Fix integer overflow.

Prevent line count from exceeding maximum value in SourceData::FileData::preprocess

Fix integer overflow.
Prevent line count from exceeding maximum value in SourceData::FileData::preprocess
a460a6a6 · Michael Reeves · 27f9f7e2 · a460a6a6
Commit a460a6a6 authored Apr 07, 2019 by Michael Reeves
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SourceData.cpp src/SourceData.cpp +3 -0

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--- a/src/SourceData.cpp
+++ b/src/SourceData.cpp
@@ -597,6 +597,9 @@ bool SourceData::FileData::preprocess(bool bPreserveCR, QTextCodec* pEncoding)
    {
        if(i >= ucSize || p[i] == '\n')
        {
+            if(lines >= INT_MAX - 5)
+                return false;
+
            ++lines;
        }
        if(p[i].isNull())