From nobody Wed Feb 11 06:50:28 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1691264522229603.4293632092493; Sat, 5 Aug 2023 12:42:02 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qSN9f-0007cO-Ps; Sat, 05 Aug 2023 15:41:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qSN9e-0007bD-4O; Sat, 05 Aug 2023 15:41:38 -0400 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qSN9c-0007s1-Co; Sat, 05 Aug 2023 15:41:37 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 9867718660; Sat, 5 Aug 2023 22:41:50 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 637F71BA46; Sat, 5 Aug 2023 22:41:28 +0300 (MSK) Received: (nullmailer pid 70358 invoked by uid 1000); Sat, 05 Aug 2023 19:41:27 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Hawkins Jiawei , Jason Wang , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Lei Yang , "Michael S . Tsirkin" , Michael Tokarev Subject: [Stable-8.0.4 67/71] vdpa: Return -EIO if device ack is VIRTIO_NET_ERR in _load_mq() Date: Sat, 5 Aug 2023 22:41:08 +0300 Message-Id: <20230805194127.70304-4-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1691264523266100001 From: Hawkins Jiawei According to VirtIO standard, "The class, command and command-specific-data are set by the driver, and the device sets the ack byte. There is little it can do except issue a diagnostic if ack is not VIRTIO_NET_OK." Therefore, QEMU should stop sending the queued SVQ commands and cancel the device startup if the device's ack is not VIRTIO_NET_OK. Yet the problem is that, vhost_vdpa_net_load_mq() returns 1 based on `*s->status !=3D VIRTIO_NET_OK` when the device's ack is VIRTIO_NET_ERR. As a result, net->nc->info->load() also returns 1, this makes vhost_net_start_one() incorrectly assume the device state is successfully loaded by vhost_vdpa_net_load() and return 0, instead of goto `fail` label to cancel the device startup, as vhost_net_start_one() only cancels the device startup when net->nc->info->load() returns a negative value. This patch fixes this problem by returning -EIO when the device's ack is not VIRTIO_NET_OK. Fixes: f64c7cda69 ("vdpa: Add vhost_vdpa_net_load_mq") Signed-off-by: Hawkins Jiawei Acked-by: Jason Wang Acked-by: Eugenio P=C3=A9rez Message-Id: Tested-by: Lei Yang Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit f45fd95ec9e8104f6af801c734375029dda0f542) Signed-off-by: Michael Tokarev diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 92c74497b5..bda83c4b09 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -685,8 +685,11 @@ static int vhost_vdpa_net_load_mq(VhostVDPAState *s, if (unlikely(dev_written < 0)) { return dev_written; } + if (*s->status !=3D VIRTIO_NET_OK) { + return -EIO; + } =20 - return *s->status !=3D VIRTIO_NET_OK; + return 0; } =20 static int vhost_vdpa_net_load(NetClientState *nc) --=20 2.39.2