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.

+++ This bug was initially created as a clone of Bug #1094548 +++

Description of problem:

The bug 1094548 appears to be present also on RHEL7.

Version-Release number of selected component (if applicable):
sudo-1.8.6p7-13.el7


How reproducible:

Always


Steps to Reproduce:

1. Set "Defaults cmnd_no_wait" in /etc/sudoers

2. Run the following command all together:

    $ sudo -k; sudo bash -c "yes | fold | head -n1"

   Note: As mentioned below, the sudo -k is important to ensure there
         is an out of date cache. [1]

Actual results:

 Sudo ignores SIGPIPE somewhere in the authentication stack, perhaps
 in src/tgetpass.c.  Thus the command hangs.


Expected results:

  The chain executed by sudo should not hang in these cases.

Created attachment 1155628 [details]
proposed patch

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2016-2593.html