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 1F2C71E0DFE; Tue, 8 Oct 2024 13:23:48 +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=1728393829; cv=none; b=AIh8P8lsndLK9gTWz0xozD5E/kkAZ0oIBDf/DlVPUK+co8q58Sj0ulToQ+TGcIi8ytl/k0X8rScGfYQShr1nhUOnxIDuwSfESWoL+4PMvcJmv/rMxjazEV2VSdtnnm7/YqJJXRj1bpoKO+n4X9HzqnKharUX5Lr+u/0Q8lYrp18= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728393829; c=relaxed/simple; bh=VI+JN1XYTgd+rFKLLWgcU7w6xx2kACg63qiUsH4iClU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HldX6wt4qx5PKl+339Nsh/biAewZrJEuVuJgUET0T72HHWpSCQk4z+MjKaXHbQkZrijxGNkmIo1P8q3Fc51gMOm6kl1Qc7Gpd/0uVtaPy78IT0xR1cHRqtYjQ16q2UJw4rOv/OA4Nl7afe03w+KhXs3rTiYyrX+/GHC7bsyv5vk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QYHfRFko; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="QYHfRFko" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC6BBC4CECC; Tue, 8 Oct 2024 13:23:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728393828; bh=VI+JN1XYTgd+rFKLLWgcU7w6xx2kACg63qiUsH4iClU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QYHfRFkoIEs7L8I0/ZyCfP4RFiC346V0Sr+0qEg8mjIzjh/dXKPn2EAehKzVQ8uRU PWFOUbY6Hsoue82RuSqF2vh6OSsW+tHKQ2WjczHXaihzWpjqpMsf86F/2zN3bhqtzq Tt/RAjQTDdR5dMpDHlR+nmkXyvTrcLxQpE3qi1Mo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jisheng Zhang , Palmer Dabbelt Subject: [PATCH 6.6 268/386] riscv: define ILLEGAL_POINTER_VALUE for 64bit Date: Tue, 8 Oct 2024 14:08:33 +0200 Message-ID: <20241008115639.937930116@linuxfoundation.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241008115629.309157387@linuxfoundation.org> References: <20241008115629.309157387@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jisheng Zhang commit 5c178472af247c7b50f962495bb7462ba453b9fb upstream. This is used in poison.h for poison pointer offset. Based on current SV39, SV48 and SV57 vm layout, 0xdead000000000000 is a proper value that is not mappable, this can avoid potentially turning an oops to an expolit. Signed-off-by: Jisheng Zhang Fixes: fbe934d69eb7 ("RISC-V: Build Infrastructure") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20240705170210.3236-1-jszhang@kernel.org Signed-off-by: Palmer Dabbelt Signed-off-by: Greg Kroah-Hartman --- arch/riscv/Kconfig | 5 +++++ 1 file changed, 5 insertions(+) --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -259,6 +259,11 @@ config GENERIC_HWEIGHT config FIX_EARLYCON_MEM def_bool MMU +config ILLEGAL_POINTER_VALUE + hex + default 0 if 32BIT + default 0xdead000000000000 if 64BIT + config PGTABLE_LEVELS int default 5 if 64BIT