[stunnel-users] Memory leak on reconfiguration

[Alexander Paramonov]

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.

-- 
Best regards
Alexander Paramonov
Software Engineer
Terminal Technologies
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