From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9B2452030A for ; Wed, 31 Dec 2025 03:01:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767150085; cv=none; b=mYxQtBYEjSjrwqXol0pJxHlAqq9fgmCc9hnMHeQ6L8egLVpYfLFautGzuMLkWtAk3kMNZnsyuclWbasMygfae1TXNy3Xa0H+VVfkGO+8NU+WZbfUbyAKuNWh1hnFfuP6j5M099UwZl9JRXhxyhLHDt7LnWNMa/d89g1inDWmLbM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767150085; c=relaxed/simple; bh=Q2+Rt8W61CA9DfQnOvcn73GgeeG4biAzPEGsgWhR4ko=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References: MIME-Version:Content-Type; b=sm5zfOyiyyQg4ItQpoQVFSLB0qMwg+lOuTIs5PE3bjE0yO+peoj/1Yr8IqYk4bq0r0QKH31ng+fbTct/kbkG0zKjlm9B9/BhOCYrZPmq1vyRyQlm4EUwRJcJ2hkQ+lPkYnFrbzz+kanfZbgFeo2XN4I/oSdLoHtfgHD9oSEEjVs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RSWmi1fq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RSWmi1fq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51EA4C116C6; Wed, 31 Dec 2025 03:01:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767150085; bh=Q2+Rt8W61CA9DfQnOvcn73GgeeG4biAzPEGsgWhR4ko=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=RSWmi1fquDi6fA20tELdQkP1lOKT4KonhKTiaR39WPycrE6efi9VAMZ7aXCjBmRsn M9D51EWeAC5PFewmfYcRQK04TitdhWL40pA/TAtbMK350gmvuwVR4xUsETIXifQmxE pRWfPxhSEr1PK0zi3XuWV0j3AST1eNQ0ia8CPEIfJXDNyiosbLEsEVva3jGXWRmgJY JDSgBTyT/osNrRtl4sc23wRDPPSz6yl9evPQ4UjphKCUrsMvM0vnIurYL9wGzqp+VZ Bg+LCKvqdPQOF0oeXmEpJb2J/XH2UMivVWij/Lzr91BjckG0kwXYTu6T2CZxTLqCYI nu/50mnZoMCHQ== Date: Tue, 30 Dec 2025 20:01:20 -0700 (MST) From: Paul Walmsley To: Lukas Gerlach cc: linux-riscv@lists.infradead.org, palmer@dabbelt.com, pjw@kernel.org, aou@eecs.berkeley.edu, alex@ghiti.fr, linux-kernel@vger.kernel.org, daniel.weber@cispa.de, michael.schwarz@cispa.de, marton.bognar@kuleuven.be, jo.vanbulck@kuleuven.be Subject: Re: [PATCH 2/2] riscv: Sanitize syscall table indexing under speculation In-Reply-To: <20251218191332.35849-3-lukas.gerlach@cispa.de> Message-ID: References: <20251218191332.35849-1-lukas.gerlach@cispa.de> <20251218191332.35849-3-lukas.gerlach@cispa.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Thu, 18 Dec 2025, Lukas Gerlach wrote: > The syscall number is a user-controlled value used to index into the > syscall table. Use array_index_nospec() to clamp this value after the > bounds check to prevent speculative out-of-bounds access and subsequent > data leakage via cache side channels. > > Signed-off-by: Lukas Gerlach Thanks, queued for v6.19-rc. - Paul