topic Re: library loading problem in Operating System - Linux

library loading problem

Chakravarthi — Thu, 30 Jun 2005 05:34:48 GMT

hi all,

i'm getting the following error running an application.

it is giving this message while loading a library. i'm trying this on Fedora core 4.

cannot restore segment prot after reloc: Permission denied

Same application works fine in Fedora Core 3.

let me know what needs to be checked?

regards
chakri

Re: library loading problem

Stuart Browne — Thu, 30 Jun 2005 05:48:10 GMT

Lets see.. You're using SELinux in strict mode, yes?

Change the SELinux policy to either 'permissive' or 'disabled', and try it again. To do this, modify the line 'SELINUX=enforcing' in '/etc/selinux/config'.

If it works after that, then it's a matter of tracking down exactally what that library is accessing and opening up the SELinux policy for it. The 'permissive' warnings should tell you what it is that's being denied.

Re: library loading problem

Chakravarthi — Thu, 30 Jun 2005 05:57:25 GMT

hi,

i'm trying this on Fedora Core 4 machine

--chakri

Re: library loading problem

Chakravarthi — Thu, 30 Jun 2005 06:04:44 GMT

thanks stuart,

it works,

if possible can you explain me more about SELinux? and what do the different modes for?

regards
chakri

Re: library loading problem

Stuart Browne — Thu, 30 Jun 2005 06:11:50 GMT

I can tell you what the different modes are about, but I'm still learning SELinux, and how to open up permissions for access to files/processes/sockets etc..

SELINUX's 3 settings are:
disabled: Don't do any SELinux checks
permissive: Warn if any SELinux rules are broken, but don't stop the access
enforcing: Don't allow anything that breaks any of the SELinux rules.

There's a reasonable amount of documentation around these days on SELinux, it's just a matter of wading through it to understand what is required. You can start at http://fedora.redhat.com/projects/selinux/index.html .

Re: library loading problem

Chakravarthi — Thu, 30 Jun 2005 06:44:47 GMT

thanks
chakri