Here is Richard's W.M. Jones answer:

> This is caused by a bug in the way that supermin created symlinks
> which is not compatible with the new kernel:
> 
>   291 l bzfgrep          120777 6 0:0 -> \x1c\v
> 
> You need to upgrade to the new supermin which fixes this.

> https://www.redhat.com/archives/libguestfs/2017-July/msg00089.html
> https://github.com/libguestfs/supermin/commit/158854e3ba4be7f6b8d81f662ddad98358ede1de
> https://bugzilla.redhat.com/show_bug.cgi?id=1470157

or alternatively you can rebuild appliance if you have older kernel version around.
See https://bugzilla.redhat.com/show_bug.cgi?id=1470157#c11 on how to do that.