From patchwork Sun May 16 03:04:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Qiang X-Patchwork-Id: 12260135 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 D5632C43460 for ; Sun, 16 May 2021 03:05:59 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 4B54E61264 for ; Sun, 16 May 2021 03:05:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4B54E61264 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=163.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:55592 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1li76M-0003Wf-68 for qemu-devel@archiver.kernel.org; Sat, 15 May 2021 23:05:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45762) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1li74p-0000pN-Qx for qemu-devel@nongnu.org; Sat, 15 May 2021 23:04:23 -0400 Received: from m12-13.163.com ([220.181.12.13]:52132) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1li74k-0002dJ-U8 for qemu-devel@nongnu.org; Sat, 15 May 2021 23:04:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=BzYCD 09ffMe45pwQvIaWImz53+dVi8gD6dIwEE++i/w=; b=jpCYDOB6wxrLE5Q4hv6nQ sGnRnZq0em23rFKL3ZxjWXMUbNdu4UL3XThMGr6PXLw0YZ9O357zTyPAgBKgpC5V w4mt6GzsgUbYz/Y4rHwvFf+JNxHG8yosgEWIJVWoUH8ok9H1ukeAMQbqh9F2pUUQ 1HPs/zh3RMhVNo94aDsOSk= Received: from ubuntu.localdomain (unknown [115.200.200.157]) by smtp9 (Coremail) with SMTP id DcCowAC3evili6Bg85SBAw--.61303S9; Sun, 16 May 2021 11:04:13 +0800 (CST) From: Li Qiang To: marcandre.lureau@redhat.com, kraxel@redhat.com, philmd@redhat.com, ppandit@redhat.com, mcascell@redhat.com, qemu-devel@nongnu.org Subject: [PATCH v2 5/8] vhost-user-gpu: fix memory leak in 'virgl_cmd_resource_unref' (CVE-2021-3544) Date: Sat, 15 May 2021 20:04:00 -0700 Message-Id: <20210516030403.107723-6-liq3ea@163.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210516030403.107723-1-liq3ea@163.com> References: <20210516030403.107723-1-liq3ea@163.com> MIME-Version: 1.0 X-CM-TRANSID: DcCowAC3evili6Bg85SBAw--.61303S9 X-Coremail-Antispam: 1Uf129KBjvdXoW7Wr1DXF1UGFW3Xw4rWFW3Jrb_yoWkGFg_ZF 4YkF18Ar45GFy093y5Zw1rAayaywna9FyqvFyfKa4Fk34rWr1jqw10q3s7Gry29r4kGF4D JryFyw4rCw4a9jkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IU85CzJUUUUU== X-Originating-IP: [115.200.200.157] X-CM-SenderInfo: 5oltjvrd6rljoofrz/xtbBZgyUbVaD74ALNQABsW Received-SPF: pass client-ip=220.181.12.13; envelope-from=liq3ea@163.com; helo=m12-13.163.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Li Qiang , liq3ea@gmail.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The 'res->iov' will be leaked if the guest trigger following sequences: virgl_cmd_create_resource_2d virgl_resource_attach_backing virgl_cmd_resource_unref This patch fixes this. Fixes: CVE-2021-3544 Reported-by: Li Qiang virtio-gpu fix: 5e8e3c4c75 ("virtio-gpu: fix resource leak in virgl_cmd_resource_unref" Signed-off-by: Li Qiang --- contrib/vhost-user-gpu/virgl.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/contrib/vhost-user-gpu/virgl.c b/contrib/vhost-user-gpu/virgl.c index 6a332d601f..c669d73a1d 100644 --- a/contrib/vhost-user-gpu/virgl.c +++ b/contrib/vhost-user-gpu/virgl.c @@ -108,9 +108,16 @@ virgl_cmd_resource_unref(VuGpu *g, struct virtio_gpu_ctrl_command *cmd) { struct virtio_gpu_resource_unref unref; + struct iovec *res_iovs = NULL; + int num_iovs = 0; VUGPU_FILL_CMD(unref); + virgl_renderer_resource_detach_iov(unref.resource_id, + &res_iovs, + &num_iovs); + g_free(res_iovs); + virgl_renderer_resource_unref(unref.resource_id); }