Hi All,
<div><br></div><div>I&#39;m observing a core intermittently at &quot;qm_status (qm=0x786cd000) at mem/q_malloc.c:763&quot; for kamailio version 3.1.0</div><div><br></div><div>looking at the backtrace this is occurring while doing a tcp buffer overrun. Please have a look and let me know if anyone observed this issue or how can we debug it.</div>
<div><br></div><div><br></div><div>Please find the backtrace and kamailio version</div><div><br></div><div><br></div><div><div><div>osbprod-V2R0:~ # /usr/sbin/kamailio -V</div><div>version: kamailio 3.1.0 (i386/linux) 21a375</div>
<div>flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, DBG_QM_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES</div>
<div>ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, PKG_SIZE 15MB</div><div>poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.</div><div>id: 21a375</div>
<div>compiled on 12:38:44 Apr 26 2012 with gcc 4.5.0</div></div><br class="Apple-interchange-newline"></div><div><br></div><div><br></div><div><p class="MsoNormal">#0  qm_status (qm=0x786cd000) at mem/q_malloc.c:763</p>

<p class="MsoNormal">#1  0x0819c0f3 in qm_debug_frag (qm=0x786cd000,
f=&lt;value optimized out&gt;) at mem/q_malloc.c:167</p>

<p class="MsoNormal">#2  0x0819c352 in qm_free (qm=0x786cd000, p=0x7a6cb6ac,
file=0x821cce2 &quot;&lt;core&gt;: tcp_main.c&quot;, func=0x822285f
&quot;wbufq_run&quot;, line=880) at mem/q_malloc.c:457</p>

<p class="MsoNormal">#3  0x0815f686 in wbufq_run (tcpconn=0x7a1a7548, ev=4,
fd_i=-1) at tcp_main.c:880</p>

<p class="MsoNormal">#4  handle_tcpconn_ev (tcpconn=0x7a1a7548, ev=4,
fd_i=-1) at tcp_main.c:4141</p>

<p class="MsoNormal">#5  0x08169bf2 in io_wait_loop_epoll () at
io_wait.h:1092</p>

<p class="MsoNormal">#6  tcp_main_loop () at tcp_main.c:4606</p>

<p class="MsoNormal">#7  0x080b0404 in main_loop () at main.c:1655</p>

<p class="MsoNormal">#8  0x080b1f84 in main (argc=9, argv=0xbfb4c9f4) at
main.c:2446</p>

<p class="MsoNormal">(gdb) l</p>

<p class="MsoNormal">758            
LOG_(DEFAULT_FACILITY, memlog, &quot;qm_status: &quot;,</p>

<p class="MsoNormal">759                            
&quot;dumping free list stats :\n&quot;);</p>

<p class="MsoNormal">760            
for(h=0,i=0;h&lt;QM_HASH_SIZE;h++){</p>

<p class="MsoNormal">761      
              unused=0;</p>

<p class="MsoNormal">762                    
for (f=qm-&gt;free_hash[h].head.u.nxt_free,j=0;</p>

<p class="MsoNormal">763                                    
f!=&amp;(qm-&gt;free_hash[h].head); f=f-&gt;u.nxt_free, i++, j++){</p>

<p class="MsoNormal">764                                    
if (!FRAG_WAS_USED(f)){</p>

<p class="MsoNormal">765                                            
unused++;</p>

<p class="MsoNormal">766     #ifdef DBG_QM_MALLOC</p>

<p class="MsoNormal">767                                            
LOG_(DEFAULT_FACILITY, memlog, &quot;qm_status: &quot;,</p></div><div><br></div><div><br></div><div><br></div><div><div><br></div></div>