From patchwork Mon Jul 15 09:59:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Zhao Liu X-Patchwork-Id: 13733205 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 3AF1CC3DA59 for ; Mon, 15 Jul 2024 09:44:52 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sTIFk-0002Gr-VT; Mon, 15 Jul 2024 05:44:16 -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 1sTIFj-0002FA-Dn for qemu-devel@nongnu.org; Mon, 15 Jul 2024 05:44:15 -0400 Received: from mgamail.intel.com ([198.175.65.10]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sTIFg-0005Pt-Mk for qemu-devel@nongnu.org; Mon, 15 Jul 2024 05:44:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1721036652; x=1752572652; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=kdXjqi13CCe9SdliRbBIpnfNqhqkl6WeICywifF1dCI=; b=SQvu4KkHq/UnxSEz6fDVN+6SougkPZghncyMBZKERHLl+WCsv4jetn6d e1FbDzpNpebGblVv2VbwrkgamAHBgmLPikyZ5aReFDHQqntDZ5YrOr9mA aUbX93JDH+RU3+5pzhDgADoCowG4cB+Tn55FGK9KIBUYnIngv6XABZmJh j8fNW2D/tK03CFwQmlTFwm/BKOfbFVtRNxOoHeW4HoK18h5oWOkjs2VEf ik5zJHzXFwQETwXsJLOdVTGXP2NRPIW9l3qopvOG0b2lH3U//BcrNK5AF VV+4BNyURey26z3nFLI46cCEHvI/4ZlVnYYakPc7Qx21/4JpaDqpSUiFg A==; X-CSE-ConnectionGUID: x766oiNuTdeyTAHJBH1AbQ== X-CSE-MsgGUID: o5xPw17+Q/SKex5383hByg== X-IronPort-AV: E=McAfee;i="6700,10204,11133"; a="35837073" X-IronPort-AV: E=Sophos;i="6.09,210,1716274800"; d="scan'208";a="35837073" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jul 2024 02:44:09 -0700 X-CSE-ConnectionGUID: zahehWo1RLqTTaf3Hv4vmg== X-CSE-MsgGUID: GlMW/VGvSR+eSVXRjM7u8Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,210,1716274800"; d="scan'208";a="53854606" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by fmviesa003.fm.intel.com with ESMTP; 15 Jul 2024 02:44:08 -0700 From: Zhao Liu To: qemu-devel@nongnu.org Cc: Zhao Liu , Laurent Vivier , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Subject: [PATCH] hw/nubus/nubus-virtio-mmio: Fix missing ERRP_GUARD() in nubus_virtio_mmio_realize() Date: Mon, 15 Jul 2024 17:59:37 +0800 Message-Id: <20240715095939.72492-1-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Received-SPF: pass client-ip=198.175.65.10; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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_MED=-2.3, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org As the comment in qapi/error, dereferencing @errp requires ERRP_GUARD(): * = Why, when and how to use ERRP_GUARD() = * * Without ERRP_GUARD(), use of the @errp parameter is restricted: * - It must not be dereferenced, because it may be null. ... * ERRP_GUARD() lifts these restrictions. * * To use ERRP_GUARD(), add it right at the beginning of the function. * @errp can then be used without worrying about the argument being * NULL or &error_fatal. * * Using it when it's not needed is safe, but please avoid cluttering * the source with useless code. But in nubus_virtio_mmio_realize(), @errp is dereferenced without ERRP_GUARD(). Although nubus_virtio_mmio_realize() - as a DeviceClass.realize() method - doesn't get the NULL @errp parameter, it hasn't triggered the bug that dereferencing the NULL @errp. It's still necessary to follow the requirement of @errp, so add missing ERRP_GUARD() in nubus_virtio_mmio_realize(). Cc: Laurent Vivier Cc: Philippe Mathieu-Daudé Signed-off-by: Zhao Liu Reviewed-by: Markus Armbruster --- hw/nubus/nubus-virtio-mmio.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/nubus/nubus-virtio-mmio.c b/hw/nubus/nubus-virtio-mmio.c index 58a63c84d0be..a5558d3ec28b 100644 --- a/hw/nubus/nubus-virtio-mmio.c +++ b/hw/nubus/nubus-virtio-mmio.c @@ -23,6 +23,7 @@ static void nubus_virtio_mmio_set_input_irq(void *opaque, int n, int level) static void nubus_virtio_mmio_realize(DeviceState *dev, Error **errp) { + ERRP_GUARD(); NubusVirtioMMIODeviceClass *nvmdc = NUBUS_VIRTIO_MMIO_GET_CLASS(dev); NubusVirtioMMIO *s = NUBUS_VIRTIO_MMIO(dev); NubusDevice *nd = NUBUS_DEVICE(dev);