check for NULL before freeing

diff --git a/ext/mcrypt/mcrypt.c b/ext/mcrypt/mcrypt.c
index 727057eff88ad52746782cd96c8f853356a41e17..4575c93cfbd3ff587b21622a679e6f0aec38c9df 100644 (file)
--- a/ext/mcrypt/mcrypt.c
+++ b/ext/mcrypt/mcrypt.c
@@ -1275,7 +1275,7 @@ int php_mcrypt_iv(php_mcrypt_iv_source source, int size, char **iv_str, int *iv_
 int php_mcrypt_func(php_mcrypt_op op, char *cipher, char *mode, char *key_str, int key_len, char *iv_str, int iv_len, char *data_str, int data_len, char **data_copy, int *data_size TSRMLS_DC)
 {
        MCRYPT td;
-       char *cipher_dir_string, *module_dir_string, *key_copy, *iv_copy;
+       char *cipher_dir_string, *module_dir_string, *key_copy, *iv_copy = NULL;
        int i, status = SUCCESS, count, *key_sizes, key_size, iv_size, block_size;
        
        MCRYPT_GET_INI
@@ -1362,7 +1362,9 @@ int php_mcrypt_func(php_mcrypt_op op, char *cipher, char *mode, char *key_str, i
        }
        
        efree(key_copy);
-       efree(iv_copy);
+       if (iv_copy) {
+               efree(iv_copy);
+       }
        
        return status;
 }