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Double free when accessing .AsBoxed() on Pod with 0 refcount #7659

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merged 2 commits into from
Aug 12, 2024
Merged

Double free when accessing .AsBoxed() on Pod with 0 refcount #7659

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4e3750f
Double free when accessing .AsBoxed() on Pod with 0 refcount
MrLolthe1st Aug 12, 2024
ecc56d7
fix build
MrLolthe1st Aug 12, 2024
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2 changes: 1 addition & 1 deletion ydb/library/yql/parser/pg_wrapper/utils.h
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Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,7 @@ inline NKikimr::NUdf::TUnboxedValuePod AnyDatumToPod(Datum datum, bool passByVal
}

inline Datum PointerDatumFromPod(const NKikimr::NUdf::TUnboxedValuePod& value) {
return (Datum)(((const NKikimr::NMiniKQL::TMkqlPAllocHeader*)value.AsBoxed().Get()) + 1);
return (Datum)(((const NKikimr::NMiniKQL::TMkqlPAllocHeader*)value.AsRawBoxed().Get()) + 1);
}

inline Datum PointerDatumFromItem(const NKikimr::NUdf::TBlockItem& value) {
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2 changes: 2 additions & 0 deletions ydb/library/yql/public/udf/udf_value.h
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Expand Up @@ -827,6 +827,8 @@ friend class TUnboxedValue;

inline TStringValue AsStringValue() const;
inline IBoxedValuePtr AsBoxed() const;
inline TStringValue::TData* AsRawStringValue() const;
inline IBoxedValue* AsRawBoxed() const;
inline bool UniqueBoxed() const;

// special values
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12 changes: 12 additions & 0 deletions ydb/library/yql/public/udf/udf_value_inl.h
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Expand Up @@ -390,6 +390,18 @@ inline IBoxedValuePtr TUnboxedValuePod::AsBoxed() const
return IBoxedValuePtr(Raw.Boxed.Value);
}

inline TStringValue::TData* TUnboxedValuePod::AsRawStringValue() const
{
UDF_VERIFY(IsString(), "Value is not a string");
return Raw.String.Value;
}

inline IBoxedValue* TUnboxedValuePod::AsRawBoxed() const
{
UDF_VERIFY(IsBoxed(), "Value is not boxed");
return Raw.Boxed.Value;
}

inline bool TUnboxedValuePod::UniqueBoxed() const
{
UDF_VERIFY(IsBoxed(), "Value is not boxed");
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