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]) by smtp.lore.kernel.org (Postfix) with ESMTP id B96FCC3DA7F for ; Tue, 30 Jul 2024 22:48:09 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 597686B007B; Tue, 30 Jul 2024 18:48:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 546586B0085; Tue, 30 Jul 2024 18:48:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 40E386B0089; Tue, 30 Jul 2024 18:48:09 -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 19FC26B007B for ; Tue, 30 Jul 2024 18:48:09 -0400 (EDT) Received: from smtpin28.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id BE9E5A013A for ; Tue, 30 Jul 2024 22:48:08 +0000 (UTC) X-FDA: 82397908656.28.4B6918E Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by imf01.hostedemail.com (Postfix) with ESMTP id BE83040012 for ; Tue, 30 Jul 2024 22:48:06 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=B6t53Oel; spf=pass (imf01.hostedemail.com: domain of dakr@kernel.org designates 145.40.73.55 as permitted sender) smtp.mailfrom=dakr@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1722379644; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=uiKfXUJ4f0yo25v8h/c+Bl4ewiq66og1X/4BWhUE2Dg=; b=oWm/aQ0aZa4+Bfi2WSxt3P2WJn16UN4vAb+VqeiSl4ngQFAKwyO+XidXy6R9aWcLm+8PB4 MBK2FBZzz0CXgbN9SShhx0aHQKPBPVEDOVWa8vS/72e5woU+dsWqF9ZPdcb9xjXXAQlpEV NWQEORnx8a2SvDO/EjBd9gstV+ktVkQ= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=B6t53Oel; spf=pass (imf01.hostedemail.com: domain of dakr@kernel.org designates 145.40.73.55 as permitted sender) smtp.mailfrom=dakr@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1722379644; a=rsa-sha256; cv=none; b=wWKrLyNWLPgKcSxf1wBWEzWjT3tlWNAT9b6zGtlbDCWGWfhEAZbQUxBONMy8WPTbLfVbLK WfW9URYPUZ4OOMrYi9FmSQ74wCk4isrxSf0kOSJ7zzYoD6L5LyeUUh9WZcr4YR+dbVHxzB I7qVomn1ebpWygTNPZADfNQyRBH4Xf4= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 363EACE0E30; Tue, 30 Jul 2024 22:48:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1A46C32782; Tue, 30 Jul 2024 22:48:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722379683; bh=WNxTFcwd+P8aGMCFG3m0x18YYSZtwqBSZQ2LZ+l/IOI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B6t53OelgE1TtEQQOFEh3zyoFoGfxUt0+CWt0Ag+hSW3vorO0mk5V5ahqQexHbwqZ DMp4PohERmoaEQ06Kmtv3nYZunlpz0syNLW0qsXHna9RdNGHZgcMQjAjGid/ag/0UD Tj5DHIF/AXcvzj2GaJXNwLfE82AY5P7ev3IUv0plq5l2OcbpCwViYDFvhfyqxrZ7da VGSiIt8NT9FhAI8USMAY98y45uw+egttlUOnZ9L82LIZkciVHFxN4pED1DHNZMMxMO IXcvR3I1OdW9ywaymHOMe9FR47I423ylw7NAgh0vWsizk6wYWSJ2fCeGzpX/qX5Fxh qKJS69r7RwN6w== Date: Wed, 31 Jul 2024 00:47:59 +0200 From: Danilo Krummrich To: Andrew Morton Cc: urezki@gmail.com, hch@infradead.org, vbabka@suse.cz, mhocko@suse.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 1/4] mm: kvrealloc: disable KASAN when switching to vmalloc Message-ID: References: <20240730185049.6244-1-dakr@kernel.org> <20240730185049.6244-2-dakr@kernel.org> <20240730141508.2da2194a2faacfabb6030c18@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240730141508.2da2194a2faacfabb6030c18@linux-foundation.org> X-Stat-Signature: 53jt7yi54zbazhewmcrs9echyafrqdw5 X-Rspam-User: X-Rspamd-Queue-Id: BE83040012 X-Rspamd-Server: rspam02 X-HE-Tag: 1722379686-460078 X-HE-Meta: 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 3ooL7YHm g+ZW2I6iY9sdY/hyQKfXThQpVBVfOirEuKFpiZytL9Vy8GPu1KMogmc7S+0I5G8qI1L+/rEDMfdbX5CG+LtM4cfDGn2JSu6yx+7GWRFGKWRScKuQcpDs90qj2ltLlxY5yA7J6vC7pfJULPecVqVYjznoI6qjpUUqOGcv82yaofacj5DkS/k1xybx1oW4/Jp3jyVQWwYuzN9o9+5NV6qbYfgfZh0kbFpG0olFKfY0H6mMbBak= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000653, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Jul 30, 2024 at 02:15:08PM -0700, Andrew Morton wrote: > On Tue, 30 Jul 2024 20:49:41 +0200 Danilo Krummrich wrote: > > > Disable KASAN accessibility checks when switching from a kmalloc buffer > > to a vmalloc buffer. > > This text tells us "what", which was utterly evident from a cursory > read of the code. > > Please tell us the "why". Completely. As mentioned in the other reply. Since this is a fixup series for stuff that's in mm-unstable already, and hence gets squashed in later on, I treated this more like the list of changes one would also append when sending the next version of a series. If you expect such fixup commits to have the same detail than regular ones, I'll surely add those details and resend. Please let me know. > > > Fixes: 923a26b4c679 ("mm: kvmalloc: align kvrealloc() with krealloc()") > > For those who are following along, this patch in mm-unstable so this > patch will be squished into the above. >