[stunnel-users] Memory leak on reconfiguration

Wed Nov 19 12:33:46 CET 2014

OK, Michal. Thank you. Waiting for new version.

2014-11-19 14:04 GMT+03:00 Michal Trojnara <Michal.Trojnara at mirt.net>:

> Hi Alexander,
>
> This is a known issue. Fixing it is already on the TODO list.
> http://www.stunnel.org/sdf_todo.html
>
> Mike
>
> On November 19, 2014 9:19:16 AM CET, Alexander Paramonov <
> aparamonov at termt.com> wrote:
> >Hello, colleagues!
> >
> >I suppose there is a memory leak on stunnel reconfiguration when it
> >receives the SIGHUP signal. Here is my experiment with stunnel 5.05 on
> >linux:
> >
> >~/busybox $ cat /home/posdebug/stunnel.cfg
> >debug=6
> >options=NO_SSLv2
> >pid=/tmp/stunnel.pid
> >[57797]
> >accept = 127.0.0.1:57797
> >connect = 80.90.125.219:64141
> >key = /usr/unsign/key.pem
> >cert = /usr/unsign/cert.pem
> >CAfile = /usr/unsign/cert.pem
> >verify = 2
> >ciphers =
>
> >AES128-SHA:AES256-SHA:DES-CBC3-SHA:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:EDH-RSA-DES-CBC3-SHA
> >sslVersion = all
> >TIMEOUTbusy = 100
> >TIMEOUTconnect = 100
> >client = yes
> >~/busybox $ /usr/postunnel/stunnel /home/posdebug/stunnel.cfg
> >~/busybox $ top | grep stunnel
> >  986     1 posdebug S     *3592*  5.7   0  0.0 /usr/postunnel/stunnel
> >/home/posdebug/stunnel.cfg
> >~/busybox $ kill -1 986
> >~/busybox $ kill -1 986
> >~/busybox $ kill -1 986
> >~/busybox $ kill -1 986
> >~/busybox $ kill -1 986
> >~/busybox $ top | grep stunnel
> >  986     1 posdebug S     *3720*  5.9   0  0.0 /usr/postunnel/stunnel
> >/home/posdebug/stunnel.cfg
> >~/busybox $ kill -1 986
> >~/busybox $ kill -1 986
> >~/busybox $ kill -1 986
> >~/busybox $ kill -1 986
> >~/busybox $ top | grep stunnel
> >  986     1 posdebug S     *3848*  6.2   0  0.0 /usr/postunnel/stunnel
> >/home/posdebug/stunnel.cfg
> >
> >As i noticed, there are a lot of allocs on reconfiguration and only a
> >few
> >free() calls. Why? RAM is not unlimited, as far as i know.
> >Any comments would be highly appreciated.
>
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>

-- 
Best regards
Alexander Paramonov
Software Engineer
Terminal Technologies
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