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 lists1p.gnu.org (lists1p.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 21589CD4F26 for ; Fri, 19 Jun 2026 09:32:34 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1waVa0-00060Z-UM; Fri, 19 Jun 2026 05:32:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1waVZr-0005zY-K2 for qemu-devel@nongnu.org; Fri, 19 Jun 2026 05:31:55 -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 1waVZq-0003Kr-5C for qemu-devel@nongnu.org; Fri, 19 Jun 2026 05:31:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1781861512; 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=H7d3hejmPS8Cty7Wq2vvEVZx9APcf+hzhdVW5f8yQ/Y=; b=Kb7utZkovFuuDPVXDFWovkJ9zeRtxpUVE9EF17+KfSgeDhckAP7LrBH0U/DiqdT8U3aUtQ FmM+iTHlgFux8gzTP9TGFM5hvQ9I+xNo3Kj2N7gDvZ8Q1UkwvF9pS/v2egoQaJQnH1w7YG q05WvXSv9/MKuDWb911vV6Jve+q6ioU= Received: from mx-prod-mc-01.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-437-odXh5Tl0Os2Cj_RzpdblTw-1; Fri, 19 Jun 2026 05:31:50 -0400 X-MC-Unique: odXh5Tl0Os2Cj_RzpdblTw-1 X-Mimecast-MFC-AGG-ID: odXh5Tl0Os2Cj_RzpdblTw_1781861509 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-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 43CD7195605B; Fri, 19 Jun 2026 09:31:49 +0000 (UTC) Received: from mbawa-thinkpadt14gen5.redhat.corp (headnet04.pony-001.prod.iad2.dc.redhat.com [10.2.32.116]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 6529C1956088; Fri, 19 Jun 2026 09:31:46 +0000 (UTC) From: Mohammadfaiz Bawa To: Stefan Berger , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org, Peter Maydell Cc: Zhao Liu Subject: [PATCH v3 1/3] hw/core/platform-bus: guard platform_bus_get_mmio_addr() against NULL Date: Fri, 19 Jun 2026 15:01:38 +0530 Message-ID: <20260619093140.832136-2-mbawa@redhat.com> In-Reply-To: <20260619093140.832136-1-mbawa@redhat.com> References: <20260619093140.832136-1-mbawa@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass client-ip=170.10.129.124; envelope-from=mbawa@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 8 X-Spam_score: 0.8 X-Spam_bar: / X-Spam_report: (0.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_SBL_CSS=3.335, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development 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 sysbus_mmio_get_region() returns NULL when a device has fewer MMIO regions than the requested slot index. platform_bus_get_mmio_addr() passes the result directly to memory_region_is_mapped() without a NULL check, causing a SIGSEGV. Return -1 early when the region pointer is NULL, consistent with the existing "not mapped" path. Reviewed-by: Peter Maydell Signed-off-by: Mohammadfaiz Bawa --- hw/core/platform-bus.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/hw/core/platform-bus.c b/hw/core/platform-bus.c index a2217a2dee..16d0ecc0f3 100644 --- a/hw/core/platform-bus.c +++ b/hw/core/platform-bus.c @@ -59,8 +59,7 @@ hwaddr platform_bus_get_mmio_addr(PlatformBusDevice *pbus, SysBusDevice *sbdev, Object *pbus_mr_obj = OBJECT(pbus_mr); Object *parent_mr; - if (!memory_region_is_mapped(sbdev_mr)) { - /* Region is not mapped? */ + if (!sbdev_mr || !memory_region_is_mapped(sbdev_mr)) { return -1; } -- 2.54.0