Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

In bug #569695, it was discovered that python's sys/sdt.h probes were not
being activated with systemtap 1.4 on s390x.  jistone discovered that the
s390x kernel's "noexec" default behaviour is different from other architectures,
and that the systemtap runtime was not turning on the sys/sdt.h semaphores.

A fix is now available in upsteam systemtap, and can be backported into the
rhel6.1 build.  It is a low-risk fix, jistone will comment on testing results
on other architectures.  OTOH it only affects this particular combination of
architecture and uncommon sys/sdt.h usage pattern.  PM etc. may decide whether
to defer to RHEL6.2.

Created attachment 487423 [details]
Find SDT semaphores even in RWX mappings

This is the upstream commit.  I've confirmed that it fixes the problem discovered in python tests on s390, and the same tests on x86 and x86_64 continue to work.

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0651.html