From patchwork Tue Jun 15 17:40:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 12322561 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB2D8C48BDF for ; Tue, 15 Jun 2021 17:49:09 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 6A4F461009 for ; Tue, 15 Jun 2021 17:49:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6A4F461009 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:51648 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ltDBU-0004BA-Ku for qemu-devel@archiver.kernel.org; Tue, 15 Jun 2021 13:49:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46466) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltD3h-0000Ch-6s for qemu-devel@nongnu.org; Tue, 15 Jun 2021 13:41:05 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:25400) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltD3e-0003ZG-Ln for qemu-devel@nongnu.org; Tue, 15 Jun 2021 13:41:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623778860; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iV4BAQ+klh6qramPeT9npbbKerAjx5rq2qDIbQIR4U8=; b=bWRE+SLDatnzpg2pXq6qRricV2BMWndqk4q8TWyqzQWF/MSOqs1sM2KJRSTcKozY1mNNfO nYfx/mX+OGXx+U3cRY1WJHVZsQmJsg+q8o2gKKIFNd+4B+10MO/Ah860AWvIJJG+2YjTjz 0e1k6h+lsZIvkEYnIy9Fyv5etGBjEMo= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-353-i5h_1kiuNCq9YkfOZ_O_TQ-1; Tue, 15 Jun 2021 13:40:59 -0400 X-MC-Unique: i5h_1kiuNCq9YkfOZ_O_TQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 77B70100B3AB; Tue, 15 Jun 2021 17:40:57 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-112-38.ams2.redhat.com [10.36.112.38]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 99C4B5C22A; Tue, 15 Jun 2021 17:40:47 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id F1361180060E; Tue, 15 Jun 2021 19:40:25 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PULL 3/3] virtio-gpu: move scanout_id sanity check Date: Tue, 15 Jun 2021 19:40:25 +0200 Message-Id: <20210615174025.3409518-4-kraxel@redhat.com> In-Reply-To: <20210615174025.3409518-1-kraxel@redhat.com> References: <20210615174025.3409518-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.197, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Michael S. Tsirkin" , Li Qiang , Vivek Kasireddy , Alexander Bulekov , Gerd Hoffmann , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Checking scanout_id in virtio_gpu_do_set_scanout() is too late, for the "resource_id == 0" case (aka disable scanout) the scanout_id is used unchecked. Move the check into the callers to fix that. Fixes: e64d4b6a9bc3 ("virtio-gpu: Refactor virtio_gpu_set_scanout") Fixes: 32db3c63ae11 ("virtio-gpu: Add virtio_gpu_set_scanout_blob") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/383 Reported-by: Alexander Bulekov Signed-off-by: Gerd Hoffmann Reviewed-by: Vivek Kasireddy Reviewed-by: Li Qiang Message-Id: <20210604075029.1201478-1-kraxel@redhat.com> --- hw/display/virtio-gpu.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index 4d549377cbc1..e183f4ecdaa5 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -610,12 +610,6 @@ static void virtio_gpu_do_set_scanout(VirtIOGPU *g, struct virtio_gpu_scanout *scanout; uint8_t *data; - if (scanout_id >= g->parent_obj.conf.max_outputs) { - qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d", - __func__, scanout_id); - *error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID; - return; - } scanout = &g->parent_obj.scanout[scanout_id]; if (r->x > fb->width || @@ -694,6 +688,13 @@ static void virtio_gpu_set_scanout(VirtIOGPU *g, trace_virtio_gpu_cmd_set_scanout(ss.scanout_id, ss.resource_id, ss.r.width, ss.r.height, ss.r.x, ss.r.y); + if (ss.scanout_id >= g->parent_obj.conf.max_outputs) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d", + __func__, ss.scanout_id); + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID; + return; + } + if (ss.resource_id == 0) { virtio_gpu_disable_scanout(g, ss.scanout_id); return; @@ -730,6 +731,13 @@ static void virtio_gpu_set_scanout_blob(VirtIOGPU *g, ss.r.width, ss.r.height, ss.r.x, ss.r.y); + if (ss.scanout_id >= g->parent_obj.conf.max_outputs) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d", + __func__, ss.scanout_id); + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID; + return; + } + if (ss.resource_id == 0) { virtio_gpu_disable_scanout(g, ss.scanout_id); return;