Github user jeking3 commented on a diff in the pull request:
https://github.com/apache/thrift/pull/1128#discussion_r95216695
--- Diff: lib/cpp/src/thrift/transport/THeaderTransport.cpp ---
@@ -375,7 +383,12 @@ void THeaderTransport::resetProtocol() {
}
uint32_t THeaderTransport::getWriteBytes() {
- return wBase_ - wBuf_.get();
+ ptrdiff_t wb = wBase_ - wBuf_.get();
+ if (wb > std::numeric_limits<uint32_t>().max()) {
+ throw TTransportException(TTransportException::CORRUPTED_DATA,
+ "write size is unreasonable");
+ }
--- End diff --
Unfortunately using a template like this caused build warnings to occur
when the inputs are not the same signed-ness. I think these bounds checks need
to be done with eyes wide open, and need to be specific in each case in order
to avoid compiler warnings.
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