maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[bitcode reader] Fix an assert on invalid type tables 

Bug found with afl-fuzz

llvm-svn: 227566
This commit is contained in:
Filipe Cabecinhas 2015-01-30 10:57:58 +00:00
parent cc6e894587
commit d0858e1037
2 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
View File

@ -1095,8 +1095,10 @@ std::error_code BitcodeReader::ParseTypeTableBody() {
if (NumRecords >= TypeList.size()) if (NumRecords >= TypeList.size())
return Error("Invalid TYPE table"); return Error("Invalid TYPE table");
if (TypeList[NumRecords])
return Error(
"Invalid TYPE table: Only named structs can be forward referenced");
assert(ResultTy && "Didn't read a type?"); assert(ResultTy && "Didn't read a type?");
assert(!TypeList[NumRecords] && "Already read type?");
TypeList[NumRecords++] = ResultTy; TypeList[NumRecords++] = ResultTy;
} }
} }

BIN
llvm/test/Bitcode/Inputs/invalid-type-table-forward-ref.bc Normal file
View File

Binary file not shown.