+ if (ex_data_lock == NULL) {
+ /*
+ * This can happen in normal operation when using CRYPTO_mem_leaks().
+ * The CRYPTO_mem_leaks() function calls OPENSSL_cleanup() which cleans
+ * up the locks. Subsequently the BIO that CRYPTO_mem_leaks() uses gets
+ * freed, which also attempts to free the ex_data. However
+ * CRYPTO_mem_leaks() ensures that the ex_data is freed early (i.e.
+ * before OPENSSL_cleanup() is called), so if we get here we can safely
+ * ignore this operation. We just treat it as an error.
+ */
+ return NULL;
+ }
+