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 1B429C54E60 for ; Mon, 11 Mar 2024 03:25:54 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rjWHT-0005YQ-LG; Sun, 10 Mar 2024 23:24:51 -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 1rjWHR-0005XP-J8; Sun, 10 Mar 2024 23:24:49 -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 1rjWHQ-0007qJ-24; Sun, 10 Mar 2024 23:24:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1710127488; x=1741663488; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Ku/zdz8Cve9RNOFOIfrMmxPdZkjkIFoafU6wceTFb3Q=; b=Z9IMVOIn7eZBNdVUO8W2jCM9Hbe79eSb27gCwXNUxPB1Y51XTIvBUKh4 K8/N4ZwiHibzVPHb1PTIrYqdFFB8tFU+svkCpu32lRaz/GgdsvEVU+F8v oUGoTlSZbTg04ZyVlB36hcT3xoNAczw4AGGm1Sfz92y/2QrIaQMMK33tN SBwn/34vqhrc3vjtHxFrJdcaQy0+6ZAAmh5egqx5bAmSZCyWPG9lO0ygH tERAdOLeMiJUMA5pFv2aGwxoOcBqFph9ZA3OmISs7lWOIisJbVdD9ivHY 0Lg4nuvcbKdhUwXFvfEixPyDI6a22Gax57XEty3cWTrT2lW3NKmo5sKnd A==; X-IronPort-AV: E=McAfee;i="6600,9927,11009"; a="22229581" X-IronPort-AV: E=Sophos;i="6.07,115,1708416000"; d="scan'208";a="22229581" 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 20:24:46 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,115,1708416000"; d="scan'208";a="15593716" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by fmviesa003.fm.intel.com with ESMTP; 10 Mar 2024 20:24:44 -0700 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 , Yi Liu , Eric Auger , Zhenzhong Duan Subject: [PATCH v2 02/29] backends/iommufd: Fix missing ERRP_GUARD() for error_prepend() Date: Mon, 11 Mar 2024 11:37:55 +0800 Message-Id: <20240311033822.3142585-3-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: 8bit 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Zhao Liu As the comment in qapi/error, passing @errp to error_prepend() requires ERRP_GUARD(): * = Why, when and how to use ERRP_GUARD() = * * 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 iommufd_backend_set_fd() passes @errp to error_prepend(), to avoid the above issue, 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: Yi Liu Cc: Eric Auger Cc: Zhenzhong Duan Signed-off-by: Zhao Liu Reviewed-by: Zhenzhong Duan --- backends/iommufd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/backends/iommufd.c b/backends/iommufd.c index 1ef683c7b080..62a79fa6b049 100644 --- a/backends/iommufd.c +++ b/backends/iommufd.c @@ -43,6 +43,7 @@ static void iommufd_backend_finalize(Object *obj) static void iommufd_backend_set_fd(Object *obj, const char *str, Error **errp) { + ERRP_GUARD(); IOMMUFDBackend *be = IOMMUFD_BACKEND(obj); int fd = -1; -- 2.34.1