From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44809) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zr0S3-0003OZ-74 for qemu-devel@nongnu.org; Tue, 27 Oct 2015 05:21:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zr0Rz-0003gP-6f for qemu-devel@nongnu.org; Tue, 27 Oct 2015 05:21:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38972) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zr0Ry-0003g2-Uw for qemu-devel@nongnu.org; Tue, 27 Oct 2015 05:21:51 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (Postfix) with ESMTPS id 872EEA8E for ; Tue, 27 Oct 2015 09:21:50 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-116-42.ams2.redhat.com [10.36.116.42]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t9R9LmD8003895 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Tue, 27 Oct 2015 05:21:49 -0400 From: Markus Armbruster Date: Tue, 27 Oct 2015 10:21:36 +0100 Message-Id: <1445937707-22768-3-git-send-email-armbru@redhat.com> In-Reply-To: <1445937707-22768-1-git-send-email-armbru@redhat.com> References: <1445937707-22768-1-git-send-email-armbru@redhat.com> Subject: [Qemu-devel] [PULL 02/13] qbool: Make conversion from QObject * accept null List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org qobject_to_qbool() crashes on null, which is a trap for the unwary. Return null instead, and simplify a few callers. Signed-off-by: Markus Armbruster Message-Id: <1444918537-18107-3-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake Reviewed-by: Luiz Capitulino --- qapi/qmp-input-visitor.c | 6 +++--- qobject/qbool.c | 4 ++-- qobject/qdict.c | 11 +++-------- 3 files changed, 8 insertions(+), 13 deletions(-) diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c index 5dd9ed5..f32ce81 100644 --- a/qapi/qmp-input-visitor.c +++ b/qapi/qmp-input-visitor.c @@ -240,15 +240,15 @@ static void qmp_input_type_bool(Visitor *v, bool *obj, const char *name, Error **errp) { QmpInputVisitor *qiv = to_qiv(v); - QObject *qobj = qmp_input_get_object(qiv, name, true); + QBool *qbool = qobject_to_qbool(qmp_input_get_object(qiv, name, true)); - if (!qobj || qobject_type(qobj) != QTYPE_QBOOL) { + if (!qbool) { error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", "boolean"); return; } - *obj = qbool_get_bool(qobject_to_qbool(qobj)); + *obj = qbool_get_bool(qbool); } static void qmp_input_type_str(Visitor *v, char **obj, const char *name, diff --git a/qobject/qbool.c b/qobject/qbool.c index 5ff69f0..bc6535f 100644 --- a/qobject/qbool.c +++ b/qobject/qbool.c @@ -51,9 +51,9 @@ bool qbool_get_bool(const QBool *qb) */ QBool *qobject_to_qbool(const QObject *obj) { - if (qobject_type(obj) != QTYPE_QBOOL) + if (!obj || qobject_type(obj) != QTYPE_QBOOL) { return NULL; - + } return container_of(obj, QBool, base); } diff --git a/qobject/qdict.c b/qobject/qdict.c index 67b1a58..f179f4e 100644 --- a/qobject/qdict.c +++ b/qobject/qdict.c @@ -243,8 +243,7 @@ int64_t qdict_get_int(const QDict *qdict, const char *key) */ bool qdict_get_bool(const QDict *qdict, const char *key) { - QObject *obj = qdict_get_obj(qdict, key, QTYPE_QBOOL); - return qbool_get_bool(qobject_to_qbool(obj)); + return qbool_get_bool(qobject_to_qbool(qdict_get(qdict, key))); } /** @@ -316,13 +315,9 @@ int64_t qdict_get_try_int(const QDict *qdict, const char *key, */ bool qdict_get_try_bool(const QDict *qdict, const char *key, bool def_value) { - QObject *obj; + QBool *qbool = qobject_to_qbool(qdict_get(qdict, key)); - obj = qdict_get(qdict, key); - if (!obj || qobject_type(obj) != QTYPE_QBOOL) - return def_value; - - return qbool_get_bool(qobject_to_qbool(obj)); + return qbool ? qbool_get_bool(qbool) : def_value; } /** -- 2.4.3