From nobody Thu May 2 07:26:42 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1528708849610944.32411247184; Mon, 11 Jun 2018 02:20:49 -0700 (PDT) Received: from localhost ([::1]:47298 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fSJ06-0004Gm-Hc for importer@patchew.org; Mon, 11 Jun 2018 05:20:34 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37840) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fSIz7-0003nn-5R for qemu-devel@nongnu.org; Mon, 11 Jun 2018 05:19:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fSIz6-0006L0-F1 for qemu-devel@nongnu.org; Mon, 11 Jun 2018 05:19:33 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:2275 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fSIz1-0006Ji-75; Mon, 11 Jun 2018 05:19:27 -0400 Received: from DGGEML402-HUB.china.huawei.com (unknown [172.30.72.53]) by Forcepoint Email with ESMTP id 088F3B37508FF; Mon, 11 Jun 2018 17:19:17 +0800 (CST) Received: from localhost.localdomain (10.175.104.211) by DGGEML402-HUB.china.huawei.com (10.3.17.38) with Microsoft SMTP Server id 14.3.382.0; Mon, 11 Jun 2018 17:18:25 +0800 From: Jie Wang To: , Date: Mon, 11 Jun 2018 15:04:07 +0800 Message-ID: <1528700647-58638-1-git-send-email-wangjie88@huawei.com> X-Mailer: git-send-email 1.8.3.1 MIME-Version: 1.0 X-Originating-IP: [10.175.104.211] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 45.249.212.189 Subject: [Qemu-devel] [PATCH] util/async: avoid NULL pointer dereference X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: famz@redhat.com, eric.fangyi@huawei.com, stefanha@redhat.com, wangjie88@huawei.com, wu.wubin@huawei.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" if laio_init create linux_aio failed and return NULL, NULL pointer dereference will occur when laio_attach_aio_context dereference linux_aio in aio_get_linux_aio, so add assert to avoid it. Signed-off-by: Jie Wang --- util/async.c | 1 + 1 file changed, 1 insertion(+) diff --git a/util/async.c b/util/async.c index 03f62787f2..7766bcd8bc 100644 --- a/util/async.c +++ b/util/async.c @@ -327,6 +327,7 @@ LinuxAioState *aio_get_linux_aio(AioContext *ctx) { if (!ctx->linux_aio) { ctx->linux_aio =3D laio_init(); + assert(ctx->linux_aio); laio_attach_aio_context(ctx->linux_aio, ctx); } return ctx->linux_aio; --=20 2.15.0.windows.1