From nobody Tue Feb 10 09:24:49 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linux.intel.com ARC-Seal: i=1; a=rsa-sha256; t=1710127620; cv=none; d=zohomail.com; s=zohoarc; b=U/b0KpS/BrnCA0WiJJGcQJCRg1WfC4n2jA32o8G9pgslhEerLZLy7OMZO0m+emmLmIy7ULlAtxzgwdl70pIC5uLSie/b0zEXTwypJJ4vCFtwPJS0sQPQqXoQdJ0quTHYwQtp8PQoQ6/dxHRoUYnRk2weJ1DcAfigq1ii+fwDJYM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1710127620; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=8t81PFA62i6w5oLgJkrhNFHlftuPk/1sQ8z1Z/94dYg=; b=CdoEniRjLgSW6DLjfxwuFtPK6i9k38Zi/V68HsLztsJuCMlZFfY4ujg07/lJSqDYQecggcFNpslB91gttHRmaADOK0JPPZ0ED8Pip2BzMiz5eeU1Cf9I5WYV0s/CLKG2nyHLz7MPBKM4P6OvqytTE72qj1WmI0o7+MAsK2KR2mM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1710127620463840.6130225901546; Sun, 10 Mar 2024 20:27:00 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rjWIc-0006qI-Om; Sun, 10 Mar 2024 23:26:02 -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 1rjWIV-0006Nk-Q9; Sun, 10 Mar 2024 23:25:56 -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 1rjWIU-0008EJ-18; Sun, 10 Mar 2024 23:25:55 -0400 Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Mar 2024 20:25:31 -0700 Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by fmviesa003.fm.intel.com with ESMTP; 10 Mar 2024 20:25:29 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1710127554; x=1741663554; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Vhjy1DpbGaIvfiMMR/WA6udExEgCFb+nLNgH2lQLdrI=; b=dtZYsyCvDkt/CYvo7HWzYUkngUEh3Ia/SND6eu66Fw0Xe08XNAeMPrdV YhRn/eFoULpYhwWSh/aFbqv+xMSHTsTl1qmj00rPUjb2RDSM05fr92EwI z9Jd7lA+hinGGcp+ifX2kZiCZv9KOkgoQgg47udZbn3Abkn84yBjXER6O Qu4nQUycRgskoHmZTPZ2MEUaaUw0WKSOrx+zrnqrLanhZ4nuPWfka911c RCc1+XlYL5BujwQcT2S/pvbEM4iss+kZkrN03t/QnXdFzPsB9yIput7rX rMqh6MyMbVbyShfitqh0QiSzlKynGF/DcvvLK90moTY6/oWhKWpnMvo4D Q==; X-IronPort-AV: E=McAfee;i="6600,9927,11009"; a="22229726" X-IronPort-AV: E=Sophos;i="6.07,115,1708416000"; d="scan'208";a="22229726" X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,115,1708416000"; d="scan'208";a="15593950" From: Zhao Liu To: Thomas Huth , Markus Armbruster , Michael Roth , Michael Tokarev , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org Cc: qemu-trivial@nongnu.org, Zhao Liu , Juan Quintela , Manos Pitsidianakis , Michael Galaxy , Steve Sistare Subject: [PATCH v2 16/29] hw/misc/ivshmem: Fix missing ERRP_GUARD() for error_prepend() Date: Mon, 11 Mar 2024 11:38:09 +0800 Message-Id: <20240311033822.3142585-17-zhao1.liu@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240311033822.3142585-1-zhao1.liu@linux.intel.com> References: <20240311033822.3142585-1-zhao1.liu@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=198.175.65.10; envelope-from=zhao1.liu@linux.intel.com; helo=mgamail.intel.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=-0.945, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1710127620894100001 Content-Type: text/plain; charset="utf-8" From: Zhao Liu As the comment in qapi/error, passing @errp to error_prepend() requires ERRP_GUARD(): * =3D Why, when and how to use ERRP_GUARD() =3D * * Without ERRP_GUARD(), use of the @errp parameter is restricted: ... * - It should not be passed to error_prepend(), error_vprepend() or * error_append_hint(), because that doesn't work with &error_fatal. * 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. ERRP_GUARD() could avoid the case when @errp is &error_fatal, the user can't see this additional information, because exit() happens in error_setg earlier than information is added [1]. The ivshmem_common_realize() passes @errp to error_prepend(), and as a DeviceClass.realize method, there are too many possible callers to check the impact of this defect; it may or may not be harmless. Thus it is necessary to protect @errp with ERRP_GUARD(). To avoid the issue like [1] said, add missing ERRP_GUARD() at the beginning of this function. [1]: Issue description in the commit message of commit ae7c80a7bd73 ("error: New macro ERRP_GUARD()"). Cc: Juan Quintela Cc: Manos Pitsidianakis Cc: Michael Galaxy Cc: Steve Sistare Signed-off-by: Zhao Liu --- v2: Use Markus' sentence to polish commit message. (Markus) --- hw/misc/ivshmem.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c index a2fd0bc36544..de49d1b8a826 100644 --- a/hw/misc/ivshmem.c +++ b/hw/misc/ivshmem.c @@ -832,6 +832,7 @@ static void ivshmem_write_config(PCIDevice *pdev, uint3= 2_t address, =20 static void ivshmem_common_realize(PCIDevice *dev, Error **errp) { + ERRP_GUARD(); IVShmemState *s =3D IVSHMEM_COMMON(dev); Error *err =3D NULL; uint8_t *pci_conf; --=20 2.34.1