From b69b841fa3d3f6f029f2d6f8b8736fb58319466c Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Fri, 11 May 2018 16:15:16 +0200
Subject: [PATCH] Prevent huge memory allocation for Damerau-Levenshtein algo

---
 application/argumentparser.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/application/argumentparser.cpp b/application/argumentparser.cpp
index 6415aaa..7f3e351 100644
--- a/application/argumentparser.cpp
+++ b/application/argumentparser.cpp
@@ -1209,6 +1209,10 @@ string ArgumentParser::findSuggestions(int argc, const char *const *argv, unsign
     // determine the unknown/misspelled argument
     const auto *unknownArg(*reader.argv);
     auto unknownArgSize(strlen(unknownArg));
+    // -> refuse suggestions for long args to prevent huge memory allocation for Damerau-Levenshtein algo
+    if (unknownArgSize > 16) {
+        return string();
+    }
     // -> remove dashes since argument names internally don't have them
     if (unknownArgSize >= 2 && unknownArg[0] == '-' && unknownArg[1] == '-') {
         unknownArg += 2;