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GP-0: Guard the buffer truncation with Reason.EXECUTE_DECODE

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Dan 2023-04-03 09:33:55 -04:00
parent 88d0110a09
commit deaa24a496
1 changed files with 12 additions and 6 deletions
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18
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/exec/BytesPcodeExecutorStateSpace.java
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@ -185,12 +185,18 @@ public class BytesPcodeExecutorStateSpace<B> {
} }
} }
Iterator<ULongSpan> it = /**
uninitialized.complement(ULongSpan.extent(offset, size)).iterator(); * The decoder will buffer ahead, so give it as much as we can, but no more than is actually
if (it.hasNext()) { * initialized. If it's a (non-decode) read, give it everything, but invoke the warning.
ULongSpan init = it.next(); */
if (init.min().longValue() == offset) { if (reason == Reason.EXECUTE_DECODE) {
return readBytes(offset, (int) init.length(), reason); Iterator<ULongSpan> it =
uninitialized.complement(ULongSpan.extent(offset, size)).iterator();
if (it.hasNext()) {
ULongSpan init = it.next();
if (init.min().longValue() == offset) {
return readBytes(offset, (int) init.length(), reason);
}
} }
} }