Sorry, at the moment I'm blind.
Could anyone give me a hint, about my surely obvious mistake.
*Problem*
rhel8.5 / podman version 3.4.2 the following command fails.
(rootless) podman pull docker.io/library/mariadb:latest
...
Error: writing blob: adding layer with blob
"sha256:08c01a0ec47e82ebe2bec112f373d160983a6d1e9e66627f66a3322bc403221b":
Error processing tar file(exit status 1): potentially insufficient UIDs
or GIDs available in user namespace (requested 0:42 for /etc/gshadow):
Check /etc/subuid and /etc/subgid: lchown /etc/gshadow: invalid argument
*but*
cat /etc/subuid
me:100000:99999
cat /etc/subgid
me:100000:99999
The same command runs fine on fedora 35 / podman version 3.4.4 .
Regards
Uwe