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[BitstreamReader] Make sure the Array operand type is an encoding

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Bug found with AFL fuzz.

llvm-svn: 238269
This commit is contained in:
Filipe Cabecinhas
2015-05-27 00:48:43 +00:00
parent a872a476cb
commit 8cd99e9a5a
3 changed files with 8 additions and 0 deletions
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3
llvm/lib/Bitcode/Reader/BitstreamReader.cpp
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@@ -203,6 +203,9 @@ unsigned BitstreamCursor::readRecord(unsigned AbbrevID,
if (i + 2 != e)
report_fatal_error("Array op not second to last");
const BitCodeAbbrevOp &EltEnc = Abbv->getOperandInfo(++i);
if (!EltEnc.isEncoding())
report_fatal_error(
"Array element type has to be an encoding of a type");
if (EltEnc.getEncoding() == BitCodeAbbrevOp::Array ||
EltEnc.getEncoding() == BitCodeAbbrevOp::Blob)
report_fatal_error("Array element type can't be an Array or a Blob");