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 6C188C3ABAC for ; Tue, 6 May 2025 13:40:51 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DB9BB6B0088; Tue, 6 May 2025 09:40:48 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D67726B0099; Tue, 6 May 2025 09:40:48 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C5A626B009A; Tue, 6 May 2025 09:40:48 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id A90956B0088 for ; Tue, 6 May 2025 09:40:48 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 4F27BC0280 for ; Tue, 6 May 2025 13:40:50 +0000 (UTC) X-FDA: 83412593460.10.560B0BF Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf26.hostedemail.com (Postfix) with ESMTP id 8B501140014 for ; Tue, 6 May 2025 13:40:48 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b="CA/BBRAB"; spf=pass (imf26.hostedemail.com: domain of broonie@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=broonie@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=1746538848; 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=TnsMB6oXDTL83dZ5GGXgMLoaKxr/HvwUPrxb2FLg/nk=; b=T53LHOvg0ZIs2hndK4h9YVf155VTU0hWcX5GK2EKcXJPPKt6A9SzKHWaBI+3493RqImKHh 7FZxY+iXWBxGl7CgWcygrIwFMlRG372ulWHFKpkIovbwKahjW+JQvgDmYbRIVVGSRskquJ sqzao5emZm/VaIQpu7akjYBakVB/oAs= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b="CA/BBRAB"; spf=pass (imf26.hostedemail.com: domain of broonie@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=broonie@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1746538848; a=rsa-sha256; cv=none; b=KqkpRO5vXzTDEBYXB+lz2daM1FIhSdLkzyCcPPkuG/VYVqGoyxRw0gdz3kfcUJnWa4IyPh x67vYXV3ZYw+QQ5L8dUbkiku/KFjUpfZwXENFWEP8GrTLCw6950kM8eq9I8SXf4SbVUghg imObCpJV2ZkHFdBRfB8np7Aou4lztzw= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 461AE5C4B7E; Tue, 6 May 2025 13:38:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C7FCAC4CEE4; Tue, 6 May 2025 13:40:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746538847; bh=TnsMB6oXDTL83dZ5GGXgMLoaKxr/HvwUPrxb2FLg/nk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=CA/BBRABGSCouOyN2s3DHXWxIxY8k8K6lcCeP/Bp6YFHEubJsj4q+Ki9edUoAXCWZ zr1IX+FZJgWOfUse3y1JyM5uCIRKbEB8FMrpZd3qX/WEyfo9aYc2fA0QpPom8A2/hX Hjdhjx7Z1lrRpTvQXnokDcwF1QxPyMCNBF8Y1jd4OV5u1i6o/CHZDyJuX7Hoe2i6Vl f25johlq2LtiUN49ATle/TkFnWqP0PtEgxE7lDsBlqf/6//yxZHX9LHcG+StQonmjh H9WvZDxG7uIY2cU+51vrXsqkbGDhMkaQSxMoEndxI1wGaAkaf/r2X+rcYb/JPP5OJG PjeRWevC2sVYQ== Date: Tue, 6 May 2025 22:40:41 +0900 From: Mark Brown To: Florent Revest Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, akpm@linux-foundation.org, thiago.bauermann@linaro.org, jackmanb@google.com, stable@vger.kernel.org Subject: Re: [PATCH 1/4] mm: fix VM_UFFD_MINOR == VM_SHADOW_STACK on USERFAULTFD=y && ARM64_GCS=y Message-ID: References: <20250506095224.176085-1-revest@chromium.org> <20250506095224.176085-2-revest@chromium.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="x2jWddA5IH0klT0O" Content-Disposition: inline In-Reply-To: <20250506095224.176085-2-revest@chromium.org> X-Cookie: Well begun is half done. X-Stat-Signature: 7p89f3tg7x8ic3tb1ezqpjfyskhtexrz X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 8B501140014 X-Rspam-User: X-HE-Tag: 1746538848-42997 X-HE-Meta: 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 MAutw96K FTOsxh42peKWbPoDAYuSz5FipW03u2V0O539i66v8relJ3AuW1DBL1x5qWpEUZBMzfiOmZQyVX+RI0bCtFU38hZQd+yyrDL/rm7R7Rf5QFXXPwv+xwVIssL4MJ6Sgt+2qVjvSPm3TENPTt9liYHObEzXhUwxtEySGNymF6fCDOfQ4O7q8maEDNHKwiJA1hUyuqhTDwSIVI2/7Ip8c3mKTKm+qWBuSPuu3es/ZwEWUpLodKJHtc9WnvIJkG37hySXP3X+srp4T0hqIMVHxAB+nSE5l8FmkQYmMKf+HYnfLNQVOWEgqoDU6QaVVkIsokC3thNBrccfli2uFhTu1cVWw5+thfwp1kgTULDg+dfsrBTmC5KJxIUd1dU4h1nl5KvwA3jQh 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: List-Subscribe: List-Unsubscribe: --x2jWddA5IH0klT0O Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, May 06, 2025 at 11:52:21AM +0200, Florent Revest wrote: > On configs with CONFIG_ARM64_GCS=y, VM_SHADOW_STACK is bit 38. > On configs with CONFIG_HAVE_ARCH_USERFAULTFD_MINOR=y (selected by > CONFIG_ARM64 when CONFIG_USERFAULTFD=y), VM_UFFD_MINOR is _also_ bit 38. Reviewed-by: Mark Brown --x2jWddA5IH0klT0O Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmgaEVkACgkQJNaLcl1U h9DNhQf+Od2vOQsm8ZSTF5BxQFaQvck4UfZc2SRgJP4yUv++XNZmdwyXQ3L5+JiS EQiK3uPOGueSO5nt3GBaP4Jmh6Ii1a2kLENKY5dpGf1Gp7cwvyJbVD6wSeoBX3Q8 rHZvWoaDzvHS6xsmGpLfNKN6CcS9w8HR4t0g4em1pDeJCyo0CgF46fZE3ljtarcU VPrWEPGWqeccT5PfP5EexnEhR5ChJXLS9Gx8q36mIJivayq3mbwkvCTnPOKnNXxy l04gz3JAWDhZ9hvw+64iVK/FtcO7c4BGKfDyij1RZ8W15RJpRwHcy9aCNcQ0oRqd UyYKkkjph35w5vBvN4Cg49RoFXNGnA== =f8rh -----END PGP SIGNATURE----- --x2jWddA5IH0klT0O--