIC34dmxET/PM80aM7PfJFa+ZoIFD1yIGb+W8PO1CUzMEl/oLafZVw8nuaUoqJMZRv0k5iXZhfN1kCDJQ+/T3svxb8ZIHBeVM4rzfc8/ZFU8BYMSq7lqRjvAFJHuWHLUgNEXNHQWltOSr0q6RkbLWApc7nXfmUkslJ7xe+Ewj3ty7mb85VybgNTdDR6/IXDvAq+xro+sqaaojDrFI13BvH5ISzrF0ju0lmvTVYk6BohdREYj5CTFKRfNFH0Z4OVf/mzVSQ+SEdja0pjUTKFxsrGZJkKWtGR8XkLsnGVmOSf+pv7txPdm8Qia8RcdESI6MyCZ3PZKXbnAUejs= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Aug 11, 2026 at 09:38:20PM +0200, Jan Sebastian Götte wrote: > > Could you perhaps narrow the scope to one or two things that actually > > are useful and can reasonably be supported for the application? For > > example, secretmem seems to be the only thing you mentioned that you're > > actually planning to use. > > I'm open to whittling down the scope of this series. In my use case I need > at least secretmem as well as dm-crypt, which then pulls in the crypto tfm > stuff. Personally, I could live without the other bits, I just thought > they'd be easy enough to include. Please do reduce the scope. Note that even if dm-crypt is in scope, "crypto: api - wipe tfm contexts before kdump" is neither required nor sufficient. For one, dm-crypt has its own copy of the key. The wiping should be done by the kernel feature(s) that need it, as they know what actually needs to be wiped, and they can do so without the bottleneck of a new global list. - Eric