From patchwork Wed Jan 15 06:25:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pan Nengyuan X-Patchwork-Id: 11333395 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 106EE1820 for ; Wed, 15 Jan 2020 06:26:41 +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 7E754222C3 for ; Wed, 15 Jan 2020 06:26:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7E754222C3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:50078 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1irc8V-0004i6-EX for patchwork-qemu-devel@patchwork.kernel.org; Wed, 15 Jan 2020 01:26:39 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:60122) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1irc81-0004HY-1S for qemu-devel@nongnu.org; Wed, 15 Jan 2020 01:26:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1irc7x-0007iR-Aq for qemu-devel@nongnu.org; Wed, 15 Jan 2020 01:26:08 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:2732 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1irc7x-0007db-0O for qemu-devel@nongnu.org; Wed, 15 Jan 2020 01:26:05 -0500 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id CD624223B774D6192C4B; Wed, 15 Jan 2020 14:25:59 +0800 (CST) Received: from DESKTOP-9NTIQGG.china.huawei.com (10.173.221.136) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.439.0; Wed, 15 Jan 2020 14:25:52 +0800 From: To: Subject: [PATCH v2] vhost-vsock: delete vqs in vhost_vsock_unrealize to avoid memleaks Date: Wed, 15 Jan 2020 14:25:35 +0800 Message-ID: <20200115062535.50644-1-pannengyuan@huawei.com> X-Mailer: git-send-email 2.21.0.windows.1 MIME-Version: 1.0 X-Originating-IP: [10.173.221.136] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 45.249.212.191 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: Euler Robot , Pan Nengyuan , qemu-devel@nongnu.org, zhang.zhanghailiang@huawei.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Pan Nengyuan Receive/transmit/event vqs forgot to cleanup in vhost_vsock_unrealize. This patch save receive/transmit vq pointer in realize() and cleanup vqs through those vq pointers in unrealize(). The leak stack is as follow: Direct leak of 21504 byte(s) in 3 object(s) allocated from: #0 0x7f86a1356970 (/lib64/libasan.so.5+0xef970) ??:? #1 0x7f86a09aa49d (/lib64/libglib-2.0.so.0+0x5249d) ??:? #2 0x5604852f85ca (./x86_64-softmmu/qemu-system-x86_64+0x2c3e5ca) /mnt/sdb/qemu/hw/virtio/virtio.c:2333 #3 0x560485356208 (./x86_64-softmmu/qemu-system-x86_64+0x2c9c208) /mnt/sdb/qemu/hw/virtio/vhost-vsock.c:339 #4 0x560485305a17 (./x86_64-softmmu/qemu-system-x86_64+0x2c4ba17) /mnt/sdb/qemu/hw/virtio/virtio.c:3531 #5 0x5604858e6b65 (./x86_64-softmmu/qemu-system-x86_64+0x322cb65) /mnt/sdb/qemu/hw/core/qdev.c:865 #6 0x5604861e6c41 (./x86_64-softmmu/qemu-system-x86_64+0x3b2cc41) /mnt/sdb/qemu/qom/object.c:2102 Reported-by: Euler Robot Signed-off-by: Pan Nengyuan Reviewed-by: Stefano Garzarella Reviewed-by: Stefan Hajnoczi --- Changes V2 to V1: - delete virtqueues after vhost cleanup to avoid use-after-free - aslo delete virtqueues in the error path of realize() --- hw/virtio/vhost-vsock.c | 12 ++++++++++-- include/hw/virtio/vhost-vsock.h | 2 ++ 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/hw/virtio/vhost-vsock.c b/hw/virtio/vhost-vsock.c index f5744363a8..b6cee479bb 100644 --- a/hw/virtio/vhost-vsock.c +++ b/hw/virtio/vhost-vsock.c @@ -335,8 +335,10 @@ static void vhost_vsock_device_realize(DeviceState *dev, Error **errp) sizeof(struct virtio_vsock_config)); /* Receive and transmit queues belong to vhost */ - virtio_add_queue(vdev, VHOST_VSOCK_QUEUE_SIZE, vhost_vsock_handle_output); - virtio_add_queue(vdev, VHOST_VSOCK_QUEUE_SIZE, vhost_vsock_handle_output); + vsock->recv_vq = virtio_add_queue(vdev, VHOST_VSOCK_QUEUE_SIZE, + vhost_vsock_handle_output); + vsock->trans_vq = virtio_add_queue(vdev, VHOST_VSOCK_QUEUE_SIZE, + vhost_vsock_handle_output); /* The event queue belongs to QEMU */ vsock->event_vq = virtio_add_queue(vdev, VHOST_VSOCK_QUEUE_SIZE, @@ -363,6 +365,9 @@ static void vhost_vsock_device_realize(DeviceState *dev, Error **errp) err_vhost_dev: vhost_dev_cleanup(&vsock->vhost_dev); err_virtio: + virtio_delete_queue(vsock->recv_vq); + virtio_delete_queue(vsock->trans_vq); + virtio_delete_queue(vsock->event_vq); virtio_cleanup(vdev); close(vhostfd); return; @@ -379,6 +384,9 @@ static void vhost_vsock_device_unrealize(DeviceState *dev, Error **errp) vhost_vsock_set_status(vdev, 0); vhost_dev_cleanup(&vsock->vhost_dev); + virtio_delete_queue(vsock->recv_vq); + virtio_delete_queue(vsock->trans_vq); + virtio_delete_queue(vsock->event_vq); virtio_cleanup(vdev); } diff --git a/include/hw/virtio/vhost-vsock.h b/include/hw/virtio/vhost-vsock.h index d509d67c4a..bc5a988ee5 100644 --- a/include/hw/virtio/vhost-vsock.h +++ b/include/hw/virtio/vhost-vsock.h @@ -33,6 +33,8 @@ typedef struct { struct vhost_virtqueue vhost_vqs[2]; struct vhost_dev vhost_dev; VirtQueue *event_vq; + VirtQueue *recv_vq; + VirtQueue *trans_vq; QEMUTimer *post_load_timer; /*< public >*/