<p>This is the <code>NGCP</code> version of 4.4.5<br>
sources at <a href="https://github.com/sipwise/kamailio/tree/mr4.5.4">https://github.com/sipwise/kamailio/tree/mr4.5.4</a> but be aware that list of patches are at <a href="https://github.com/sipwise/kamailio/blob/mr4.5.4/debian/patches/series">https://github.com/sipwise/kamailio/blob/mr4.5.4/debian/patches/series</a><br>
and I changed the sensible data from the paste</p>
<p>In order you to see the source easily I pasted dlg_handlers.c already patched at <a href="https://paste.debian.net/926240/">https://paste.debian.net/926240/</a></p>
<pre><code>(gdb) f 4
#4 0x00007fae32c3457e in dlg_onroute (req=0x7fae3def7ac8, route_params=0x7fad006e9b1e,
param=0x7fff717dab10) at dlg_handlers.c:1350
1350 dlg_handlers.c: No such file or directory.
(gdb) info locals
val = {
s = 0x9aaf79 <buf+1465> "c68.0d81;ice_caller=strip;ice_callee=strip;aset=50;rtpprx=yes;vsf=Y3Z5enJeQmp8bVRNYGQtEwxdZHR2LHRwc1RAaX0hWEFyMw1mZg-->\r\nP-NGCP-Src-Ip: 172.17.65.99\r\nP-NGCP-Src-Port: 5060\r\nP-NGCP-Src-Proto: udp\r\nP-NG"..., len = 8}
ftag = {
s = 0x9aabaa <buf+490> "C03675F3E457BC60\r\nTo: <sip:00000000000@sip.local:5060>;tag=0FC4E4CA-58E4A7D4000A8034-123E3700\r\nCall-ID: 3A477FD70434C083@10.10.10.18\r\nCSeq: 5709 BYE\r\nProxy-Authorization: Digest username=\"2233"..., len = 16}
old_state = 4
dir = 1
ret = 0
callid = {
s = 0x9aac1a <buf+602> "3A477FD70434C083@10.10.10.18\r\nCSeq: 5709 BYE\r\nProxy-Authorization: Digest username=\"1111111111\", realm=\"sip.local\", nonce=\"WOUBrFjkp9Qj4YjEwa9jvelH7ty68fD/\", uri=\"sip:00000000000@172.17.66.118"..., len = 28}
new_state = 5
unref = 1
event = 10498440
dlg = 0x7fad74f20258
ttag = {
s = 0x9aabed <buf+557> "0FC4E4CA-58E4A7D4000A8034-123E3700\r\nCall-ID: 3A477FD70434C083@10.10.10.18\r\nCSeq: 5709 BYE\r\nProxy-Authorization: Digest username=\"1111111111\", realm=\"sip.local\", nonce=\"WOUBrFjkp9Qj4YjEwa9jvelH"..., len = 34}
h_id = 854147520
dlg = 0x7fad00000000
</code></pre>
<p>So relevant code is too</p>
<pre><code> LM_WARN("inconsitent dlg timer data on dlg %p [%u:%u] "
"with clid '%.*s' and tags '%.*s' '%.*s'\n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg->tag[DLG_CALLER_LEG].len, dlg->tag[DLG_CALLER_LEG].s,
dlg->tag[DLG_CALLEE_LEG].len, dlg->tag[DLG_CALLEE_LEG].s);
</code></pre>
<blockquote>
<p>So no strlen() to be used there.</p>
</blockquote>
<p>but the <code>strlen()</code> is coming from <code>syslog()</code></p>
<p>I would say the problem is <code>dlg</code> is gone from memory when trying to use the string</p>
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