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Make sure there are enough blocks for the stream

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llvm-svn: 271012
This commit is contained in:
David Majnemer 2016-05-27 16:16:48 +00:00
parent fc0e03c4b0
commit f4e1d5fc8d
1 changed files with 18 additions and 0 deletions
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18
lib/DebugInfo/PDB/Raw/PDBFile.cpp
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@ -257,10 +257,28 @@ Error PDBFile::parseStreamData() {
return make_error<RawError>(raw_error_code::corrupt_file,
"Orphaned block found?");
uint64_t BlockOffset = blockToOffset(Data, getBlockSize());
if (BlockOffset + getBlockSize() < BlockOffset)
return make_error<RawError>(raw_error_code::corrupt_file,
"Bogus stream block number");
if (BlockOffset + getBlockSize() > M.getBufferSize())
return make_error<RawError>(raw_error_code::corrupt_file,
"Stream block number is out of bounds");
StreamBlocks->push_back(Data);
}
}
for (uint32_t SI = 0; SI != NumStreams; ++SI) {
uint64_t NumExpectedStreamBlocks =
bytesToBlocks(getStreamByteSize(SI), getBlockSize());
size_t NumStreamBlocks = getStreamBlockList(SI).size();
if (NumExpectedStreamBlocks != NumStreamBlocks)
return make_error<RawError>(raw_error_code::corrupt_file,
"The number of stream blocks is not "
"sufficient for the size of this stream");
}
// We should have read exactly SB->NumDirectoryBytes bytes.
assert(DirectoryBytesRead == SB->NumDirectoryBytes);
return Error::success();