[Bug runtime/14223] perf probes fail if not root

[fche at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14223

Frank Ch. Eigler <fche at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |fche at redhat dot com

--- Comment #1 from Frank Ch. Eigler <fche at redhat dot com> 2012-06-12 15:37:08 UTC ---
Wacky.  It's strange for a deeper-down kernel api to enforce authorization, as
opposed to a close-to-userspace syscall handler, but alas.  We should
investigate whether this part of the module runs during a callback caused by
(setuid-root) staprun vs. (unprivileged) stapio that staprun execs.  If the
latter, we may be able to "fix" it by having some probe registration occur
earlier, perhaps with an additional transport message.

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