From patchwork Fri Aug 14 16:02:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pan Nengyuan X-Patchwork-Id: 1344916 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; dmarc=none (p=none dis=none) header.from=huawei.com 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 4BSfs2190wz9sTH for ; Fri, 14 Aug 2020 20:32:38 +1000 (AEST) Received: from localhost ([::1]:50832 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k6X0l-0001WH-UG for incoming@patchwork.ozlabs.org; Fri, 14 Aug 2020 06:32:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50246) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k6W9i-0006wl-8K; Fri, 14 Aug 2020 05:37:46 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:4194 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k6W9f-00066R-Dc; Fri, 14 Aug 2020 05:37:45 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id AA92BFE0730BE1EFE97F; Fri, 14 Aug 2020 17:37:40 +0800 (CST) Received: from opensource.huawei.com (10.175.100.152) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Fri, 14 Aug 2020 17:37:30 +0800 From: Pan Nengyuan To: Subject: [PATCH 10/12] block/file-posix: fix a possible undefined behavior Date: Fri, 14 Aug 2020 12:02:39 -0400 Message-ID: <20200814160241.7915-11-pannengyuan@huawei.com> X-Mailer: git-send-email 2.18.2 In-Reply-To: <20200814160241.7915-1-pannengyuan@huawei.com> References: <20200814160241.7915-1-pannengyuan@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.100.152] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.190; envelope-from=pannengyuan@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/14 05:37:26 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DATE_IN_FUTURE_06_12=1.947, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_PASS=-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: Kevin Wolf , zhang.zhanghailiang@huawei.com, qemu-block@nongnu.org, Pan Nengyuan , Max Reitz , euler.robot@huawei.com, kuhn.chenqun@huawei.com, Aarushi Mehta Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" local_err is not initialized to NULL, it will cause a assert error as below: qemu/util/error.c:59: error_setv: Assertion `*errp == NULL' failed. Fixes: c6447510690 Reported-by: Euler Robot Signed-off-by: Pan Nengyuan Reviewed-by: Stefano Garzarella Reviewed-by: Kevin Wolf Reviewed-by: Li Qiang --- Cc: Kevin Wolf Cc: Max Reitz Cc: Aarushi Mehta Cc: qemu-block@nongnu.org --- block/file-posix.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/file-posix.c b/block/file-posix.c index 9a00d4190a..697a7d9eea 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -2113,7 +2113,7 @@ static void raw_aio_attach_aio_context(BlockDriverState *bs, #endif #ifdef CONFIG_LINUX_IO_URING if (s->use_linux_io_uring) { - Error *local_err; + Error *local_err = NULL; if (!aio_setup_linux_io_uring(new_context, &local_err)) { error_reportf_err(local_err, "Unable to use linux io_uring, " "falling back to thread pool: ");