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virSecurityDeviceLabelDefParseXML: Use automatic memory clearing for temp strings

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Apart from code simplification the refactor of 'model' fixes an unlikely
memory leak of the string if a duplicate model is found.

While the coversion of 'label' variable may seem unnecessary it will
come in handy in the next patch.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2021-11-22 17:34:36 +01:00
parent a0e84f21b2
commit 33f2cc0712
1 changed files with 8 additions and 7 deletions
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15
src/conf/domain_conf.c
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@ -8014,7 +8014,6 @@ virSecurityDeviceLabelDefParseXML(virSecurityDeviceLabelDef ***seclabels_rtn,
size_t nseclabels = 0;
int n;
size_t i, j;
char *model, *relabel, *label, *labelskip;
g_autofree xmlNodePtr *list = NULL;
if ((n = virXPathNodeSet("./seclabel", ctxt, &list)) < 0)
@ -8028,6 +8027,11 @@ virSecurityDeviceLabelDefParseXML(virSecurityDeviceLabelDef ***seclabels_rtn,
seclabels[i] = g_new0(virSecurityDeviceLabelDef, 1);
for (i = 0; i < n; i++) {
g_autofree char *model = NULL;
g_autofree char *relabel = NULL;
g_autofree char *label = NULL;
g_autofree char *labelskip = NULL;
/* get model associated to this override */
model = virXMLPropString(list[i], "model");
if (model) {
@ -8039,7 +8043,7 @@ virSecurityDeviceLabelDefParseXML(virSecurityDeviceLabelDef ***seclabels_rtn,
goto error;
}
}
seclabels[i]->model = model;
seclabels[i]->model = g_steal_pointer(&model);
}
relabel = virXMLPropString(list[i], "relabel");
@ -8048,10 +8052,8 @@ virSecurityDeviceLabelDefParseXML(virSecurityDeviceLabelDef ***seclabels_rtn,
virReportError(VIR_ERR_XML_ERROR,
_("invalid security relabel value %s"),
relabel);
VIR_FREE(relabel);
goto error;
}
VIR_FREE(relabel);
} else {
seclabels[i]->relabel = true;
}
@ -8061,14 +8063,13 @@ virSecurityDeviceLabelDefParseXML(virSecurityDeviceLabelDef ***seclabels_rtn,
seclabels[i]->labelskip = false;
if (labelskip && !(flags & VIR_DOMAIN_DEF_PARSE_INACTIVE))
ignore_value(virStringParseYesNo(labelskip, &seclabels[i]->labelskip));
VIR_FREE(labelskip);
ctxt->node = list[i];
label = virXPathStringLimit("string(./label)",
VIR_SECURITY_LABEL_BUFLEN-1, ctxt);
seclabels[i]->label = label;
seclabels[i]->label = g_steal_pointer(&label);
if (label && !seclabels[i]->relabel) {
if (seclabels[i]->label && !seclabels[i]->relabel) {
virReportError(VIR_ERR_XML_ERROR,
_("Cannot specify a label if relabelling is "
"turned off. model=%s"),