[Help-gnutls] Memory leak

[markus.hager at exgate.tek.com]

Hi

 

we've encountered memory problems with GNUTLS and I wonder if someone
else has experienced similar trouble.

 

 

We  wrapped GNUTLS 1.4.4 it in a 'memory manager'. That means we force
GNUTLS to use our memory functions. 

What we find is that not all memory blocks that are allocated by GNUTLS
are freed. We are loosing approx. 65 byte on client and 200 on server
side per handshake.

 

The following is the sequence in which we call the gnutls_functions: 

gnutls_global_set_mem_functions (alloc, alloc, NULL, realloc, free) 

gnutls_global_init

gnutls_init

gnutls_handshake

gnutls_deinit

gnutls_global_deinit

 

We don't use any functionality to store (resume) session. So GNUTLS is
supposed to free all memory allocated during a handshake in
gnutls_deinit, isn't it?

Well, in our case it doesn't. With every handshake more and more memory
gets lost. Is there a mistake in our handling of the library or is there
a problem in the GNUTLS implementation? 

                                    

                                                             

Thanks for your answers.

 

Regards 

Markus

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