From patchwork Thu Jul 7 01:00:33 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= X-Patchwork-Id: 9217493 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 42FE760752 for ; Thu, 7 Jul 2016 01:01:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 336B4285A2 for ; Thu, 7 Jul 2016 01:01:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 283B2285A4; Thu, 7 Jul 2016 01:01:57 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CCFA1285A2 for ; Thu, 7 Jul 2016 01:01:56 +0000 (UTC) Received: from localhost ([::1]:36596 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bKxhT-0004nd-Vv for patchwork-qemu-devel@patchwork.kernel.org; Wed, 06 Jul 2016 21:01:56 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56562) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bKxgn-0004dN-RR for qemu-devel@nongnu.org; Wed, 06 Jul 2016 21:01:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bKxgl-0006Z1-R7 for qemu-devel@nongnu.org; Wed, 06 Jul 2016 21:01:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51971) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bKxgl-0006Yu-LH for qemu-devel@nongnu.org; Wed, 06 Jul 2016 21:01:11 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 28FA480B20; Thu, 7 Jul 2016 01:01:11 +0000 (UTC) Received: from localhost (ovpn-116-37.phx2.redhat.com [10.3.116.37]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u6711AdQ014086; Wed, 6 Jul 2016 21:01:10 -0400 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Date: Thu, 7 Jul 2016 03:00:33 +0200 Message-Id: <20160707010053.28008-10-marcandre.lureau@redhat.com> In-Reply-To: <20160707010053.28008-1-marcandre.lureau@redhat.com> References: <20160707010053.28008-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Thu, 07 Jul 2016 01:01:11 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v4 09/29] vhost: fix calling vhost_dev_cleanup() after vhost_dev_init() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: yuanhan.liu@linux.intel.com, victork@redhat.com, mst@redhat.com, jonshin@cisco.com, mukawa@igel.co.jp, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Marc-André Lureau vhost_net_init() calls vhost_dev_init() and in case of failure, calls vhost_dev_cleanup() directly. However, the structure is already partially cleaned on error. Calling vhost_dev_cleanup() again will call vhost_virtqueue_cleanup() on already clean queues, and causing potential double-close. Instead, adjust dev->nvqs and simplify vhost_dev_init() code to call vhost_virtqueue_cleanup(). Signed-off-by: Marc-André Lureau --- hw/virtio/vhost.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index fa8d5f0..63954a0 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1025,7 +1025,8 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque, for (i = 0; i < hdev->nvqs; ++i) { r = vhost_virtqueue_init(hdev, hdev->vqs + i, hdev->vq_index + i); if (r < 0) { - goto fail_vq; + hdev->nvqs = i; + goto fail; } } hdev->features = features; @@ -1071,14 +1072,9 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque, memory_listener_register(&hdev->memory_listener, &address_space_memory); QLIST_INSERT_HEAD(&vhost_devices, hdev, entry); return 0; -fail_vq: - while (--i >= 0) { - vhost_virtqueue_cleanup(hdev->vqs + i); - } + fail: - r = -errno; - hdev->vhost_ops->vhost_backend_cleanup(hdev); - QLIST_REMOVE(hdev, entry); + vhost_dev_cleanup(hdev); return r; }