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From 08a2ab563571018ea8c4eb0ac34acc9f4913c714 Mon Sep 17 00:00:00 2001
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Message-Id: <08a2ab563571018ea8c4eb0ac34acc9f4913c714@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Tue, 10 Jul 2018 17:41:11 +0200
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Subject: [PATCH] qemu: monitor: Make qemuMonitorAddObject more robust against
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programming errors
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Document and check that @props contains a pointer to a json object and
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check that both necessary fields are present. Also mark @props as
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NONNULL.
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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(cherry picked from commit fac0dacd54c02b842c995d0999d9450d09d1e7cd)
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https: //bugzilla.redhat.com/show_bug.cgi?id=1598015
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/qemu/qemu_monitor.c | 23 +++++++++++++++++------
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src/qemu/qemu_monitor.h | 3 ++-
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2 files changed, 19 insertions(+), 7 deletions(-)
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diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
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index 6ed475ede0..ae5b23b9fc 100644
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--- a/src/qemu/qemu_monitor.c
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+++ b/src/qemu/qemu_monitor.c
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@@ -3073,8 +3073,9 @@ qemuMonitorCreateObjectProps(virJSONValuePtr *propsret,
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/**
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* qemuMonitorAddObject:
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* @mon: Pointer to monitor object
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- * @props: Optional arguments for the given type. The object is consumed and
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- * the pointer is cleared.
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+ * @props: Pointer to a JSON object holding configuration of the object to add.
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+ * The object must be non-null and contain at least the "qom-type" and
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+ * "id" field. The object is consumed and the pointer is cleared.
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* @alias: If not NULL, returns the alias of the added object if it was added
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* successfully to qemu. Caller should free the returned pointer.
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*
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@@ -3085,18 +3086,28 @@ qemuMonitorAddObject(qemuMonitorPtr mon,
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virJSONValuePtr *props,
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char **alias)
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{
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- const char *type = virJSONValueObjectGetString(*props, "qom-type");
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- const char *id = virJSONValueObjectGetString(*props, "id");
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+ const char *type = NULL;
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+ const char *id = NULL;
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char *tmp = NULL;
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int ret = -1;
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+ if (!*props) {
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+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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+ _("object props can't be NULL"));
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+ goto cleanup;
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+ }
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+
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+ type = virJSONValueObjectGetString(*props, "qom-type");
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+ id = virJSONValueObjectGetString(*props, "id");
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+
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VIR_DEBUG("type=%s id=%s", NULLSTR(type), NULLSTR(id));
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QEMU_CHECK_MONITOR_GOTO(mon, cleanup);
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- if (!id) {
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+ if (!id || !type) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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- _("missing alias for qemu object '%s'"), NULLSTR(type));
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+ _("missing alias or qom-type for qemu object '%s'"),
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+ NULLSTR(type));
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goto cleanup;
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}
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diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
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index b3d62324b4..e8adda8aa0 100644
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--- a/src/qemu/qemu_monitor.h
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+++ b/src/qemu/qemu_monitor.h
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@@ -812,7 +812,8 @@ int qemuMonitorCreateObjectProps(virJSONValuePtr *propsret,
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int qemuMonitorAddObject(qemuMonitorPtr mon,
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virJSONValuePtr *props,
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- char **alias);
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+ char **alias)
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+ ATTRIBUTE_NONNULL(1);
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int qemuMonitorDelObject(qemuMonitorPtr mon,
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const char *objalias);
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--
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2.18.0
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