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Make sure that isValidElementType(Type) before calling {Array,Struct}Type::get(Type) 

Bug found with AFL fuzz.

llvm-svn: 236073
This commit is contained in:
Filipe Cabecinhas 2015-04-29 01:27:01 +00:00
parent 180b92168d
commit f15fb032ef
4 changed files with 11 additions and 2 deletions
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6
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@ -1474,7 +1474,8 @@ std::error_code BitcodeReader::ParseTypeTableBody() {
case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
if (Record.size() < 2)
return Error("Invalid record");
if ((ResultTy = getTypeByID(Record[1])))
if ((ResultTy = getTypeByID(Record[1])) &&
StructType::isValidElementType(ResultTy))
ResultTy = ArrayType::get(ResultTy, Record[0]);
else
return Error("Invalid type");
@ -1482,7 +1483,8 @@ std::error_code BitcodeReader::ParseTypeTableBody() {
case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
if (Record.size() < 2)
return Error("Invalid record");
if ((ResultTy = getTypeByID(Record[1])))
if ((ResultTy = getTypeByID(Record[1])) &&
StructType::isValidElementType(ResultTy))
ResultTy = VectorType::get(ResultTy, Record[0]);
else
return Error("Invalid type");

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llvm/test/Bitcode/Inputs/invalid-array-element-type.bc Normal file
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llvm/test/Bitcode/Inputs/invalid-vector-element-type.bc Normal file
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7
llvm/test/Bitcode/invalid.test
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@ -98,3 +98,10 @@ RUN: not llvm-dis -disable-output %p/Inputs/invalid-fwdref-type-mismatch.bc 2>&1
RUN: FileCheck --check-prefix=FWDREF-TYPE %s
FWDREF-TYPE: Invalid record
RUN: not llvm-dis -disable-output %p/Inputs/invalid-array-element-type.bc 2>&1 | \
RUN: FileCheck --check-prefix=ELEMENT-TYPE %s
RUN: not llvm-dis -disable-output %p/Inputs/invalid-vector-element-type.bc 2>&1 | \
RUN: FileCheck --check-prefix=ELEMENT-TYPE %s
ELEMENT-TYPE: Invalid type