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Preliminary runc patch that fixes the issue: https://github.com/opencontainers/runc/pull/2897 (fixes the issue, still working on it to make it more robust and add a test case).

After further discussions, we have decided to NOT deliver this in zero day, but instead, aim it towards RHEL 8.3.0.1.  In addition, we will not be using Matt's workaround.  We will backport the runc fix that Kir mentioned in https://bugzilla.redhat.com/show_bug.cgi?id=1947432#c2.  Matt is working on readying that for RHEL.

Ugh,  dyslexia strikes again, in comment 3 I said we were aiming for 8.3.0.1, that is incorrect, we are aiming for 8.4.0.1.  Apologies for the confusion.

I gave a try for kolyshkin's patch, basically, it works for me w/ 
podman-3.0.1-6.module+el8.4.0+10487+af324045 and kernel-4.18.0-293,
although I got some warning.

https://github.com/opencontainers/runc/pull/2897#issuecomment-815975827

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-2021:4154

The needinfo request[s] on this closed bug have been removed as they have been unresolved for 500 days