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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 30BAEC76186 for ; Mon, 29 Jul 2019 20:12:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F3F84205F4 for ; Mon, 29 Jul 2019 20:12:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564431177; bh=2grPPtpcN7ie7lKnPNiZEOWkC3Pu+Pw4pycW230f21Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=1fo+MVT0RXUJjq2AaUo8t9ARTmPu+nVs+l7fZIox5YR1A2e5SXE3ED6aMXCC/d3AE rDDQVagkeqTCGSYW+UZLcUGNP7gCaINSq9NIOi7ZF898GVPU7RW+6jkep+p0KQ1vr4 omlyla+gufcqmAghiWIXQIxMOv+9usaIW58SDNMs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728931AbfG2UMw (ORCPT ); Mon, 29 Jul 2019 16:12:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:44058 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728726AbfG2TbQ (ORCPT ); Mon, 29 Jul 2019 15:31:16 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B71DB2171F; Mon, 29 Jul 2019 19:31:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564428676; bh=2grPPtpcN7ie7lKnPNiZEOWkC3Pu+Pw4pycW230f21Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jj8kcp4u+1raxyLEO6elfDqRMYQofR9Fa3p1Dx4efyFCQdqPc8/BBfh3ccW5fRZT8 el4SbIMh4LsJboQI6geCHQcgJJVR2RGZscZm6lue5lsSMgOwmXhCPPaeqNf6Lm8XyW TEx8y78WABZ9ULW9COV4tKAd1mFJgolpSXKbX7TA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Cfir Cohen , David Rientjes , Thomas Gleixner Subject: [PATCH 4.14 152/293] x86/boot: Fix memory leak in default_get_smp_config() Date: Mon, 29 Jul 2019 21:20:43 +0200 Message-Id: <20190729190836.225075240@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190729190820.321094988@linuxfoundation.org> References: <20190729190820.321094988@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: David Rientjes commit e74bd96989dd42a51a73eddb4a5510a6f5e42ac3 upstream. When default_get_smp_config() is called with early == 1 and mpf->feature1 is non-zero, mpf is leaked because the return path does not do early_memunmap(). Fix this and share a common exit routine. Fixes: 5997efb96756 ("x86/boot: Use memremap() to map the MPF and MPC data") Reported-by: Cfir Cohen Signed-off-by: David Rientjes Signed-off-by: Thomas Gleixner Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1907091942570.28240@chino.kir.corp.google.com Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/mpparse.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) --- a/arch/x86/kernel/mpparse.c +++ b/arch/x86/kernel/mpparse.c @@ -544,17 +544,15 @@ void __init default_get_smp_config(unsig * local APIC has default address */ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; - return; + goto out; } pr_info("Default MP configuration #%d\n", mpf->feature1); construct_default_ISA_mptable(mpf->feature1); } else if (mpf->physptr) { - if (check_physptr(mpf, early)) { - early_memunmap(mpf, sizeof(*mpf)); - return; - } + if (check_physptr(mpf, early)) + goto out; } else BUG(); @@ -563,7 +561,7 @@ void __init default_get_smp_config(unsig /* * Only use the first configuration found. */ - +out: early_memunmap(mpf, sizeof(*mpf)); }