ConeyLiu opened a new pull request, #13815:
URL: https://github.com/apache/arrow/pull/13815
The following code of `BaseVariableWidthVector.handleSafe` could fail to
relocated because of int overflow and then led to `IndexOutOfBoundsException`
when we put the data into the vector.
```java
protected final void handleSafe(int index, int dataLength) {
while (index >= getValueCapacity())
{ reallocValidityAndOffsetBuffers(); }
final int startOffset = lastSet < 0 ? 0 : getStartOffset(lastSet + 1);
// Here, the startOffset + dataLength could overflow
while (valueBuffer.capacity() < (startOffset + dataLength))
{ reallocDataBuffer(); }
}
```
The offset width of `BaseVariableWidthVector` is 4, while the maximum memory
allocation is Long.MAX_VALUE. This makes the memory allocation check invalid.
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