Greg --
First, some background: since GT.M is a compiler, and since M requires
code to be dynamically compiled and executed, GT.M needs to be able to
execute code in a process' heap/stack space. Since this is not a
requirement of normal C/C++ programs, and since one of the precepts of
good security is to grant no privileges save those that are required, it
is increasingly common to disable the ability of a process to execute
code from heap/stack space.
The signature of the problem looks like this security configuration
setting on your system may be preventing GT.M from running properly. If
you are not running SELinux, then it is possible that an exec-shield
setting is tripping GT.M up (exec-shield is a Linux security feature in
Red Hat / Fedora kernels). The following needs to be performed as root.
1. Determine whether exec-shield is operating. Examine the files
/proc/sys/kernel/exec-shield and /proc/sys/kernel/exec-shield-randomize:
cat /proc/sys/kernel/exec-shield
cat /proc/sys/kernel/exec-shield-randomize.
2. If either value is non-zero, you may need to set it to 0:
echo 0 >/proc/sys/kernel/exec-shield
echo 0 >/proc/sys/kernel/exec-shield-randomize
3. Try installing GT.M now, and if it fails try rebooting the PC, check
the values and try again.
Please let me know the result of the above. Thanx muchly.
-- Bhaskar
P.S. In case you want to re-enable exec-shield system wide after GT.M is
installed, you can re-enable it, but you should then disable it for
GT.M. To disable it for GT.M once installed, assuming that GT.M is
installed in /usr/local/gtm-v5, try:
execstack -s /usr/local/gtm-v5/mumps
execstack -s /usr/local/gtm-v5/libgtmshr.so
Greg Martinson wrote:
To answer your questions in the previous message:
Are you running as root? Did you encounter this with GT.M V4.4-004?
Yes, I'm running as root. Don't know about v4.4, this is a new
implementation, i.e. no previous gtm versions existed.
What distribution are you running?
We're running centos 3.5 [RHEL 3 update 5]
Do you have Security Enhanced Linux turned on?
No.
Thank you for your help,
gmartinson
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