cpp/openttd-patchpack/source Changeset - r16028:f7cfe78e8c66

Changeset - r16028:f7cfe78e8c66

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yexo - 14 years ago 2010-09-03 23:04:02
yexo@openttd.org

(svn r20731) -Fix (r20739): SmallVector did not have an assignment operator, causing invalid memory reads / double free

2 files changed with 10 insertions and 2 deletions:

src/core/smallvec_type.hpp

src/landscape.cpp

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src/core/smallvec_type.hpp

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@@ @@ -36,12 +36,20 @@ protected: @@
 public:
 	SmallVector() : data(NULL), items(0), capacity(0) { }
 	template<uint X>
+	template <uint X>
 	SmallVector(const SmallVector<T, X> &other) : data(NULL), items(0), capacity(0)
+	{
 		MemCpyT<T>(this->Append(other.Length()), other.Begin(), other.Length());
+	}
 	template <uint X>
 	SmallVector &operator=(const SmallVector<T, X> &other)
+	{
 		this->Reset();
 		MemCpyT<T>(this->Append(other.Length()), other.Begin(), other.Length());
 		return *this;
+	}
 	~SmallVector()
+	{
 		free(this->data);

src/landscape.cpp

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@@ @@ -638,7 +638,7 @@ CommandCost CmdClearArea(TileIndex tile, @@
 	for (int x = sx; x <= ex; ++x) {
 		for (int y = sy; y <= ey; ++y) {
-			SmallVector<TileArea, 1> object_areas = _cleared_object_areas;
+			SmallVector<TileArea, 1> object_areas(_cleared_object_areas);
 			CommandCost ret = DoCommand(TileXY(x, y), 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR);
 			_cleared_object_areas = object_areas;
 			if (ret.Failed()) {

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