From patchwork Fri May 14 16:31:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 1478591 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=ZK1x8XHj; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4FhYyG6WHSz9sVb for ; Sat, 15 May 2021 02:34:14 +1000 (AEST) Received: from localhost ([::1]:52908 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lhalQ-0000R4-Rq for incoming@patchwork.ozlabs.org; Fri, 14 May 2021 12:34:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54860) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lhaje-0000Jw-3q for qemu-devel@nongnu.org; Fri, 14 May 2021 12:32:22 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:57207) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lhajM-0001Bw-AX for qemu-devel@nongnu.org; Fri, 14 May 2021 12:32:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1621009922; 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: in-reply-to:in-reply-to:references:references; bh=+t0FGQHYG9Xi31mZVLx0tcdun4HJx/zhy2NGPDu3pRA=; b=ZK1x8XHjxdF8OgxEAQcruCS9M+4MQZL4OdZ/tMs5vSahH/qz+PYg0JEjzZ0c474UW3y6Sq 2hKS831kbR6RHUoQB6kU1Ws7yg6ht1OqRDAN2UV6zqO3QDLla3+mtFD+1TCAarKesS3GpL +8RqA/ZsSzXSsil3ZUXWyU1kB+5gFOw= 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-264-HDS0CE23Mx-ZNf6Ooa2Idw-1; Fri, 14 May 2021 12:31:58 -0400 X-MC-Unique: HDS0CE23Mx-ZNf6Ooa2Idw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B34C31009446; Fri, 14 May 2021 16:31:57 +0000 (UTC) Received: from merkur.redhat.com (ovpn-114-116.ams2.redhat.com [10.36.114.116]) by smtp.corp.redhat.com (Postfix) with ESMTP id C175C19D9B; Fri, 14 May 2021 16:31:56 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PULL 02/14] block: Fix Transaction leak in bdrv_root_attach_child() Date: Fri, 14 May 2021 18:31:12 +0200 Message-Id: <20210514163124.251741-3-kwolf@redhat.com> In-Reply-To: <20210514163124.251741-1-kwolf@redhat.com> References: <20210514163124.251741-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=170.10.133.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.699, 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=unavailable 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: kwolf@redhat.com, peter.maydell@linaro.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The error path needs to call tran_finalize(), too. Fixes: CID 1452773 Fixes: 548a74c0dbc858edd1a7ee3045b5f2fe710bd8b1 Signed-off-by: Kevin Wolf Message-Id: <20210503110555.24001-2-kwolf@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Max Reitz Signed-off-by: Kevin Wolf --- block.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/block.c b/block.c index 9ad725d205..c411e8a5c6 100644 --- a/block.c +++ b/block.c @@ -2917,13 +2917,14 @@ BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs, child_role, perm, shared_perm, opaque, &child, tran, errp); if (ret < 0) { - bdrv_unref(child_bs); - return NULL; + assert(child == NULL); + goto out; } ret = bdrv_refresh_perms(child_bs, errp); - tran_finalize(tran, ret); +out: + tran_finalize(tran, ret); bdrv_unref(child_bs); return child; }