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From a7ce80a013f2a08cb1ac4aac368f2250eea03ebf Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Sun, 11 Sep 2022 19:34:33 +0200
Subject: [PATCH 1/2] tests: Cover heap use-after-free issue in doContent
---
tests/runtests.c | 74 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/tests/runtests.c b/tests/runtests.c
index ea371b42f..ab3aff65b 100644
--- a/tests/runtests.c
+++ b/tests/runtests.c
@@ -4990,6 +4990,78 @@ START_TEST(test_suspend_resume_internal_entity) {
}
END_TEST
+void
+suspending_comment_handler(void *userData, const XML_Char *data) {
+ UNUSED_P(data);
+ XML_Parser parser = (XML_Parser)userData;
+ XML_StopParser(parser, XML_TRUE);
+}
+
+START_TEST(test_suspend_resume_internal_entity_issue_629) {
+ const char *const text
+ = "<!DOCTYPE a [<!ENTITY e '<!--COMMENT-->a'>]><a>&e;<b>\n"
+ "<"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "/>"
+ "</b></a>";
+ const size_t firstChunkSizeBytes = 54;
+
+ XML_Parser parser = XML_ParserCreate(NULL);
+ XML_SetUserData(parser, parser);
+ XML_SetCommentHandler(parser, suspending_comment_handler);
+
+ if (XML_Parse(parser, text, (int)firstChunkSizeBytes, XML_FALSE)
+ != XML_STATUS_SUSPENDED)
+ xml_failure(parser);
+ if (XML_ResumeParser(parser) != XML_STATUS_OK)
+ xml_failure(parser);
+ if (XML_Parse(parser, text + firstChunkSizeBytes,
+ (int)(strlen(text) - firstChunkSizeBytes), XML_TRUE)
+ != XML_STATUS_OK)
+ xml_failure(parser);
+ XML_ParserFree(parser);
+}
+END_TEST
+
/* Test syntax error is caught at parse resumption */
START_TEST(test_resume_entity_with_syntax_error) {
const char *text = "<!DOCTYPE doc [\n"
@@ -12016,6 +12088,8 @@ make_suite(void) {
tcase_add_test(tc_basic, test_partial_char_in_epilog);
tcase_add_test(tc_basic, test_hash_collision);
tcase_add_test__ifdef_xml_dtd(tc_basic, test_suspend_resume_internal_entity);
+ tcase_add_test__ifdef_xml_dtd(tc_basic,
+ test_suspend_resume_internal_entity_issue_629);
tcase_add_test__ifdef_xml_dtd(tc_basic, test_resume_entity_with_syntax_error);
tcase_add_test__ifdef_xml_dtd(tc_basic, test_suspend_resume_parameter_entity);
tcase_add_test(tc_basic, test_restart_on_error);
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