[jira] [Created] (ARROW-15615) [C++] STL allocator doesn't check for multiplication overflow

[Antoine Pitrou (Jira)]

Antoine Pitrou created ARROW-15615:
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             Summary: [C++] STL allocator doesn't check for multiplication 
overflow
                 Key: ARROW-15615
                 URL: https://issues.apache.org/jira/browse/ARROW-15615
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Antoine Pitrou


The MemoryPool-backed STL allocator defined in {{arrow/stl.h}} has the 
following code:
{code:c++}
    Status s = pool_->Allocate(n * sizeof(T), &data);
{code}

but {{n * sizeof(T)}} might silently overflow and lead to an incorrect 
allocation size.



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