Fix memory leak in tidy_repair_file()

When dealing with a file, we must free the contents if the function
fails. While here, also fix the error message because previously it
sounded like the filename was too long while in fact the file itself
is too large.

Closes phpGH-14862.

Author: ndossche

NEWS

@@ -52,6 +52,9 @@ PHP                                                                        NEWS
   . Fix 32-bit wordwrap test failures. (orlitzky)
   . Fixed bug GH-14774 (time_sleep_until overflow). (David Carlier)
 
+- Tidy:
+  . Fix memory leak in tidy_repair_file(). (nielsdos)
+
 - Treewide:
   . Fix compatibility with libxml2 2.13.2. (nielsdos)
 

ext/tidy/tests/parsing_file_too_large.phpt

@@ -47,6 +47,12 @@ try {
 } catch (\Throwable $e) {
     echo $e::class, ': ', $e->getMessage(), PHP_EOL;
 }
+
+try {
+    tidy_repair_file($path);
+} catch (\Throwable $e) {
+    echo $e::class, ': ', $e->getMessage(), PHP_EOL;
+}
 ?>
 --CLEAN--
 <?php
@@ -58,3 +64,4 @@ int(0)
 ValueError: Input string is too long
 ValueError: Input string is too long
 ValueError: Input string is too long
+ValueError: tidy_repair_file(): Argument #1 ($filename) Input string is too long

ext/tidy/tidy.c

@@ -304,7 +304,12 @@ static void php_tidy_quick_repair(INTERNAL_FUNCTION_PARAMETERS, bool is_file)
 	}
 
 	if (ZEND_SIZE_T_UINT_OVFL(ZSTR_LEN(data))) {
-		zend_argument_value_error(1, "is too long");
+		if (is_file) {
+			zend_string_release_ex(data, false);
+			zend_argument_value_error(1, "Input string is too long");
+		} else {
+			zend_argument_value_error(1, "is too long");
+		}
 		RETURN_THROWS();
 	}