1 files changed, 53 insertions, 0 deletions
diff --git a/t/bad_pointers_t.c b/t/bad_pointers_t.c
new file mode 100644
index 0000000..ab6db48
--- /dev/null
+++ b/t/bad_pointers_t.c
@@ -0,0 +1,53 @@
+#include "maxminddb_test_helper.h"
+
+void run_tests(int mode, const char *mode_desc)
+{
+    const char *filename = "MaxMind-DB-test-broken-pointers-24.mmdb";
+    const char *path = test_database_path(filename);
+    MMDB_s *mmdb = open_ok(path, mode, mode_desc);
+    free((void *)path);
+
+    {
+        const char *ip = "1.1.1.16";
+        MMDB_lookup_result_s result =
+            lookup_string_ok(mmdb, ip, filename, mode_desc);
+
+        MMDB_entry_data_s entry_data;
+        int status = MMDB_get_value(&result.entry, &entry_data, NULL);
+
+        cmp_ok(
+            status, "==", MMDB_INVALID_DATA_ERROR,
+            "MMDB_get_value returns MMDB_INVALID_DATA_ERROR for bad pointer in data section");
+
+        MMDB_entry_data_list_s *entry_data_list;
+        status = MMDB_get_entry_data_list(&result.entry, &entry_data_list);
+
+        cmp_ok(
+            status, "==", MMDB_INVALID_DATA_ERROR,
+            "MMDB_get_entry_data_list returns MMDB_INVALID_DATA_ERROR for bad pointer in data section");
+
+        MMDB_free_entry_data_list(entry_data_list);
+    }
+
+    {
+        const char *ip = "1.1.1.32";
+
+        int gai_error, mmdb_error;
+        MMDB_lookup_result_s UNUSED(result) =
+            MMDB_lookup_string(mmdb, ip, &gai_error, &mmdb_error);
+
+        cmp_ok(
+            mmdb_error, "==", MMDB_CORRUPT_SEARCH_TREE_ERROR,
+            "MMDB_lookup_string sets mmdb_error to MMDB_CORRUPT_SEARCH_TREE_ERROR when a search tree record points outside the data section");
+    }
+
+    MMDB_close(mmdb);
+    free(mmdb);
+}
+
+int main(void)
+{
+    plan(NO_PLAN);
+    for_all_modes(&run_tests);
+    done_testing();
+}