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Description of problem:

"podman exec -it" will hang with leading keyborad input.


Version-Release number of selected component (if applicable):

podman-1.6.4-2.module_el8.1.0+272+3e64ee36.x86_64
runc-1.0.0-64.rc9.module_el8.1.0+272+3e64ee36.x86_64


How reproducible:

100%

Steps to Reproduce:
1. podman run -dt --rm --name alpine docker.io/alpine 
2. (sleep 5; podman exec -it alpine /bin/sh )
3. # quickly hit keyboard to input something before podman begin.


Actual results:

podman exec will hang.

 ~]$ (sleep 5; podman exec -it alpine /bin/sh )
hello # I input before podman running



/ #    # hang here



Expected results:

podman runs normally.

Additional info:

I believe this was recently fixed upstream by Matt.  Assigning to him to comment.

I have reports that we may have regressed upstream. I'll try and verify tomorrow

Looks like this is the upstream issue:
https://github.com/containers/libpod/issues/4397

Verified on podman-2.0.0-0.9.rc7.module+el8.3.0+7084+c16098dd.x86_64
w/ conmon-2.0.16-1.module+el8.3.0+6615+53797f3b.x86_64.

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 (Moderate: container-tools:rhel8 security, bug fix, and enhancement update), 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://access.redhat.com/errata/RHSA-2020:4694