[libvirt] [PATCH] python: Avoid memory leaks on libvirt_virNodeGetMemoryStats
From: Alex Jia <ajia(a)redhat.com>
Detected by valgrind. Leaks are introduced in commit 17c7795.
* python/libvirt-override.c (libvirt_virNodeGetMemoryStats): fix memory leaks
and improve codes return value.
For details, please see the following link:
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=770944
Signed-off-by: Alex Jia <ajia(a)redhat.com>
---
python/libvirt-override.c | 41 ++++++++++++++++++++++++++++++-----------
1 files changed, 30 insertions(+), 11 deletions(-)
diff --git a/python/libvirt-override.c b/python/libvirt-override.c
index 4e8a97e..ecb11ea 100644
--- a/python/libvirt-override.c
+++ b/python/libvirt-override.c
@@ -2426,7 +2426,9 @@ libvirt_virNodeGetCPUStats(PyObject *self ATTRIBUTE_UNUSED, PyObject
*args)
static PyObject *
libvirt_virNodeGetMemoryStats(PyObject *self ATTRIBUTE_UNUSED, PyObject *args)
{
- PyObject *ret;
+ PyObject *info, *ret;
+ PyObject *key = NULL;
+ PyObject *val = NULL;
PyObject *pyobj_conn;
virConnectPtr conn;
unsigned int flags;
@@ -2446,28 +2448,45 @@ libvirt_virNodeGetMemoryStats(PyObject *self ATTRIBUTE_UNUSED,
PyObject *args)
if (nparams) {
if (VIR_ALLOC_N(stats, nparams) < 0)
- return VIR_PY_NONE;
+ return PyErr_NoMemory();
LIBVIRT_BEGIN_ALLOW_THREADS;
c_retval = virNodeGetMemoryStats(conn, cellNum, stats, &nparams, flags);
LIBVIRT_END_ALLOW_THREADS;
if (c_retval < 0) {
- VIR_FREE(stats);
- return VIR_PY_NONE;
+ ret = VIR_PY_NONE;
+ goto cleanup;
}
}
- if (!(ret = PyDict_New())) {
- VIR_FREE(stats);
- return VIR_PY_NONE;
+ if (!(info = PyDict_New())) {
+ ret = VIR_PY_NONE;
+ goto cleanup;
}
+
for (i = 0; i < nparams; i++) {
- PyDict_SetItem(ret,
- libvirt_constcharPtrWrap(stats[i].field),
- libvirt_ulonglongWrap(stats[i].value));
+ key = libvirt_constcharPtrWrap(stats[i].field);
+ val = libvirt_ulonglongWrap(stats[i].value);
+
+ if (!key || !val)
+ goto cleanup;
+
+ if (PyDict_SetItem(info, key, val) < 0) {
+ Py_DECREF(info);
+ goto cleanup;
+ }
+
+ Py_DECREF(key);
+ Py_DECREF(val);
}
VIR_FREE(stats);
- return ret;
+ return info;
+
+cleanup:
+ VIR_FREE(stats);
+ Py_XDECREF(key);
+ Py_XDECREF(val);
+ return NULL;
}
static PyObject *
--
1.7.1