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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 72C7FC33CB6 for ; Thu, 16 Jan 2020 17:34:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1BC44246A3 for ; Thu, 16 Jan 2020 17:34:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="aoXdlwZc"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="gM1FOUx3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1BC44246A3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=dtpwzvTnCl+MJqLwf3Ch6fUTR1OQ+hGnralm6DcG+Ok=; b=aoXdlwZcLvrdzu ELpej2AG9Jnjo+8YSqjD2hajvRDrjRD49D8tTFtPYvELBCd0oKcGOIthOeHLaO78Q3fcheus6E/bN D85DPmnf7yK5Aw5HqyTMU2XYY6GsJwp17c2JK/SPeztqloUPEJwwpQTlBDRG1zhJlSqBBcEYxi1IS Rqm11A/vzRCgtod+H27q+kka96CejonbI/vvrPLb+Jiiq+djubjd3TgRnejlF4/aXEkbFM9Fqnuiw NScnPhQs4tfgnd5uyNXxWj4u6agdQdgQjJF12tbgNRVeGRfxOCN3aS2n3JSiMsrVCQpnLvagbOr3E 4XjwBYMdjypSm+FOOzhg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1is92K-0003gz-UT; Thu, 16 Jan 2020 17:34:28 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1is8fU-0004JF-NE for linux-arm-kernel@lists.infradead.org; Thu, 16 Jan 2020 17:11:00 +0000 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 3D26924681; Thu, 16 Jan 2020 17:10:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579194652; bh=kd2oORSfcd0NFsaqVRs4srB+IOVU7V1SjKKyE1YnOWY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gM1FOUx3BwXl90dW6e7FwhjZs6MbeSjaSonbnI8JyP1+GsuelvsP3p2M6vx4zzWBD wVhL9oBcdN1sbrI4zqP0rYfcfQivarRuKliIJKXbuwjZ4GSRo9gimdSeIciVcUUlAX bE0HQrEGZsobWEvS2Bpt11sgfEidSnGGfw1MtI4M= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 506/671] ARM: 8896/1: VDSO: Don't leak kernel addresses Date: Thu, 16 Jan 2020 12:02:24 -0500 Message-Id: <20200116170509.12787-243-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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200116_091052_884011_ED509BB4 X-CRM114-Status: UNSURE ( 9.66 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , Russell King , Geert Uytterhoeven , linux-arm-kernel@lists.infradead.org, Geert Uytterhoeven Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Geert Uytterhoeven [ Upstream commit 3e07590e7248db951fed6a2039403b5a39010be7 ] Since commit ad67b74d2469d9b8 ("printk: hash addresses printed with %p"), an obfuscated kernel pointer is printed at every boot if debugging is enabled: vdso: 1 text pages at base (____ptrval____) Remove the print completely, as it's useless without the address. Based on commit 0f1bf7e39822476b ("arm64/vdso: don't leak kernel addresses"). Fixes: ad67b74d2469d9b8 ("printk: hash addresses printed with %p") Signed-off-by: Geert Uytterhoeven Signed-off-by: Russell King Signed-off-by: Sasha Levin --- arch/arm/kernel/vdso.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm/kernel/vdso.c b/arch/arm/kernel/vdso.c index f4dd7f9663c1..e8cda5e02b4e 100644 --- a/arch/arm/kernel/vdso.c +++ b/arch/arm/kernel/vdso.c @@ -205,7 +205,6 @@ static int __init vdso_init(void) } text_pages = (vdso_end - vdso_start) >> PAGE_SHIFT; - pr_debug("vdso: %i text pages at base %p\n", text_pages, vdso_start); /* Allocate the VDSO text pagelist */ vdso_text_pagelist = kcalloc(text_pages, sizeof(struct page *), -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel