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 A05D2C43334 for ; Thu, 7 Jul 2022 10:33:44 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0EBFA6B0072; Thu, 7 Jul 2022 06:33:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 09AC36B0073; Thu, 7 Jul 2022 06:33:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ECAB06B0074; Thu, 7 Jul 2022 06:33:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id DF1786B0072 for ; Thu, 7 Jul 2022 06:33:43 -0400 (EDT) Received: from smtpin27.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id A6B2420641 for ; Thu, 7 Jul 2022 10:33:43 +0000 (UTC) X-FDA: 79659942726.27.D2E15B7 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf28.hostedemail.com (Postfix) with ESMTP id 393FCC005D for ; Thu, 7 Jul 2022 10:33:43 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 2DC68622B4; Thu, 7 Jul 2022 10:33:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F8CFC3411E; Thu, 7 Jul 2022 10:33:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1657190021; bh=vqA5PsbZSx9eEJPFFePmRmecKkUrKqaq0V4DY+wafWk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Qd7VSRFAlfmzlRmU/wKTWXgNuUl6sftRbuENvxdDzOqkBGQU6oOV04d7SQSECU/go xvVTnsOVMbEGz63q0uZVHDoPFvv9F401XzD2SOOldar/a7hRU8pseoqJCxsbrRgeMU XmiYNELxLWtHC1poGHT6RG/rhdQvS6fzC8227xEfHgPIdZG2gbDR3aZWKikQgnNmtM SSIlwXVhKwTAmxFjioeY63NuzhZbWpezTaShIv+ek0k3ehAT0SxcgPpXvYxTkTIohL UeJKwYHcZJP09+nD7pJGcpFxfLxff7Rh35jU64s3CmnQF5ScdCQNOF29zFFKaHMY/q xXEXvqNs3yh6Q== From: Will Deacon To: Andrey Konovalov , Andrey Ryabinin , Catalin Marinas Cc: kernel-team@android.com, Will Deacon , Peter Collingbourne , kasan-dev@googlegroups.com, Vincenzo Frascino , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org Subject: Re: [PATCH v2 0/4] kasan: Fix ordering between MTE tag colouring and page->flags Date: Thu, 7 Jul 2022 11:33:23 +0100 Message-Id: <165718731822.1443949.8673222178303126682.b4-ty@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220610152141.2148929-1-catalin.marinas@arm.com> References: <20220610152141.2148929-1-catalin.marinas@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1657190023; a=rsa-sha256; cv=none; b=L28H3CgwwqD2dZrVeY6/SCg130ua03sLIomGDTo1+AuotRU/iOHNKVqQuOB7HzmJc4qTOX ykqAGnhqc00p0CIdDzExUg3woBqndVO4bTeh/oyf6K7P5Gvp1uFzEZxXcCsrkXElXbZq+0 3mD1Hi5b3X9fivJ9xtCP1+2++JssHLY= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=Qd7VSRFA; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf28.hostedemail.com: domain of will@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=will@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1657190023; 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=thRDoE1LgHx04pp3d2de2M4bjneSix4nATvc6/hnzsU=; b=8gwaqWWaLOz+4nDS/oox/xkOstUSGk0mWGs8v/AZWIqNPxrpBNGvAQgmcl9PTkrI7K3R+2 wMLb/Su9+diIimZte+NBeGoWGyEwqne8Elnu/KX+duopif+CuChvnNARloOmisVExWUQVa VhT5zDwRKlXvkYufRwSjAFy7V4G0OEo= X-Rspamd-Server: rspam04 X-Rspam-User: Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=Qd7VSRFA; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf28.hostedemail.com: domain of will@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=will@kernel.org X-Stat-Signature: 537wyz1sw7fmgymmaw98jwriru3pryrp X-Rspamd-Queue-Id: 393FCC005D X-HE-Tag: 1657190023-172009 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, 10 Jun 2022 16:21:37 +0100, Catalin Marinas wrote: > That's a second attempt on fixing the race race between setting the > allocation (in-memory) tags in a page and the corresponding logical tag > in page->flags. Initial version here: > > https://lore.kernel.org/r/20220517180945.756303-1-catalin.marinas@arm.com > > This new series does not introduce any new GFP flags but instead always > skips unpoisoning of the user pages (we already skip the poisoning on > free). Any unpoisoned page will have the page->flags tag reset. > > [...] Applied to arm64 (for-next/mte), thanks! [1/4] mm: kasan: Ensure the tags are visible before the tag in page->flags https://git.kernel.org/arm64/c/ed0a6d1d973e [2/4] mm: kasan: Skip unpoisoning of user pages https://git.kernel.org/arm64/c/70c248aca9e7 [3/4] mm: kasan: Skip page unpoisoning only if __GFP_SKIP_KASAN_UNPOISON https://git.kernel.org/arm64/c/6d05141a3930 [4/4] arm64: kasan: Revert "arm64: mte: reset the page tag in page->flags" https://git.kernel.org/arm64/c/20794545c146 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev