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=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 8C60EC33CAF for ; Thu, 16 Jan 2020 19:02:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B56621582 for ; Thu, 16 Jan 2020 19:02:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579201337; bh=A6Z7jOfd+OQTDKe1kq58OeNgsQqWUkVXWSp8srLhlIk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=N6dgGWXk+2D1E+ZBh6ydKSZgb8KyogNnIEWuXAn0ghNv4qwiT5bKDkPM5Kig3jrdy Ssynkw842KypYAqPV6J59Sos0J/P2MjbD+7GKL/qYjxtdFTzpHEsLZrS8AYm69eUEn /W83ePV2TG3CcJZa2hCYCcIDIwpOjc4aXVTwbewk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388686AbgAPRFm (ORCPT ); Thu, 16 Jan 2020 12:05:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:34246 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388720AbgAPRF3 (ORCPT ); Thu, 16 Jan 2020 12:05:29 -0500 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 A03E72077B; Thu, 16 Jan 2020 17:05:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579194328; bh=A6Z7jOfd+OQTDKe1kq58OeNgsQqWUkVXWSp8srLhlIk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PzlqwGPB7jsNwvb30iPS+PEdmVSY0tLg/JxV9pvMNgpx6XGtj3oghgDvRhWfrNjM5 Auxk6GyzZ9E9+KTK0in3e3IhMghzUv3NKXEVqfzaWIEfVeoxOKT1ctIMNqkUubWl41 FeUX6Cox+5sET37hnvmBFRppgQh2NUSQJxR+RMRA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Matteo Croce , Mark Rutland , Will Deacon , Sasha Levin , linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 4.19 276/671] arm64/vdso: don't leak kernel addresses Date: Thu, 16 Jan 2020 11:58:34 -0500 Message-Id: <20200116170509.12787-13-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200116170509.12787-1-sashal@kernel.org> References: <20200116170509.12787-1-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: Matteo Croce [ Upstream commit 0f1bf7e39822476b2f921435cf990f67a61f5f92 ] Since commit ad67b74d2469d9b8 ("printk: hash addresses printed with %p"), two obfuscated kernel pointer are printed at every boot: vdso: 2 pages (1 code @ (____ptrval____), 1 data @ (____ptrval____)) Remove the the print completely, as it's useless without the addresses. Fixes: ad67b74d2469d9b8 ("printk: hash addresses printed with %p") Acked-by: Mark Rutland Signed-off-by: Matteo Croce Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/kernel/vdso.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index ec0bb588d755..42b7082029e1 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -146,8 +146,6 @@ static int __init vdso_init(void) } vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT; - pr_info("vdso: %ld pages (%ld code @ %p, %ld data @ %p)\n", - vdso_pages + 1, vdso_pages, vdso_start, 1L, vdso_data); /* Allocate the vDSO pagelist, plus a page for the data. */ vdso_pagelist = kcalloc(vdso_pages + 1, sizeof(struct page *), -- 2.20.1