[libvirt] [python PATCH] fix crash in getAllDomainStats

Commits 1d39dbaf and 827ed9b4 broke the libvirt-python API by removing virDomainRef() and virDomainFree(). virDomainStatsRecordListFree() will free that domain pointer and later when virDomain (python object) call its destructor and tries to free that same pointer again. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1326839 Signed-off-by: Pavel Hrdina <phrdina@redhat.com> --- libvirt-override.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/libvirt-override.c b/libvirt-override.c index 4640ed5..2de95ce 100644 --- a/libvirt-override.c +++ b/libvirt-override.c @@ -8381,6 +8381,7 @@ convertDomainStatsRecord(virDomainStatsRecordPtr *records, PyObject *py_retval; PyObject *py_record; PyObject *py_record_stats = NULL; + virDomainPtr dom = NULL; size_t i; if (!(py_retval = PyList_New(nrecords))) @@ -8392,9 +8393,12 @@ convertDomainStatsRecord(virDomainStatsRecordPtr *records, VIR_PY_LIST_SET_GOTO(py_retval, i, py_record, error); + dom = records[i]->dom; + virDomainRef(dom); VIR_PY_TUPLE_SET_GOTO(py_record, 0, - libvirt_virDomainPtrWrap(records[i]->dom), + libvirt_virDomainPtrWrap(dom), error); + dom = NULL; if (!(py_record_stats = getPyVirTypedParameter(records[i]->params, records[i]->nparams))) @@ -8406,6 +8410,8 @@ convertDomainStatsRecord(virDomainStatsRecordPtr *records, return py_retval; error: + if (dom) + virDomainFree(dom); Py_XDECREF(py_retval); return NULL; } -- 2.8.1

On Mon, Apr 18, 2016 at 17:07:48 +0200, Pavel Hrdina wrote:
Commits 1d39dbaf and 827ed9b4 broke the libvirt-python API by removing virDomainRef() and virDomainFree(). virDomainStatsRecordListFree() will free that domain pointer and later when virDomain (python object) call its destructor and tries to free that same pointer again.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1326839
Signed-off-by: Pavel Hrdina <phrdina@redhat.com> --- libvirt-override.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
ACK
participants (2)
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Pavel Hrdina
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Peter Krempa