This is working as intended according to the Linux kernel VFS design for idmapped mounts:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/namei.c?id=1c3e8cef79ea5f1415cff0d3c507e2e07b71ade8#n650
If either UID or GID...
I'm trying the new mount-point ID mapping feature introduced in Proxmox VE 9.2 with an Ubuntu 26.04 LTS unprivileged container.
The host is running the latest PVE packages with kernel 7.0.14-12-pve.
On the host, the shared directory is owned by...