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Fixes VxWorksSymTab_Finder.java edge case

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Fixes MemoryAccessException that occurs if a candidate entry goes into invalid memory.
This commit is contained in:
Ben Demick
2025-04-17 16:35:37 -04:00
committed by GitHub
parent 2abfd4e309
commit 45b91b1818
1 changed files with 6 additions and 1 deletions
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7
Ghidra/Features/GnuDemangler/ghidra_scripts/VxWorksSymTab_Finder.java
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@@ -415,7 +415,12 @@ public class VxWorksSymTab_Finder extends GhidraScript {
// Test is weak. // Test is weak.
//------------------------------------------------------------------------ //------------------------------------------------------------------------
private boolean isSymTblEntry(Address entry, VxSymbol vxSymbol) throws Exception { private boolean isSymTblEntry(Address entry, VxSymbol vxSymbol) throws Exception {
// Make sure there's data for the symbol
if ( !isAddress(entry.getOffset() + vxSymbol.length() - 1) ) {
return false;
}
// First dword must be null or a valid ptr (typically into the sym table) // First dword must be null or a valid ptr (typically into the sym table)
long value = getInt(entry) & 0xffffffffL; long value = getInt(entry) & 0xffffffffL;
if ((value != 0) && !isAddress(value)) { if ((value != 0) && !isAddress(value)) {