Bug#846649: Frequent segfaults of coturn

[Jonas Meurer]

Package: coturn
Version: 4.5.0.5-1
Severity: serious

Hi,

I encounter frequent segfaults of coturn on a Debian Squeeze VM with
recent kernel (4.8.7-1). I don't know much about coturn, just use it for
a Spreed.ME installation and so far it worked well. But recently it
started to segfault out of the blue. I'm pretty sure that it's not even
used when segfaulting as it is a test installation with very few users.

Here's the log output from syslog:

Nov 28 22:37:49 ld-test kernel: [3277040.519778] turnserver[4996]: segfault at 8 ip 00007fc8f6a38dc6 sp 00007fc8f134bce0 error 4 in libssl.so.1.0.2[7fc8f6a10000+5f000]

Nov 29 15:53:59 ld-test kernel: [3339210.639775] turnserver[4691]: segfault at 8 ip 00007f9afec9adc6 sp 00007f9af95adce0 error 4 in libssl.so.1.0.2[7f9afec72000+5f000]

Dec  2 18:46:41 ld-test kernel: [14301.129202] turnserver[658]: segfault at 8 ip 00007f52b5932dc6 sp 00007f52af843ce0 error 4 in libssl.so.1.0.2[7f52b590a000+5f000]

/var/log/turn/turn_<date>.log and /var/log/turn_<PID>_<date>.log both
don't hold anything related to the segfault.

I'll gladly further debug the issue if you give me instructions.

Cheers,
 jonas

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.8.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages coturn depends on:
ii  adduser                  3.115
ii  libc6                    2.24-7
ii  libevent-core-2.0-5      2.0.21-stable-2.1
ii  libevent-extra-2.0-5     2.0.21-stable-2.1
ii  libevent-openssl-2.0-5   2.0.21-stable-2.1
ii  libevent-pthreads-2.0-5  2.0.21-stable-2.1
ii  libhiredis0.13           0.13.3-2
ii  libmariadbclient18       10.0.28-2
ii  libpq5                   9.6.1-2
ii  libsqlite3-0             3.15.1-1
ii  libssl1.0.2              1.0.2j-4
ii  lsb-base                 9.20161125
ii  telnet [telnet-client]   0.17-41

coturn recommends no packages.

Versions of packages coturn suggests:
pn  sip-router   <none>
pn  xmpp-server  <none>

-- Configuration Files:
/etc/default/coturn changed:
TURNSERVER_ENABLED=1

/etc/turnserver.conf changed:
listening-port=8443
alt-listening-port=3478


listening-ip=172.18.20.144
relay-ip=172.18.20.144


fingerprint
lt-cred-mech
use-auth-secret
static-auth-secret=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
realm=XXXXXXXXXXXXXXXXXXX
total-quota=100
bps-capacity=0
stale-nonce=600
cert=/etc/letsencrypt/live/XXXXXXXXXXXXXXXXXXXXXXXXXX/fullchain.pem
pkey=/etc/letsencrypt/live/XXXXXXXXXXXXXXXXXXXXXXXXXX/privkey.pem
log-file=/var/log/turn/turn.log

no-loopback-peers
no-multicast-peers


-- no debconf information