Make sure the CastInst is valid before trying to create it

Bug found with afl-fuzz. llvm-svn: 249396
2015-10-06 12:37:54 +00:00
parent 4c33a1af5d
commit b70fd8719e
3 changed files with 9 additions and 1 deletions
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -3863,7 +3863,10 @@ std::error_code BitcodeReader::parseFunctionBody(Function *F) {
          CurBB->getInstList().push_back(Temp);
        }
      } else {
-        I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
+        auto CastOp = (Instruction::CastOps)Opc;
+        if (!CastInst::castIsValid(CastOp, Op, ResTy))
+          return error("Invalid cast");
+        I = CastInst::Create(CastOp, Op, ResTy);
      }
      InstructionList.push_back(I);
      break;