From mboxrd@z Thu Jan 1 00:00:00 1970 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 64298F3380C for ; Tue, 17 Mar 2026 08:07:03 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w2PS6-0005cs-An; Tue, 17 Mar 2026 04:06:58 -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 1w2PRp-0005bD-Vw for qemu-trivial@nongnu.org; Tue, 17 Mar 2026 04:06:43 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w2PRk-0005Nj-Q4 for qemu-trivial@nongnu.org; Tue, 17 Mar 2026 04:06:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1773734793; 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; bh=Z4U99hlQUgfbaLsEk4Tlb2mniZhJ236YrLd0kHtjiRY=; b=Pgj4N+pKdECRcwv9K4DylCBjK7Y5Ly0sY5JZNqB42EnK33bkrYH9Gzr+yaiJmzYw7y2LXz cyG5OrHUIXqNr75yqWO1luJGSFYS+Vv62i2GEzC8Wp++0DxF3qH5bmD/yyUiC3h23Tx1S3 Xl0ERN1QiPGr2x/c4Brt+ApQZhHf8Qo= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-690-ib1YRWjtPdKFxMwHx-kIew-1; Tue, 17 Mar 2026 04:06:29 -0400 X-MC-Unique: ib1YRWjtPdKFxMwHx-kIew-1 X-Mimecast-MFC-AGG-ID: ib1YRWjtPdKFxMwHx-kIew_1773734789 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 65FBC1955DB6; Tue, 17 Mar 2026 08:06:28 +0000 (UTC) Received: from thuth-p1g4.redhat.com (unknown [10.44.32.37]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 4D97A19560AB; Tue, 17 Mar 2026 08:06:25 +0000 (UTC) From: Thomas Huth To: Mark Cave-Ayland , qemu-devel@nongnu.org Cc: qemu-trivial@nongnu.org, BALATON Zoltan , Markus Armbruster Subject: [PATCH] hw/display/cg3: Fix crash when introspecting cgthree from the CLI Date: Tue, 17 Mar 2026 09:06:23 +0100 Message-ID: <20260317080623.438230-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Mimecast-MFC-PROC-ID: JTxss3vnVL7UeTrewhGBlJNwf7XSc5Vxj1UoQ7XbvsA_1773734789 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true Received-SPF: pass client-ip=170.10.133.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.819, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.903, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-trivial@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-trivial-bounces+qemu-trivial=archiver.kernel.org@nongnu.org Sender: qemu-trivial-bounces+qemu-trivial=archiver.kernel.org@nongnu.org From: Thomas Huth QEMU currently crashes when introspecting the cgthree device from the command line interface: $ ./qemu-system-sparc -device cgthree,help Segmentation fault (core dumped) This happens because the memory_region_init_rom() function internally calls qemu_ram_alloc_internal() that needs the current_machine pointer to be set up - which is not the case here since the machine has not been created yet. There does not seem to be a compelling reason for initializing the memory regions from the instance_init function, so let's simply move the code into the realize() function instead to fix this issue. Signed-off-by: Thomas Huth --- hw/display/cg3.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/hw/display/cg3.c b/hw/display/cg3.c index 61bdb0552e9..0a413fbb7ec 100644 --- a/hw/display/cg3.c +++ b/hw/display/cg3.c @@ -277,10 +277,13 @@ static const GraphicHwOps cg3_ops = { .gfx_update = cg3_update_display, }; -static void cg3_initfn(Object *obj) +static void cg3_realizefn(DeviceState *dev, Error **errp) { - SysBusDevice *sbd = SYS_BUS_DEVICE(obj); - CG3State *s = CG3(obj); + SysBusDevice *sbd = SYS_BUS_DEVICE(dev); + Object *obj = OBJECT(dev); + CG3State *s = CG3(dev); + int ret; + char *fcode_filename; memory_region_init_rom(&s->rom, obj, "cg3.prom", FCODE_MAX_ROM_SIZE, &error_fatal); @@ -289,14 +292,6 @@ static void cg3_initfn(Object *obj) memory_region_init_io(&s->reg, obj, &cg3_reg_ops, s, "cg3.reg", CG3_REG_SIZE); sysbus_init_mmio(sbd, &s->reg); -} - -static void cg3_realizefn(DeviceState *dev, Error **errp) -{ - SysBusDevice *sbd = SYS_BUS_DEVICE(dev); - CG3State *s = CG3(dev); - int ret; - char *fcode_filename; /* FCode ROM */ fcode_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, CG3_ROM_FILE); @@ -381,7 +376,6 @@ static const TypeInfo cg3_info = { .name = TYPE_CG3, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(CG3State), - .instance_init = cg3_initfn, .class_init = cg3_class_init, }; -- 2.53.0