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Fix out-of-bounds write

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This commit is contained in:
Gael Guennebaud 2014-12-11 16:12:15 +01:00
parent 19e16fe15f
commit d0c3fcd382
1 changed files with 2 additions and 2 deletions
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4
Eigen/src/SparseCore/AmbiVector.h
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@ -69,7 +69,7 @@ class AmbiVector
delete[] m_buffer;
if (size<1000)
{
Index allocSize = (size * sizeof(ListEl))/sizeof(Scalar);
Index allocSize = (size * sizeof(ListEl) + sizeof(Scalar) - 1)/sizeof(Scalar);
m_allocatedElements = (allocSize*sizeof(Scalar))/sizeof(ListEl);
m_buffer = new Scalar[allocSize];
}
@ -88,7 +88,7 @@ class AmbiVector
Index copyElements = m_allocatedElements;
m_allocatedElements = (std::min)(Index(m_allocatedElements*1.5),m_size);
Index allocSize = m_allocatedElements * sizeof(ListEl);
allocSize = allocSize/sizeof(Scalar) + (allocSize%sizeof(Scalar)>0?1:0);
allocSize = (allocSize + sizeof(Scalar) - 1)/sizeof(Scalar);
Scalar* newBuffer = new Scalar[allocSize];
memcpy(newBuffer, m_buffer, copyElements * sizeof(ListEl));
delete[] m_buffer;