We have a customer that is having an issue with their .bashrc looping.

It appears that it may be treating the bash command in the .bashrc as a login shell when logging in via ssh, but not when logging in via other methods.

They were able to narrow down the issue to the following test case:

Tested with root user:

cd $HOME
mv .bashrc .bashrc_bak

vi .bashrc

then put this line into .bashrc and save the file

echo $(/bin/bash -c 'echo Hello')

Then

ssh localhost

This appears to loop forever when logging in via ssh.

However a normal console login works properly, and using 'su - root' works properly.

Also this appears to only affect RHEL 9, and works properly on RHEL 8.