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IRBuilder: Validate local indexes #8099

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Merged
kripken merged 1 commit into from
Dec 10, 2025
+9 −0
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IRBuilder: Validate local indexes #8099

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9 changes: 9 additions & 0 deletions src/wasm/wasm-ir-builder.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1412,6 +1412,9 @@ Result<> IRBuilder::makeLocalGet(Index local) {
if (!func) {
return Err{"local.get is only valid in a function context"};
}
if (local >= func->getNumLocals()) {
return Err{"invalid local.get index"};
}
push(builder.makeLocalGet(local, func->getLocalType(local)));
return Ok{};
}
Expand All @@ -1420,6 +1423,9 @@ Result<> IRBuilder::makeLocalSet(Index local) {
if (!func) {
return Err{"local.set is only valid in a function context"};
}
if (local >= func->getNumLocals()) {
return Err{"invalid local.set index"};
}
LocalSet curr;
curr.index = local;
CHECK_ERR(visitLocalSet(&curr));
Expand All @@ -1431,6 +1437,9 @@ Result<> IRBuilder::makeLocalTee(Index local) {
if (!func) {
return Err{"local.tee is only valid in a function context"};
}
if (local >= func->getNumLocals()) {
return Err{"invalid local.tee index"};
}
LocalSet curr;
curr.index = local;
CHECK_ERR(visitLocalSet(&curr));
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