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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BEA9C4332F for ; Wed, 2 Nov 2022 03:31:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231189AbiKBDbQ (ORCPT ); Tue, 1 Nov 2022 23:31:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48648 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231202AbiKBDau (ORCPT ); Tue, 1 Nov 2022 23:30:50 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 523D426124 for ; Tue, 1 Nov 2022 20:30:49 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id E43D2617CB for ; Wed, 2 Nov 2022 03:30:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32795C433C1; Wed, 2 Nov 2022 03:30:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667359848; bh=o3ul81xlbU7SfZ940BORU45iablF88domflPPQUj274=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r/JRYJiTZD1Vjvt20uXqPaSYOsw5nCGqy+Fq/B+vr4EXB3aYaHRHsDpIMwqCk2RYG sdahttON1U3e0Lbp6ZKxYYG650Iqfi61/mT2nob2CiSzdFHGKHUP5LS+e3DNv65Lki zQF1LZv1ewqOJzF+bk8g62hMzh7mm1GuhSBKj8Wo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lu Baolu , Joerg Roedel , Will Deacon , Robin Murphy , Jerry Snitselaar , Joerg Roedel , Sasha Levin Subject: [PATCH 4.19 20/78] iommu/vt-d: Clean up si_domain in the init_dmars() error path Date: Wed, 2 Nov 2022 03:34:05 +0100 Message-Id: <20221102022053.570432798@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221102022052.895556444@linuxfoundation.org> References: <20221102022052.895556444@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jerry Snitselaar [ Upstream commit 620bf9f981365c18cc2766c53d92bf8131c63f32 ] A splat from kmem_cache_destroy() was seen with a kernel prior to commit ee2653bbe89d ("iommu/vt-d: Remove domain and devinfo mempool") when there was a failure in init_dmars(), because the iommu_domain cache still had objects. While the mempool code is now gone, there still is a leak of the si_domain memory if init_dmars() fails. So clean up si_domain in the init_dmars() error path. Cc: Lu Baolu Cc: Joerg Roedel Cc: Will Deacon Cc: Robin Murphy Fixes: 86080ccc223a ("iommu/vt-d: Allocate si_domain in init_dmars()") Signed-off-by: Jerry Snitselaar Link: https://lore.kernel.org/r/20221010144842.308890-1-jsnitsel@redhat.com Signed-off-by: Lu Baolu Signed-off-by: Joerg Roedel Signed-off-by: Sasha Levin --- drivers/iommu/intel-iommu.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2800,6 +2800,7 @@ static int __init si_domain_init(int hw) if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { domain_exit(si_domain); + si_domain = NULL; return -EFAULT; } @@ -3502,6 +3503,10 @@ free_iommu: disable_dmar_iommu(iommu); free_dmar_iommu(iommu); } + if (si_domain) { + domain_exit(si_domain); + si_domain = NULL; + } kfree(g_iommus);