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Two nullptr deref fixes in table

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Don't delete memory that wasn't allocated.

Similarly, we can't deref the first element of an array that was never
allocated.
This commit is contained in:
Monty Montgomery 2022-05-15 00:39:44 -04:00
parent 6ba4a6e6c6
commit ae87c7005c
2 changed files with 8 additions and 5 deletions
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2
libsrc/general/table.cpp
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@ -109,8 +109,10 @@ namespace netgen
{ {
void * p = new char [(line.maxsize+5) * elsize]; void * p = new char [(line.maxsize+5) * elsize];
if (line.size > 0 && line.col != NULL) {
memcpy (p, line.col, line.maxsize * elsize); memcpy (p, line.col, line.maxsize * elsize);
delete [] (char*)line.col; delete [] (char*)line.col;
}
line.col = p; line.col = p;
line.maxsize += 5; line.maxsize += 5;

3
libsrc/general/table.hpp
View File

@ -120,7 +120,8 @@ public:
/// Creates fixed maximal element size table /// Creates fixed maximal element size table
inline TABLE (const NgFlatArray<int,BASE> & entrysizes) inline TABLE (const NgFlatArray<int,BASE> & entrysizes)
: BASE_TABLE (NgFlatArray<int> (entrysizes.Size(), const_cast<int*>(&entrysizes[BASE])), : BASE_TABLE (NgFlatArray<int> (entrysizes.Size(),
entrysizes.Size() > 0 ? const_cast<int*>(&entrysizes[BASE]) : 0),
sizeof(T)) sizeof(T))
{ ; } { ; }