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clustermon (because of modcluster) also affected...

+++ This bug was initially created as a clone of Bug #1076711 +++

Just observed a situation where the current polling code breaks in case
of input being the exact multiple of the read buffer size (4096).

The cardinal issue is that the code didn't expect POLLHUP to appear
when not original asked for capture, and in turn, not expecting poll
will return positive number in such case, leading to fallback to
"nothing read of malformatted input" condition.

This is partly in one line with previously discovered issues
([bug 732483]), which led me to some more code base reviews,
resulting even in a patch to this very issue (although it was
more like fix "suspicious" than "apparent" back then): [1].
Unfortunately there was no direct justification for that patch
at that time.

[1] https://git.fedorahosted.org/cgit/conga.git/commit/?id=631b17aab8f44396c4cf373bc4466bbfcaab6563

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.

http://rhn.redhat.com/errata/RHBA-2014-1582.html