From nobody Sun Feb 8 17:03:26 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1685360524; cv=none; d=zohomail.com; s=zohoarc; b=MROOD6Q4WlNOcmbUNwDoX86kGfsFbGuOQsbRXSwAfvRT2Iho2YiWyFKcEwaUyxnqmsnr04sobPDMi72WtWoy+kfTlLPT7vyZtRf71YHiQwQhQXfB5ZUd+5CuHHEFg3fmfK3ClKrl599Gxvu348FIYiL85LnyGnmHElvt2AC8O38= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1685360524; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=cxlvG+SKp/TJYyFvWUE7GPgQpUVIg7esatFIfNNbTyE=; b=fVkSxTABQu1kXFRUdqPa51RHtQKL7dwpaH5pI1qcewtgQJPu4/23jbeBt7nvn6QgpAB3fJe25HXF2BTA48R+VesYiHRVSJ69QPkcKIkvpI3GdDN8orNCURu4ruj/BCDnA/YFX6lEUpFQYxPJ4a91ezXISWvhYUg6K0mfn6AHLew= ARC-Authentication-Results: i=1; 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Mon, 29 May 2023 07:41:40 -0400 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-21-06__D_nNN9ihecOOvw6SBw-1; Mon, 29 May 2023 07:41:35 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AFEC28007D9; Mon, 29 May 2023 11:41:34 +0000 (UTC) Received: from kaapi.redhat.com (unknown [10.74.17.140]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8B54035443; Mon, 29 May 2023 11:41:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1685360496; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cxlvG+SKp/TJYyFvWUE7GPgQpUVIg7esatFIfNNbTyE=; b=D987wU1oEu8kyhJ031cfxYyR0Y6MZszrey89GWPU4ATJzhAbY/3OLaHeXkQIJDbQQusyl7 TX3hzpU34F8cxrzroSCiXUL6wYca4txNYWh7TWvq7u66h0e8XnX5i6x/FF3CA6OtPyhp+D 1nC6tB9noQRb4HD4rpRMOtr+O7EwJhw= X-MC-Unique: 06__D_nNN9ihecOOvw6SBw-1 From: P J P To: Peter Xu Cc: QEMU Developers , Jason Wang , Michael S Tsirkin , Prasad Pandit Subject: [PATCH v2 1/2] vhost: release memory_listener object in error path Date: Mon, 29 May 2023 17:13:32 +0530 Message-Id: <20230529114333.31686-2-ppandit@redhat.com> In-Reply-To: <20230529114333.31686-1-ppandit@redhat.com> References: <20230529114333.31686-1-ppandit@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 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=170.10.129.124; envelope-from=ppandit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.16, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1685360525201100001 Content-Type: text/plain; charset="utf-8" From: Prasad Pandit vhost_dev_start function does not release memory_listener object in case of an error. This may crash the guest when vhost is unable to set memory table: stack trace of thread 125653: Program terminated with signal SIGSEGV, Segmentation fault #0 memory_listener_register (qemu-kvm + 0x6cda0f) #1 vhost_dev_start (qemu-kvm + 0x699301) #2 vhost_net_start (qemu-kvm + 0x45b03f) #3 virtio_net_set_status (qemu-kvm + 0x665672) #4 qmp_set_link (qemu-kvm + 0x548fd5) #5 net_vhost_user_event (qemu-kvm + 0x552c45) #6 tcp_chr_connect (qemu-kvm + 0x88d473) #7 tcp_chr_new_client (qemu-kvm + 0x88cf83) #8 tcp_chr_accept (qemu-kvm + 0x88b429) #9 qio_net_listener_channel_func (qemu-kvm + 0x7ac07c) #10 g_main_context_dispatch (libglib-2.0.so.0 + 0x54e2f) Release memory_listener objects in the error path. Signed-off-by: Prasad Pandit Acked-by: Jason Wang Reviewed-by: Peter Xu --- hw/virtio/vhost.c | 3 +++ 1 file changed, 3 insertions(+) v2: split a single patch into two. Mention about vhost set mem table failure resulting in guest crash. diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 23da579ce2..6be4a0626a 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -2004,6 +2004,9 @@ fail_vq: } fail_mem: + if (vhost_dev_has_iommu(hdev)) { + memory_listener_unregister(&hdev->iommu_listener); + } fail_features: vdev->vhost_started =3D false; hdev->started =3D false; -- 2.40.1 From nobody Sun Feb 8 17:03:26 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1685360565; cv=none; d=zohomail.com; s=zohoarc; b=TprZ4VVahb29lH0xUWV8zpjjwK2pXrpudeC91OonxJnQChdXR2BVzIxsqWn59ojTJU1I4xfJdgSsrz7POghsS0hI9bnOrfE3XXKUfFNI6Of5muNLSHJ/hZAkLrlF6Irr1LLuMOVBbzrqU03BjA2L3kTwr7gr29XH1lRhEz3LlG0= ARC-Message-Signature: i=1; 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Mon, 29 May 2023 11:41:37 +0000 (UTC) Received: from kaapi.redhat.com (unknown [10.74.17.140]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 522033543C; Mon, 29 May 2023 11:41:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1685360505; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=WbBrYIxtVFiTDARVF8H/CLAeT7nIT25HgHI0prq3t2k=; b=Y4czPj6eKFLOvJTsxA78Nyfj8jDF15WMQRe4pW+/furGaDEEOXnOzBk6mqN2a+nUvBGvuq MWvFNrVybtQC7vrVWwX+e3t8uLv5oX+LUZn6AvCFXm0G8VRba9HL/znv2VqVfiIyRQm737 d4I4Vz/aBEqE27mvM9d7o+asS6hbUSQ= X-MC-Unique: -kWSQb30MUWK1K1m_zu1UA-1 From: P J P To: Peter Xu Cc: QEMU Developers , Jason Wang , Michael S Tsirkin , Prasad Pandit Subject: [PATCH v2 2/2] vhost: release virtqueue objects in error path Date: Mon, 29 May 2023 17:13:33 +0530 Message-Id: <20230529114333.31686-3-ppandit@redhat.com> In-Reply-To: <20230529114333.31686-1-ppandit@redhat.com> References: <20230529114333.31686-1-ppandit@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 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=170.10.129.124; envelope-from=ppandit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.16, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1685360565864100001 Content-Type: text/plain; charset="utf-8" From: Prasad Pandit vhost_dev_start function does not release virtqueue objects when event_notifier_init() function fails. Release virtqueue objects and log a message about function failure. Signed-off-by: Prasad Pandit Acked-by: Jason Wang Reviewed-by: Peter Xu --- hw/virtio/vhost.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) v2: split a single patch into two. diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 6be4a0626a..1de3029ae7 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1942,7 +1942,8 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODev= ice *vdev, bool vrings) r =3D event_notifier_init( &hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier, 0); if (r < 0) { - return r; + VHOST_OPS_DEBUG(r, "event_notifier_init failed"); + goto fail_vq; } event_notifier_test_and_clear( &hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier); -- 2.40.1