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=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 0CC47C433DF for ; Mon, 8 Jun 2020 23:53:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D2E372087E for ; Mon, 8 Jun 2020 23:53:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591660408; bh=1oK27HoEFJF1QmKyJidF9LZ7dDibAQb3VONl+MODBtY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EIDDiaWah3Uj6IlZPgvf+Z1iKIMGAZAyOkTTzCCK6CWXfYCTl0+u2vNO2EbzueILY NvqN4eQveGr4BsM4jKjgjoYfzHZsOkaC6dOJoqzTfyrXnWUGTgxwZ33UQOglAMSGvT ZWN0o4AzYOu/2hQiBhmP7+YJLN2w59QzO/ttAABo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731815AbgFHXx1 (ORCPT ); Mon, 8 Jun 2020 19:53:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:50570 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731629AbgFHXY3 (ORCPT ); Mon, 8 Jun 2020 19:24:29 -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 1714A20814; Mon, 8 Jun 2020 23:24:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658669; bh=1oK27HoEFJF1QmKyJidF9LZ7dDibAQb3VONl+MODBtY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GI/ZIFyZGBURgql/+1yEdSr8Rt/DKB9N0N+IZAbEHGIiqsOqDeQofp8niG7OwAxD+ aj9x5yP6HEGF76m4Lmt9KiBRqIHXG3U7W+9WkvAaKoCGIddKJzhX+Ie0QwUVUpufsA AHVCZR4uJx4Hfv8j7H3sBn614nQPpvMJlMUZzlSw= 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 4.19 084/106] x86/mm: Stop printing BRK addresses Date: Mon, 8 Jun 2020 19:22:16 -0400 Message-Id: <20200608232238.3368589-84-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608232238.3368589-1-sashal@kernel.org> References: <20200608232238.3368589-1-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 fb5f29c60019..b1dba0987565 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -120,8 +120,6 @@ __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