From nobody Tue Feb 10 11:15:44 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1763787276404617.2560720501398; Fri, 21 Nov 2025 20:54:36 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vMcxP-0002ZM-ML; Fri, 21 Nov 2025 21:02:36 -0500 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 1vMcAp-00072p-1k; Fri, 21 Nov 2025 20:12:23 -0500 Received: from isrv.corpit.ru ([212.248.84.144]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vMcAe-0004sN-7E; Fri, 21 Nov 2025 20:12:19 -0500 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id A29A516CA67; Fri, 21 Nov 2025 21:44:25 +0300 (MSK) Received: from think4mjt.tls.msk.ru (mjtthink.wg.tls.msk.ru [192.168.177.146]) by tsrv.corpit.ru (Postfix) with ESMTP id 6204D321CA3; Fri, 21 Nov 2025 21:44:34 +0300 (MSK) From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Akihiko Odaki , Kevin Wolf , Michael Tokarev Subject: [Stable-10.0.7 44/81] qemu-img: Fix amend option parse error handling Date: Fri, 21 Nov 2025 21:43:43 +0300 Message-ID: <20251121184424.1137669-44-mjt@tls.msk.ru> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: 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: pass client-ip=212.248.84.144; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru 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-ZM-MESSAGEID: 1763787277739018900 Content-Type: text/plain; charset="utf-8" From: Akihiko Odaki qemu_opts_del(opts) dereferences opts->list, which is the old amend_opts pointer that can be dangling after executing qemu_opts_append(amend_opts, bs->drv->create_opts) and cause use-after-free. Fix the potential use-after-free by moving the qemu_opts_del() call before the qemu_opts_append() call. Signed-off-by: Akihiko Odaki Message-ID: <20251023-iotests-v1-1-fab143ca4c2f@rsg.ci.i.u-tokyo.ac.jp> Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf (cherry picked from commit f00bcc833790c72c08bc5eed97845fdaa7542507) Signed-off-by: Michael Tokarev diff --git a/qemu-img.c b/qemu-img.c index 2044c22a4c..d1d8242b02 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -4369,9 +4369,9 @@ static int img_amend(int argc, char **argv) amend_opts =3D qemu_opts_append(amend_opts, bs->drv->amend_opts); opts =3D qemu_opts_create(amend_opts, NULL, 0, &error_abort); if (!qemu_opts_do_parse(opts, options, NULL, &err)) { + qemu_opts_del(opts); /* Try to parse options using the create options */ amend_opts =3D qemu_opts_append(amend_opts, bs->drv->create_opts); - qemu_opts_del(opts); opts =3D qemu_opts_create(amend_opts, NULL, 0, &error_abort); if (qemu_opts_do_parse(opts, options, NULL, NULL)) { error_append_hint(&err, --=20 2.47.3