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=-10.1 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,USER_AGENT_GIT autolearn=ham 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 CC12DC433E0 for ; Mon, 8 Jun 2020 23:38:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA73720884 for ; Mon, 8 Jun 2020 23:38:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591659502; bh=O8IWCH0+m0cboLHYQfjEKVL7l4XdRgeHAKtk8lol+os=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qJXH+0Zc+L+RrgtwhyjFbhbk2q8etjw0iJ7jI6kbj3mXavhPs4k2BXvsIo5TFMrmb +cUzr2CoxC+M5a2umEOpjMLmJb56hHz7WA2ua0+4JBnSF7dIpWKyj0tYPy5NEW4w3n Gm6E47wrtTCDNy5lt1UxcBbEw+EX1ZJKwgWwBa1U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732060AbgFHXiV (ORCPT ); Mon, 8 Jun 2020 19:38:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:58030 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387750AbgFHX23 (ORCPT ); Mon, 8 Jun 2020 19:28:29 -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 1767D20853; Mon, 8 Jun 2020 23:28:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658908; bh=O8IWCH0+m0cboLHYQfjEKVL7l4XdRgeHAKtk8lol+os=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WcxGmjX0rp4dI3fXjvthygaTjwmFo2H0DTljS6KERvhMLBaBN2UCvZcThoXeCyook kioM/lojLhUZ/Qx2Zs4BbaMIVbHZXtLirBXDFE09gAtro1Y9gQH2GE4RmgP0ngEUKU Kb9vPbEylNA8kYFeY+AwBr7FMwanQXmTiVhGAGsg= 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 4.4 28/37] x86/mm: Stop printing BRK addresses Date: Mon, 8 Jun 2020 19:27:40 -0400 Message-Id: <20200608232750.3370747-28-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608232750.3370747-1-sashal@kernel.org> References: <20200608232750.3370747-1-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 f00eb52c16a6..17eb564901ca 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -109,8 +109,6 @@ __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