* Ritesh Raj Sarraf <r...@debian.org>, 2023-01-10 18:43:
The man page says that hostfs kernel param is "used to confine all hostfs mounts to within the specified directory tree on the host". But it's trivial to escape this confinements with ../ sequences:

   # mount none -t hostfs -o ../../../../../../../../home/bob/secrets /mnt

Could you please share the kernel command line option passed to the running uml instance ?

I used with something like this:

   $ linux hostfs=/srv/chroots/unstable-i386/ rootfstype=hostfs init=/bin/sh 
quiet

--
Jakub Wilk

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