[release/9.0] Fix createdump 'stack smashing detected' error on arm64 #108208
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Backport of #108166 to release/9.0
/cc @mikem8361
Customer Impact
Customers (in this case RHEL dev) can not create core dumps on linux arm64 platforms.
This change restores the fix from PR #91865 by changing the size back to SpecialDiagInfoSize but uses the 4 parameter MemoryRegion constructor that doesn't assert the address/size is on a PAGE_SIZE alignment (PR #95433).
Issue: #108023
Regression
The changes from PR #91865 were reverted by PR #95433.
Testing
The dev that reported the issue has verified this fix.
Risk
Low. Restoring original working code.