From nobody Tue Feb 10 12:40:04 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=1710127649; cv=none; d=zohomail.com; s=zohoarc; b=MuHm66JyoEbHKUYCYFKTHpiMJ/hBV/QF+Rk60zD+UiQGBsL7YHJZyg3bZNLLhKXIqV1sxSKZUt/cp8CG0CcVkS1ku9uqmBoZmw+qeNG9FzBx3fKCl4pYST3sLZp0r6k58V4UJH/h00barUJ/Eboed3uu96uksN6dXbg0GH+M7eQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1710127649; 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=IKYtAAAKZfYcgAVejoWI4JtzYcF74/cEZvN0TUVQXOs=; b=JX4lhelIR+FY2+yly6dL1wwhLw4ndW7qrOPqycnUPShlTmEYq4lRlB/Pbe5CgdysDAwrmSsg7jpmvV/Goeo2GP23/g+uriKWxU6gyrcat/z+m883HP9LiVKXLbDaRS6iKv2i9RgE/ZftdbzI60N0ekJMOSH7fvcOOWv5kpYFhDA= 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 1710127649858753.9829856268569; Sun, 10 Mar 2024 20:27:29 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rjWJL-0002BH-Nl; Sun, 10 Mar 2024 23:26:47 -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 1rjWJK-0001zx-7k; Sun, 10 Mar 2024 23:26:46 -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 1rjWJH-00084P-W6; Sun, 10 Mar 2024 23:26:45 -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 20:26:00 -0700 Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by fmviesa003.fm.intel.com with ESMTP; 10 Mar 2024 20:25:57 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1710127604; x=1741663604; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=EmFbIY6Qn3mloQQLOMmHVbYM6zm0hNI5fLAvwGdEegc=; b=CaovXFTrego+dUblqRoGrPSyUyeKem1k7AQHt4E9AW+wqffiOiLPVrq7 Vp24Jhj3VYjCGHNeBc9tDbkIC6HnYX8Ij3vVMEKsDYe3F/xNXGYwPrlOr j5DAdc/RcYsM7iU8WMWrRZclfHYI5KygnNUKoqa/lJXs2mYch/sFOhoGh C2TrwPXvpvOQfpbNBj4HdtqZyNgmr9EJXuP5GiLdXdRnoa4DfcQZpH2x4 4HG1uoTU9L3qH08zU3WaFEq0cg4zEuVYyiKslQyb96Pi1HdmJ8vLSoxq0 3hAWCGkxjeBBpdA5ZmxrnkV7Cy7O3hapJVaGaUSbU9uK459qXB88Z8LAH A==; X-IronPort-AV: E=McAfee;i="6600,9927,11009"; a="22229844" X-IronPort-AV: E=Sophos;i="6.07,115,1708416000"; d="scan'208";a="22229844" X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,115,1708416000"; d="scan'208";a="15594086" 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 , "Michael S. Tsirkin" Subject: [PATCH v2 26/29] hw/virtio/vhost: Fix missing ERRP_GUARD() for error_prepend() Date: Mon, 11 Mar 2024 11:38:19 +0800 Message-Id: <20240311033822.3142585-27-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: 1710127650971100002 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]. In hw/virtio/vhost.c, there are 2 functions passing @errp to error_prepend() without ERRP_GUARD(): - vhost_save_backend_state() - vhost_load_backend_state() Their @errp both points to callers' @local_err. However, as the APIs defined in include/hw/virtio/vhost.h, it is necessary to protect their @errp with ERRP_GUARD(). To follow the requirement of @errp, add missing ERRP_GUARD() at their beginning. [1]: Issue description in the commit message of commit ae7c80a7bd73 ("error: New macro ERRP_GUARD()"). Cc: "Michael S. Tsirkin" Signed-off-by: Zhao Liu Reviewed-by: Thomas Huth --- hw/virtio/vhost.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 2c9ac794680e..2e4e040db87a 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -2199,6 +2199,7 @@ int vhost_check_device_state(struct vhost_dev *dev, E= rror **errp) =20 int vhost_save_backend_state(struct vhost_dev *dev, QEMUFile *f, Error **e= rrp) { + ERRP_GUARD(); /* Maximum chunk size in which to transfer the state */ const size_t chunk_size =3D 1 * 1024 * 1024; g_autofree void *transfer_buf =3D NULL; @@ -2291,6 +2292,7 @@ fail: =20 int vhost_load_backend_state(struct vhost_dev *dev, QEMUFile *f, Error **e= rrp) { + ERRP_GUARD(); size_t transfer_buf_size =3D 0; g_autofree void *transfer_buf =3D NULL; g_autoptr(GError) g_err =3D NULL; --=20 2.34.1