From patchwork Mon Jan 25 13:26:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 12043407 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F032C433E0 for ; Mon, 25 Jan 2021 13:28:53 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id A519A206E9 for ; Mon, 25 Jan 2021 13:28:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A519A206E9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37172 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l41vH-0004LF-D5 for qemu-devel@archiver.kernel.org; Mon, 25 Jan 2021 08:28:51 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40042) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l41tc-0003VC-Bd for qemu-devel@nongnu.org; Mon, 25 Jan 2021 08:27:09 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:31254) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1l41tE-00019t-9X for qemu-devel@nongnu.org; Mon, 25 Jan 2021 08:27:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611581199; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=p6di9iKNOUKAkPfwCF6qlxTpwF41usl7ZzwpFioWevU=; b=HGMUtbP1I9FJn/hXviqS1qq2CMoLjsqdYbcWBHCYsv786aTqYfpXVq44Ae6ZebzVJiuV2h XeQFKqzPNHiIV4JK7k/s5v5lwqxoJg3TddYkDXtIy8Sql45y7YpJuaUV8DEeyiCgwhyRM8 ajNJS/UHnR/+JWFqttmR1ZMwYOK99Gs= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-582-TpHlV262PFuzkAR_GkWYvw-1; Mon, 25 Jan 2021 08:26:37 -0500 X-MC-Unique: TpHlV262PFuzkAR_GkWYvw-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 05DB0107ACE6; Mon, 25 Jan 2021 13:26:37 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-113-224.ams2.redhat.com [10.36.113.224]) by smtp.corp.redhat.com (Postfix) with ESMTPS id CDA2F4D; Mon, 25 Jan 2021 13:26:36 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 36D2F113865F; Mon, 25 Jan 2021 14:26:35 +0100 (CET) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PATCH] error: Fix "Converting to ERRP_GUARD()" doc on "valid at return" Date: Mon, 25 Jan 2021 14:26:35 +0100 Message-Id: <20210125132635.1253219-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=armbru@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.255, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vsementsov@virtuozzo.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Setting errp = NULL is wrong: the automatic error propagation still propagates the dangling pointer _auto_errp_prop.local_err. We need to set *errp = NULL to clear the dangling pointer. Signed-off-by: Markus Armbruster Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Philippe Mathieu-Daudé --- include/qapi/error.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/qapi/error.h b/include/qapi/error.h index eaa05c4837..4a9260b0cc 100644 --- a/include/qapi/error.h +++ b/include/qapi/error.h @@ -235,7 +235,7 @@ * error_propagate_prepend(errp, *errp, ...) by error_prepend(errp, ...) * * 4. Ensure @errp is valid at return: when you destroy *errp, set - * errp = NULL. + * *errp = NULL. * * Example: *