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From 378ef5e438a2f5af7a50374d2bd23bdd3403201f Mon Sep 17 00:00:00 2001
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From: Evgeny Kolesnikov <ekolesni@redhat.com>
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Date: Tue, 4 May 2021 08:41:06 +0200
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Subject: [PATCH] Fix covscan-reported issues in yamlfilecontent probe and
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schematron
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Error: FORWARD_NULL (CWE-476): [#def1]
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/OVAL/probes/independent/yamlfilecontent_probe.c:392: var_compare_op: Comparing "yaml_file" to null implies that "yaml_file" might be null.
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/OVAL/probes/independent/yamlfilecontent_probe.c:417: var_deref_model: Passing null pointer "yaml_file" to "fclose", which dereferences it.
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# 416| cleanup:
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# 417|-> fclose(yaml_file);
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# 418| yaml_parser_delete(&parser);
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Error: RESOURCE_LEAK (CWE-772): [#def2] [important]
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/source/schematron.c:549: alloc_fn: Storage is returned from allocation function "xmlXPathNodeEval".
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/source/schematron.c:549: var_assign: Assigning: "component_refs" = storage returned from "xmlXPathNodeEval(data_stream_node, (xmlChar *)"ds:checklists/ds:component-ref", context)".
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/source/schematron.c:551: leaked_storage: Variable "component_refs" going out of scope leaks the storage it points to.
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# 550| if (component_refs == NULL || component_refs->nodesetval == NULL) {
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# 551|-> return res;
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# 552| }
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---
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src/OVAL/probes/independent/yamlfilecontent_probe.c | 3 ++-
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src/source/schematron.c | 2 ++
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2 files changed, 4 insertions(+), 1 deletion(-)
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diff --git a/src/OVAL/probes/independent/yamlfilecontent_probe.c b/src/OVAL/probes/independent/yamlfilecontent_probe.c
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index ed5ce0d68..62a8f4ff2 100644
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--- a/src/OVAL/probes/independent/yamlfilecontent_probe.c
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+++ b/src/OVAL/probes/independent/yamlfilecontent_probe.c
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@@ -414,7 +414,8 @@ static int process_yaml_file(const char *prefix, const char *path, const char *f
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}
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cleanup:
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- fclose(yaml_file);
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+ if (yaml_file != NULL)
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+ fclose(yaml_file);
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yaml_parser_delete(&parser);
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free(filepath_with_prefix);
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free(filepath);
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diff --git a/src/source/schematron.c b/src/source/schematron.c
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index 6cb22658b..c32d5aed6 100644
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--- a/src/source/schematron.c
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+++ b/src/source/schematron.c
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@@ -548,6 +548,8 @@ static bool _req_src_346_1_sub1(xmlNodePtr data_stream_node, xmlXPathContextPtr
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/* every $m in ds:checklists/ds:component-ref satisfies ... */
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xmlXPathObjectPtr component_refs = xmlXPathNodeEval(data_stream_node, BAD_CAST "ds:checklists/ds:component-ref", context);
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if (component_refs == NULL || component_refs->nodesetval == NULL) {
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+ if (component_refs != NULL)
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+ xmlXPathFreeObject(component_refs);
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return res;
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}
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for (int i = 0; i < component_refs->nodesetval->nodeNr; i++) {
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