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 5BEA11C57B1; Tue, 15 Oct 2024 12:04:09 +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=1728993849; cv=none; b=SKBHFUddrJgbkOyjzx4BmV3eTfwwAVykBY6RbhVpjNlc+Ea7Ohy9t4yrfNxNFu2ljkkH4n1xADwn9D0JYR5i2TrJI4xEet8nu6uGmT8hznqTUHt6eZryCDoni59HdKW3C75mAvZ+eXQ9EQ+CTYfcPFH7Tdk9LlH9EcloQToCmgU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728993849; c=relaxed/simple; bh=kaLDUmZzMagFBeSWL2mOoeFjvVQdglBceOQsqDkfebE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lg8rha2qE64QZqgUyyxE9LdnX1gDwQ+Qnv8HtvqOEmAjpzU2YcZMBWOFqnHo2K9UkzoifgL8fSF4x79u8qmaiSI3KE1HEzEvpfqxQzG/pxftabDfWtw1aYvE1A5ryJ//u+x+JCwk3tNq9FJP2e5g+bE4A+CWpAd56poJCxdcw9k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=AKxZCNC2; 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="AKxZCNC2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D48EBC4CEC6; Tue, 15 Oct 2024 12:04:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728993849; bh=kaLDUmZzMagFBeSWL2mOoeFjvVQdglBceOQsqDkfebE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AKxZCNC2C1t4zwycdbjQ2JxN5TiZrIsOrR3GRTNP/aye+dd4bzm9yFAKKkOsTwqPg jvgu7wzaY6DlDhajNHutPJSR0vM5f1ZoiXjjhh/vNd+zuGCtRaib2WmxTavvmzM7r2 aUO3zHAkY1i7B49xuVYsr1Ex+LFn+EbnjVDaCbrk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jisheng Zhang , Palmer Dabbelt Subject: [PATCH 5.15 517/691] riscv: define ILLEGAL_POINTER_VALUE for 64bit Date: Tue, 15 Oct 2024 13:27:45 +0200 Message-ID: <20241015112500.864994256@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241015112440.309539031@linuxfoundation.org> References: <20241015112440.309539031@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 5.15-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 @@ -210,6 +210,11 @@ 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 3 if 64BIT