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Description of problem:

When a SSH server is configured in FIPS and a SSH client forces using KexAlgorithm=diffie-hellman-group-exchange-sha256, the following message is recorded in the journal:

  Using arbitrary primes is not allowed in FIPS mode. Falling back to known groups.

Talking to Jakub, he agrees this message can be downgraded to verbose since it doesn't have much value from user's point of view.

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

openssh-server-8.0p1-10.el8.x86_64

How reproducible:

Always

Steps to Reproduce:
1. Enable FIPS on the server
2. Connect to server

  $ ssh -o KexAlgorithm=diffie-hellman-group-exchange-sha256 <server>

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 (openssh 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/RHBA-2022:7763