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[BitcodeReader] Change an assert to a call to a call to Error()

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It's reachable from user input.

Bug found with AFL fuzz.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238633 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Filipe Cabecinhas 2015-05-30 00:17:20 +00:00
parent dbf84c95fe
commit 3b821159da
3 changed files with 7 additions and 2 deletions
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4
lib/Bitcode/Reader/BitcodeReader.cpp
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@ -1634,9 +1634,9 @@ std::error_code BitcodeReader::ParseMetadata() {
Record.clear();
Code = Stream.ReadCode();
// METADATA_NAME is always followed by METADATA_NAMED_NODE.
unsigned NextBitCode = Stream.readRecord(Code, Record);
assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
if (NextBitCode != bitc::METADATA_NAMED_NODE)
return Error("METADATA_NAME not followed by METADATA_NAMED_NODE");
// Read named metadata elements.
unsigned Size = Record.size();

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test/Bitcode/Inputs/invalid-metadata-not-followed-named-node.bc Normal file
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5
test/Bitcode/invalid.test
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@ -187,3 +187,8 @@ RUN: not llvm-dis -disable-output %p/Inputs/invalid-array-operand-encoding.bc 2>
RUN: FileCheck --check-prefix=ARRAY-OP-ENC %s
ARRAY-OP-ENC: Array element type has to be an encoding of a type
RUN: not llvm-dis -disable-output %p/Inputs/invalid-metadata-not-followed-named-node.bc 2>&1 | \
RUN: FileCheck --check-prefix=META-NOT-FOLLOWED-BY-NAMED-META %s
META-NOT-FOLLOWED-BY-NAMED-META: METADATA_NAME not followed by METADATA_NAMED_NODE