Github user jeking3 commented on a diff in the pull request:
https://github.com/apache/thrift/pull/1128#discussion_r88804989
--- 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 --
I added apache::thrift::transport::safe_numeric_cast to the
TTransportException header. I couldn't think of a better place to put it for
now... I agree it simplifies the code in many places, and the transport code
seems to be the code closest to the platform where these transform issues exist.
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