[Bug uprobes/10595] uprobe probes causes selinux failures

[mjw at redhat dot com]

------- Additional Comments From mjw at redhat dot com  2009-09-18 15:08 -------
Neither the issue in comment #17 nor the issue in comment #18 could be reproduced.

There were two different issues though, neither apparently directly related to
this bug, but just with symptoms that looked similar.

1) The new enabled semaphores used the .probes section for holding variables.
This conflicted with the non-writable .probes section definition in sdt.h. This
was fixed by:

commit 5ee3f305e81fd2e1953d8a74530326f728a33ce8
Author: Mark Wielaard <mjw@redhat.com>
Date:   Fri Sep 18 16:13:24 2009 +0200

    Always mark .probes section as writable.
    
    Allocated section needs to be writable when creating pic shared objects
    because we store relocatable addresses in them.  We used to make this
    read only for non-pic executables, but the new semaphore support relies
    on having a writable .probes section to put the enabled variables in.
    
    * includes/sys/sdt.h (ALLOCSEC): Define unconditionally as "aw".

2) There seems to be a kernel warning (bug?) in ima_file_free() called by
selinux_file_free_security() that triggers with and without this fix.
https://bugzilla.redhat.com/show_bug.cgi?id=519737

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http://sourceware.org/bugzilla/show_bug.cgi?id=10595

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