[Xymon] Too much data for svcstatus.sh?

[Mike Burger]

Good morning.

Running Xymon 4.3.30, compiled from source tarball, on a RHEL 6.10 
server.

This morning, I encountered an interesting issue.

I have a monitored system that has 197 discrete filesystems/mounts.

When I attempt to enter this server's "Trends" section, I receive an 
internal server error (500).

My httpd error log shows this when I attempt to access the trends link 
for the server in question:

[Thu May 21 11:29:41 2020] [error] [client 10.40.24.55] Premature end of 
script headers: svcstatus.sh, referer: 
http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
[Thu May 21 11:29:59 2020] [error] [client 10.40.24.55] *** glibc 
detected *** /apps/xymon/server/bin/svcstatus.cgi: realloc(): invalid 
next size: 0x0000000000de7dd0 ***, referer: 
http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
[Thu May 21 11:29:59 2020] [error] [client 10.40.24.55] 
/apps/xymon/server/bin/svcstatus.cgi[0x408a4f], referer: 
http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
[Thu May 21 11:29:59 2020] [error] [client 10.40.24.55] 
/apps/xymon/server/bin/svcstatus.cgi[0x403453], referer: 
http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
[Thu May 21 11:29:59 2020] [error] [client 10.40.24.55] 
/apps/xymon/server/bin/svcstatus.cgi[0x404bb7], referer: 
http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
[Thu May 21 11:29:59 2020] [error] [client 10.40.24.55] 
/apps/xymon/server/bin/svcstatus.cgi[0x4022c9], referer: 
http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
[Thu May 21 11:29:59 2020] [error] [client 10.40.24.55] 
00400000-0043c000 r-xp 00000000 fd:08 24906                              
/apps/xymon/server/bin/svcstatus.cgi, referer: 
http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
[Thu May 21 11:29:59 2020] [error] [client 10.40.24.55] 
0063c000-0063e000 rw-p 0003c000 fd:08 24906                              
/apps/xymon/server/bin/svcstatus.cgi, referer: 
http://sysmon.fhmc.local/xymon/edmprod/edmprod.html

This does not happen for any other monitored system in my environment.

This system is one of the more critical servers in my environment, so 
I'd like to figure out what's going on and remediate it if possible.

-- 
Mike Burger
http://www.bubbanfriends.org

"It's always suicide-mission this, save-the-planet that. No one ever 
just stops by to say 'hi' anymore." --Colonel Jack O'Neill, SG1