library loading problem

[Chakravarthi]

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

[Stuart Browne · Accepted solution]

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.

[Chakravarthi]

hi,

i'm trying this on Fedora Core 4 machine

--chakri

[Chakravarthi]

thanks stuart,

it works,

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

regards
chakri

[Stuart Browne]

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 .

[Chakravarthi]

thanks
chakri