Nested vng cannot exec init from mounted /home

[iii-i]

I have a machine where /home is on a separate disk. I cannot use nested vng there:

linux$ ../virtme-ng/vng --mem=2G
virtme-ng linux$ ../virtme-ng/vng --verbose
[    5.137474] Kernel panic - not syncing: Requested init /home/<redacted>/virtme-ng/virtme/guest/virtme-init failed (error -5).

This comes from the following kernel code in fuse_lookup():

│      438         err = -EIO;
│      439         if (inode && get_node_id(inode) == FUSE_ROOT_ID)
│      440                 goto out_iput;

I have not debugged this further, because I figured --announce-submounts would fix this, which it did. This must be related to #50.

[arighi]

Hm... unfortunately enabling --annouce-submounts would re-introduce #50. This happens only in a nested vng, right? Do you need --announce-submounts only in the nested guest or both?

[iii-i]

I needed it in the first-level guest, but not in the nested guest. I think I better fully debug this, otherwise there is a risk that we introduce something that works only by accident.