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Description of problem:
'ping' and 'arping' in RHEL6 iputils does not unmask signals.  This can cause issues when ping is called from a parent process that has masked signals.

Upstream has fixed this with the following commit:
http://www.linux-ipv6.org/gitweb/gitweb.cgi?p=gitroot/iputils.git;a=blobdiff;f=ping_common.c;h=3d03bb60fef22e312305a37430f1edf9bcb5af76;hp=eaedca8f2ac97379947abe8383a414d884bd3f34;hb=810dd7fc2aed5c81382de2c92d3533fc440c8868;hpb=612b3af5ceca5accdb4b67f33314b188c2c9f628

Customer requests this change be backported to RHEL6.

Version-Release number of selected component (if applicable):
iputils-20071127-21.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. call `ping -c 6 -w 1 169.254.111.111` from a process with signals masked
2.
3.

Actual results:
ping continues sending packets forever, never receiving the SIGALRM ( '-w 1' sends a SIGALRM after 1 second).

Expected results:
ping should exit after 1 second

Additional info:

This was fixed for 'arping' in Fedora 20 via https://bugzilla.redhat.com/show_bug.cgi?id=1085971

But upstream fixed it in a different way.

I'm attaching a small c program that demonstrates the problem.  The code is based on the reproducer in BZ#1085971

Created attachment 1155765 [details]
reproducer

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/RHBA-2017-0604.html