From patchwork Mon May 29 11:43:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prasad Pandit X-Patchwork-Id: 13258452 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 60B13C77B7E for ; Mon, 29 May 2023 11:42:04 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1q3bFy-0000sS-AF; Mon, 29 May 2023 07:41:54 -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 1q3bFt-0000oz-O7 for qemu-devel@nongnu.org; Mon, 29 May 2023 07:41:41 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q3bFr-0002XT-54 for qemu-devel@nongnu.org; Mon, 29 May 2023 07:41:40 -0400 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= 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 X-MC-Unique: 06__D_nNN9ihecOOvw6SBw-1 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) 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 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org 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 Reviewed-by: Peter Xu Acked-by: Jason Wang --- 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. -- 2.40.1 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 = false; hdev->started = false;