From patchwork Tue Mar 2 02:32:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 392610 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,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 75406C4332B for ; Wed, 3 Mar 2021 00:12:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 51E5864FC4 for ; Wed, 3 Mar 2021 00:12:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232016AbhCCAAQ (ORCPT ); Tue, 2 Mar 2021 19:00:16 -0500 Received: from mail.kernel.org ([198.145.29.99]:54116 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241819AbhCBCdt (ORCPT ); Mon, 1 Mar 2021 21:33:49 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id A3D9B64D9C; Tue, 2 Mar 2021 02:33:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1614652389; bh=2/sTuEpFwd93bBqjR0EAjn1gZBYjn5jEVQYV6u7dFpA=; h=From:To:Cc:Subject:Date:From; b=rD1yibcbaSMszD1yM2dmQRNfJ4p5XqppStQyE7CxzroWtmN8S85IOT+fP6srcl+6x dWos1wnPmF9m0OF6eKaZiPV6sY8Q7vjSql7tNzhn5XF90+9oYQ3QahBnW4pEvY31Yi xlGsntppQDTmgfBXoa8Xr65I6PFwUq7TAdi61ST+7IzT5VxJT0aYA3I7JciaG3/2Ek 7zyUyQWeexcpo6QP64YJJ4rvEPMKlWHJ2AL8drC2tEMyygMwr/JcW7bFuuLuiO8NwW BZpSSa6SHj2KAUv6EmyyPGRVlzvAVhICezyuQ/pVbzeFjgu8kcTk6PGuecugbutSj8 +ZYNikt0cSZfQ== From: Jarkko Sakkinen To: linux-sgx@vger.kernel.org Cc: Jarkko Sakkinen , stable@vger.kernel.org, Dave Hansen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , Serge Ayoun , Sean Christopherson , Jethro Beekman , linux-kernel@vger.kernel.org Subject: [PATCH] x86/sgx: Fix a resource leak in sgx_init() Date: Tue, 2 Mar 2021 04:32:42 +0200 Message-Id: <20210302023242.112285-1-jarkko@kernel.org> X-Mailer: git-send-email 2.30.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org If sgx_page_cache_init() fails in the middle, a trivial return statement causes unused memory and virtual address space reserved for the EPC section, not freed. Fix this by using the same rollback, as when sgx_page_reclaimer_init() fails. Cc: stable@vger.kernel.org # 5.11 Fixes: e7e0545299d8 ("x86/sgx: Initialize metadata for Enclave Page Cache (EPC) sections") Signed-off-by: Jarkko Sakkinen --- arch/x86/kernel/cpu/sgx/main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c index 8df81a3ed945..52d070fb4c9a 100644 --- a/arch/x86/kernel/cpu/sgx/main.c +++ b/arch/x86/kernel/cpu/sgx/main.c @@ -708,8 +708,10 @@ static int __init sgx_init(void) if (!cpu_feature_enabled(X86_FEATURE_SGX)) return -ENODEV; - if (!sgx_page_cache_init()) - return -ENOMEM; + if (!sgx_page_cache_init()) { + ret = -ENOMEM; + goto err_page_cache; + } if (!sgx_page_reclaimer_init()) { ret = -ENOMEM;