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Fix a use after free on invalid input.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193737 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2013-10-31 04:20:23 +00:00
parent 8f4397799f
commit cc8c673e61
3 changed files with 8 additions and 5 deletions
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6
lib/Bitcode/Reader/BitcodeReader.cpp
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@ -623,11 +623,7 @@ bool BitcodeReader::ParseAttrKind(uint64_t Code, Attribute::AttrKind *Kind) {
*Kind = Attribute::ZExt; *Kind = Attribute::ZExt;
return false; return false;
default: default:
std::string Buf; return Error("Unknown attribute kind");
raw_string_ostream fmt(Buf);
fmt << "Unknown attribute kind (" << Code << ")";
fmt.flush();
return Error(Buf.c_str());
} }
} }

7
test/Bitcode/invalid.ll Normal file
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@ -0,0 +1,7 @@
; RUN: not llvm-dis < %s.bc 2>&1 | FileCheck %s
; CHECK: llvm-dis: Unknown attribute kind
; invalid.ll.bc has an invalid attribute number.
; The test checks that LLVM reports the error and doesn't access freed memory
; in doing so.

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test/Bitcode/invalid.ll.bc Normal file
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