Re: Boost SSL handshake(http_server_sync_ssl) : still reachable memory keeps increasing

From: Richard Hodges (hodges.r_at_[hidden])
Date: 2022-02-03 17:13:00

On Thu, 3 Feb 2022 at 15:52, Sandeep Bhardwaj via Boost-users <
boost-users_at_[hidden]> wrote:

> Hi all,
>
>   I am using boost 1.76.0 version. I have slightly modified the example
> program http_server_sync_ssl.cpp to just dump the payload it receives and i
> have used certificates with ssl context. When I run the program with
> valgrind, the "still reachable" memory keeps increasing with time. This is
> one example:
>

Thanks for posting a complete program. I'll compile it up and have a look.

>
> ==17719== 38,880 bytes in 60 blocks are still reachable in loss record 740
> of 740
> ==17719==    at 0x4C312EF: malloc (in
> /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
> ==17719==    by 0x567F438: CRYPTO_zalloc (in /usr/lib64/libcrypto.so.1.1)
> ==17719==    by 0x52AA5CA: SSL_SESSION_new (in /usr/lib64/libssl.so.1.1)
> ==17719==    by 0x52AAE22: ??? (in /usr/lib64/libssl.so.1.1)
> ==17719==    by 0x52C8A06: ??? (in /usr/lib64/libssl.so.1.1)
> ==17719==    by 0x52B7FF6: ??? (in /usr/lib64/libssl.so.1.1)
> ==17719==    by 0x52A3F43: SSL_do_handshake (in /usr/lib64/libssl.so.1.1)
> ==17719==    by 0x419630:
> boost::asio::ssl::detail::engine::do_accept(void*, unsigned long)
> (engine.ipp:316)
> ==17719==    by 0x4193E3: boost::asio::ssl::detail::engine::perform(int
> (boost::asio::ssl::detail::engine::*)(void*, unsigned long), void*,
> unsigned long, boost::system::error_code&, unsigned long*) (engine.ipp:248)
> ==17719==    by 0x418F6D:
> boost::asio::ssl::detail::engine::handshake(boost::asio::ssl::stream_base::handshake_type,
> boost::system::error_code&) (engine.ipp:148)
> ==17719==    by 0x419778:
> boost::asio::ssl::detail::handshake_op::operator()(boost::asio::ssl::detail::engine&,
> boost::system::error_code&, unsigned long&) const (handshake_op.hpp:47)
> ==17719==    by 0x424DB8: unsigned long
> boost::asio::ssl::detail::io<boost::asio::basic_stream_socket<boost::asio::ip::tcp,
> boost::asio::any_io_executor>,
> boost::asio::ssl::detail::handshake_op>(boost::asio::basic_stream_socket<boost::asio::ip::tcp,
> boost::asio::any_io_executor>&, boost::asio::ssl::detail::stream_core&,
> boost::asio::ssl::detail::handshake_op const&, boost::system::error_code&)
> (io.hpp:38)
> ==17719==    by 0x421332:
> boost::asio::ssl::stream<boost::asio::basic_stream_socket<boost::asio::ip::tcp,
> boost::asio::any_io_executor>&>::handshake(boost::asio::ssl::stream_base::handshake_type,
> boost::system::error_code&) (stream.hpp:389)
> ==17719==    by 0x41D5FC:
> boost::beast::ssl_stream<boost::asio::basic_stream_socket<boost::asio::ip::tcp,
> boost::asio::any_io_executor>&>::handshake(boost::asio::ssl::stream_base::handshake_type,
> boost::system::error_code&) (ssl_stream.hpp:344)
> ==17719==    by 0x406971:
> do_session(boost::asio::basic_stream_socket<boost::asio::ip::tcp,
> boost::asio::any_io_executor>&, boost::asio::ssl::context&,
> std::shared_ptr<std::__cxx11::basic_string<char, std::char_traits<char>,
> std::allocator<char> > const> const&) (boost_server.cpp:219)
>
> I have attached the test program. Can anyone point out what needs to be
> done here?
>
> Thanks & Regards,
> Sandeep
>
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