From patchwork Wed Sep 13 14:49:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Laszlo Ersek X-Patchwork-Id: 1833624 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=NDT07nEJ; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4Rm3L925htz1yhg for ; Thu, 14 Sep 2023 00:51:13 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qgRC5-000110-17; Wed, 13 Sep 2023 10:50:19 -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 1qgRBy-0000yG-H1 for qemu-devel@nongnu.org; Wed, 13 Sep 2023 10:50:10 -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 1qgRBw-0000KC-9g for qemu-devel@nongnu.org; Wed, 13 Sep 2023 10:50:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1694616607; 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=4vZTivdXi5pRVkwl8cN/DGNi6t7j0fF1pSnYTruMtbQ=; b=NDT07nEJmqYZXiN7LjoEeuEOgTu76twh/XWywMCsSDSnSlc7Kfw49+EVU4xgzO8HN+qKWE 7DUK2FEoAVCLuNB5KzdTiNcoqgE5BoPEbU/basqPqUC3dF6ZPAPVGFIMrt+2nWC0kfq07w dve+dNBbKpO98+3Ckyqh+X0AdQWiC6Y= 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-333-jAdAjrasPMmnxNEwfZvDlg-1; Wed, 13 Sep 2023 10:50:05 -0400 X-MC-Unique: jAdAjrasPMmnxNEwfZvDlg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 25EEB100BACB for ; Wed, 13 Sep 2023 14:50:05 +0000 (UTC) Received: from lacos-laptop-9.usersys.redhat.com (unknown [10.39.194.255]) by smtp.corp.redhat.com (Postfix) with ESMTP id 48C122904; Wed, 13 Sep 2023 14:50:04 +0000 (UTC) From: Laszlo Ersek To: lersek@redhat.com, qemu-devel@nongnu.org Cc: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Gerd Hoffmann Subject: [PATCH 2/4] ui/console: only walk QemuGraphicConsoles in qemu_console_is_multihead() Date: Wed, 13 Sep 2023 16:49:57 +0200 Message-Id: <20230913144959.41891-3-lersek@redhat.com> In-Reply-To: <20230913144959.41891-1-lersek@redhat.com> References: <20230913144959.41891-1-lersek@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=lersek@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org qemu_console_is_multihead() declares the console "c" a "multihead" console if there are two different consoles in the system that (a) both reference "c->device", and (b) have different "c->head" numbers. In effect, if at least two consoles exist that are different heads of the same device that underlies "c". Commit 58d5870845c6 ("ui/console: move graphic fields to QemuGraphicConsole", 2023-09-04) pushed the "device" and "head" members from the QemuConsole base class down to the QemuGraphicConsole subclass, adjusting the referring QOM properties accordingly as well. As a result, the "device" property lookup in qemu_console_is_multihead() now crashes, in case the candidate console being investigated for criterion (a) is not a QemuGraphicConsole instance: > Unexpected error in object_property_find_err() at qom/object.c:1314: > qemu: Property 'qemu-fixed-text-console.device' not found > Aborted (core dumped) This is effectively an unchecked downcast. Make it checked: only consider such console candidates that are themselves QemuGraphicConsole instances. Cc: "Marc-André Lureau" (odd fixer:Graphics) Cc: Gerd Hoffmann (odd fixer:Graphics) Fixes: 58d5870845c6 Signed-off-by: Laszlo Ersek --- ui/console.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/ui/console.c b/ui/console.c index adacc3473140..2ee65207b430 100644 --- a/ui/console.c +++ b/ui/console.c @@ -2373,6 +2373,9 @@ static bool qemu_console_is_multihead(DeviceState *dev) uint32_t h; QTAILQ_FOREACH(con, &consoles, next) { + if (!QEMU_IS_GRAPHIC_CONSOLE(con)) { + continue; + } obj = object_property_get_link(OBJECT(con), "device", &error_abort); if (DEVICE(obj) != dev) {