On Fri, Mar 25, 2011, Micha? Stawi?ski wrote: > Hi there, > Only recently I started playing with openssl, and It seems I am > encountering a memory leak when setting up a simple server using > fork(). Initially I've been suspecting some problems with SSL, but > lately I've been able to limit it to VERY simple use-case. > > It is embarassing, but I can not get through this problem. Everything > is fine as long as I stay in a single process, and process one > connection at a time. But when I wanted to get it one step further, > and used fork, some issues appeared... > > //accept a client on simple accept BIO > parent: BIO_new_accept ( host_port=2001 ) : accept_bio > parent: BIO_do_accept ( b=accept_bio ) : 1 > parent: BIO_do_accept ( b=accept_bio ) : 1 > parent: BIO_pop ( b=accept_bio ) : client_bio > > //when client is accepted, server forks > parent: fork() > //when dealing with casual sockets, after forking client closes accept socket > //(it does not need it), and server closes client (it does not need it > neither) > > //freeing popped client BIO in parent would disconnect client in child, > //so I can not free it, which will cause 64B memory leak > //parent: BIO_free ( b=client_bio ) : 1 //??? > > //freeing accept BIO in child would cause failure in parent's BIO_do_accept > //child: BIO_free ( b=accept_bio ) : 1 //??? > > child: <deal with client> > child: BIO_free ( b=client_bio ) : 1 > > 1- Why when using BIOs I can't use a casual close-client/close-accept > socket? It seems like reference counting is not working as usual > 2- How would I prevent this 64B memory leak? It is a bit painfull, > because my parent process gets bigger and bigger, causing all new > children spawned to be overbloated also > 3- What I am doing wrong? ;) >
Have you tried clearing the close flag on the BIO with something like: BIO_set_close(bio, 0) Steve. -- Dr Stephen N. Henson. OpenSSL project core developer. Commercial tech support now available see: http://www.openssl.org ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
