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| author | Duncan Sands <baldrick@free.fr> | 2010-10-28 15:47:26 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2010-10-28 15:47:26 +0000 |
| commit | f22b74608ede59dabc55fab66f2142f369f9dbfb (patch) | |
| tree | ede072670cf37efc184b9583e3d5c6eaed9bf513 /lib/Bitcode/Reader | |
| parent | aa8f1f01352bdaaabf712369f8a8a615c776b508 (diff) | |
| download | llvm-f22b74608ede59dabc55fab66f2142f369f9dbfb.tar.gz llvm-f22b74608ede59dabc55fab66f2142f369f9dbfb.tar.bz2 llvm-f22b74608ede59dabc55fab66f2142f369f9dbfb.tar.xz | |
Fix PR8494: when reading invalid bitcode, getTypeByID may return
a null pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117551 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Bitcode/Reader')
| -rw-r--r-- | lib/Bitcode/Reader/BitcodeReader.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp index 5f6ce5e03c..e8b998e2a6 100644 --- a/lib/Bitcode/Reader/BitcodeReader.cpp +++ b/lib/Bitcode/Reader/BitcodeReader.cpp @@ -834,7 +834,8 @@ bool BitcodeReader::ParseMetadata() { unsigned Size = Record.size(); SmallVector<Value*, 8> Elts; for (unsigned i = 0; i != Size; i += 2) { - const Type *Ty = getTypeByID(Record[i], false); + const Type *Ty = getTypeByID(Record[i]); + if (!Ty) return Error("Invalid METADATA_NODE2 record"); if (Ty->isMetadataTy()) Elts.push_back(MDValueList.getValueFwdRef(Record[i+1])); else if (!Ty->isVoidTy()) @@ -1169,7 +1170,8 @@ bool BitcodeReader::ParseConstants() { } case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval] const VectorType *RTy = dyn_cast<VectorType>(CurTy); - const VectorType *OpTy = dyn_cast<VectorType>(getTypeByID(Record[0])); + const VectorType *OpTy = + dyn_cast_or_null<VectorType>(getTypeByID(Record[0])); if (Record.size() < 4 || RTy == 0 || OpTy == 0) return Error("Invalid CE_SHUFVEC_EX record"); Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy); @@ -1425,6 +1427,7 @@ bool BitcodeReader::ParseModule() { if (Record.size() < 6) return Error("Invalid MODULE_CODE_GLOBALVAR record"); const Type *Ty = getTypeByID(Record[0]); + if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record"); if (!Ty->isPointerTy()) return Error("Global not a pointer type!"); unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace(); @@ -1468,6 +1471,7 @@ bool BitcodeReader::ParseModule() { if (Record.size() < 8) return Error("Invalid MODULE_CODE_FUNCTION record"); const Type *Ty = getTypeByID(Record[0]); + if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record"); if (!Ty->isPointerTy()) return Error("Function not a pointer type!"); const FunctionType *FTy = @@ -1509,6 +1513,7 @@ bool BitcodeReader::ParseModule() { if (Record.size() < 3) return Error("Invalid MODULE_ALIAS record"); const Type *Ty = getTypeByID(Record[0]); + if (!Ty) return Error("Invalid MODULE_ALIAS record"); if (!Ty->isPointerTy()) return Error("Function not a pointer type!"); |