From patchwork Tue Jun 21 10:02:43 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: 9190281 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 C594C6075A for ; Tue, 21 Jun 2016 10:28:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B5ECD280CF for ; Tue, 21 Jun 2016 10:28:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AADFD28111; Tue, 21 Jun 2016 10:28:17 +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 62547280CF for ; Tue, 21 Jun 2016 10:28:17 +0000 (UTC) Received: from localhost ([::1]:50506 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFIum-0000TN-JO for patchwork-qemu-devel@patchwork.kernel.org; Tue, 21 Jun 2016 06:28:16 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46388) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFIWZ-0005FG-CF for qemu-devel@nongnu.org; Tue, 21 Jun 2016 06:03:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bFIWY-0000Kl-Bq for qemu-devel@nongnu.org; Tue, 21 Jun 2016 06:03:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58560) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFIWY-0000KT-66 for qemu-devel@nongnu.org; Tue, 21 Jun 2016 06:03:14 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) (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 B3B4980F92; Tue, 21 Jun 2016 10:03:13 +0000 (UTC) Received: from localhost ([10.41.1.246]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u5LA3CTx028838; Tue, 21 Jun 2016 06:03:13 -0400 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Date: Tue, 21 Jun 2016 12:02:43 +0200 Message-Id: <1466503372-28334-16-git-send-email-marcandre.lureau@redhat.com> In-Reply-To: <1466503372-28334-1-git-send-email-marcandre.lureau@redhat.com> References: <1466503372-28334-1-git-send-email-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 21 Jun 2016 10:03:13 +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 15/24] 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 2c6535c..e4eb97e 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1032,7 +1032,8 @@ 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; @@ -1078,14 +1079,9 @@ 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; }