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Hello Xymon team,<br>
<br>
I discovered a bug in xymond_rrd module present in release
4.3.7 and after.<br>
Some times function update_rrd in do_rrd.c msg <span
id="ctl00_cC_ucResPM_rE_ctl01_lblTarget" class="ellipsis_text"
direction="target" keywords="pointeur,pointeur" lang="1033">pointer
(*msg) can be null. That </span><span
id="ctl00_cC_ucResPM_rE_ctl00_lblTarget" class="ellipsis_text"
direction="target" keywords="provoquer,provoquer" lang="1033">cause
an segfault at </span>strchr call.<br>
<br>
Following the coredump analyse<br>
<br>
<tt>#0 0xb775e424 in __kernel_vsyscall ()
</tt><tt><br>
</tt><tt>
#1 0xb741e781 in raise () from /lib/i686/cmov/libc.so.6
</tt><tt><br>
</tt><tt>
#2 0xb7421bb2 in abort () from /lib/i686/cmov/libc.so.6
</tt><tt><br>
</tt><tt>
#3 0x08070723 in sigsegv_handler (signum=11) at sig.c:57
</tt><tt><br>
</tt><tt>
#4 <signal handler called>
</tt><tt><br>
</tt><tt>
#5 0xb7466a83 in strchr () from /lib/i686/cmov/libc.so.6
</tt><tt><br>
</tt><tt>
#6 0x08050b80 in do_ncv_rrd (hostname=0xb6c847af
"lvmpitg-sql02o.lvm93.cvf", </tt><tt><br>
</tt><tt>
testname=0xb6c847c8 "mbs_oracle1", classname=0x807fc0d "", </tt><tt><br>
</tt><tt>
pagepaths=0x807fc0d "", msg=0x0, tstamp=1359477166) at
rrd/do_ncv.c:54
</tt><tt><br>
</tt><tt>
#7 0x0805a45f in update_rrd (hostname=0xb6c847af
"lvmpitg-sql02o.lvm93.cvf", </tt><tt><br>
</tt><tt>
testname=0xb6c847c8 "mbs_oracle1", msg=0x0, tstamp=1359477166,
</tt><tt><br>
</tt><tt>
sender=0xb6c847a1 "10.193.26.14", ldef=0x9f5d608,
classname=0x807fc0d "", </tt><tt><br>
</tt><tt>
pagepaths=0x807fc0d "") at do_rrd.c:712
</tt><tt><br>
</tt><tt>
#8 0x0804a90f in main (argc=3, argv=0xbfadf744) at
xymond_rrd.c:369
</tt><tt><br>
</tt><br>
<br>
I have modified source code to control msg content.<br>
See the attachement.<br>
<br>
I suppose that isn't the best way to procede but that work better
now.<br>
<br>
<div class="moz-signature"><br>
<font color="#000000"> Best regards,</font><br>
<br>
<div>
<p style="font-family: Arial, sans-serif; margin-top: 0pt;
margin-bottom: 0pt; font-size: 10pt; color:#000000;"> <b>Nicolas
LOYAU</b> <br>
<br>
</p>
</div>
</div>
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