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Fix UB in CreateVectorOfStructs in case of an empty vector: avoid calling memcpy in this case (#6726)

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Daniil Nikolenko
2021-07-08 23:40:53 +03:00
committed by GitHub
parent 8f8196e136
commit bf3470c161
1 changed files with 3 additions and 1 deletions
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4
include/flatbuffers/flatbuffers.h
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@@ -1914,7 +1914,9 @@ class FlatBufferBuilder {
template<typename T> template<typename T>
Offset<Vector<const T *>> CreateVectorOfStructs(const T *v, size_t len) { Offset<Vector<const T *>> CreateVectorOfStructs(const T *v, size_t len) {
StartVector(len * sizeof(T) / AlignOf<T>(), AlignOf<T>()); StartVector(len * sizeof(T) / AlignOf<T>(), AlignOf<T>());
PushBytes(reinterpret_cast<const uint8_t *>(v), sizeof(T) * len); if (len > 0) {
PushBytes(reinterpret_cast<const uint8_t *>(v), sizeof(T) * len);
}
return Offset<Vector<const T *>>(EndVector(len)); return Offset<Vector<const T *>>(EndVector(len));
} }