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 X-Spam-Level: X-Spam-Status: No, score=-7.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9ACDC433E0 for ; Mon, 8 Jun 2020 23:42:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AF6D02068D for ; Mon, 8 Jun 2020 23:42:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591659722; bh=OSvM96E4UrNyHkxD3I4QZ1xFXLCQ9560OclVcaLVjUQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=UpF1dPwD6Y6hsME9fHa5UD5a3XI/wJ4MajEmYjh5mXCX5/JrtKgxs1AOjvSDJNW3E O/4M2zgTORPzI0wpQxNglNWerLm5is0DQsK4GpGRXgv92BOcxX714mR3PJpS5g0vmx KSyWD1zSGjDrI5MzYkL1JfXxa1DRF3W2i/1KhbWE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731289AbgFHXmB (ORCPT ); Mon, 8 Jun 2020 19:42:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:56090 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387630AbgFHX1d (ORCPT ); Mon, 8 Jun 2020 19:27:33 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 281A8207C3; Mon, 8 Jun 2020 23:27:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658852; bh=OSvM96E4UrNyHkxD3I4QZ1xFXLCQ9560OclVcaLVjUQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X7NorXec1VHcb051KDvmh/8zoBHvBBBpezxLHxPWvgYctMPacTEnxlBCHtEzXCrc0 0eSdsOfNVuOZXOWafCG/lNbd+nWds26IG3kMo5fezX9rJnxj2TQrXP7tLGbFam9vXC nHidzWq6s/H9wXrHkHP4J5MfGR+kppTSnYOtO5rw= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Arvind Sankar , Borislav Petkov , Kees Cook , Dave Hansen , Sasha Levin Subject: [PATCH AUTOSEL 4.9 39/50] x86/mm: Stop printing BRK addresses Date: Mon, 8 Jun 2020 19:26:29 -0400 Message-Id: <20200608232640.3370262-39-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608232640.3370262-1-sashal@kernel.org> References: <20200608232640.3370262-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arvind Sankar [ Upstream commit 67d631b7c05eff955ccff4139327f0f92a5117e5 ] This currently leaks kernel physical addresses into userspace. Signed-off-by: Arvind Sankar Signed-off-by: Borislav Petkov Acked-by: Kees Cook Acked-by: Dave Hansen Link: https://lkml.kernel.org/r/20200229231120.1147527-1-nivedita@alum.mit.edu Signed-off-by: Sasha Levin --- arch/x86/mm/init.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index ce092a62fc5d..bc2455c2fcab 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -110,8 +110,6 @@ __ref void *alloc_low_pages(unsigned int num) } else { pfn = pgt_buf_end; pgt_buf_end += num; - printk(KERN_DEBUG "BRK [%#010lx, %#010lx] PGTABLE\n", - pfn << PAGE_SHIFT, (pgt_buf_end << PAGE_SHIFT) - 1); } for (i = 0; i < num; i++) { -- 2.25.1