Public bug reported:

Binary package hint: mountall

I'm using pam_namespaces in my PAM configuration (mainly to have /tmp and 
/var/tmp mapped into my encrypted $HOME, so that private temp files do not end 
up on the not yet encrypted root partition). However, having different 
namespaces means that udisks will run in a different namespace than my user, so 
it will mount removable drives (like DVD) in the other namespace than mine - 
resulting in e.g. the file manager being unable to open the newly mounted (but 
yet unreachable) directory. To solve this, I created another /media mount point 
on /tmp and was planning to call mount --make-shared on it, to make these 
mounts show through. Googling a little, I found that
none /media tmpfs defaults,noexec,nodev,auto 0 0
none /media none make-shared 0 0
should solve my issue - which mount -a confirms to be correct. However, 
mountall has two issues: it will ignore all lines except the last for the same 
mount point, and it will do nothing with fstype = none, since such a file 
system is indeed unknown - it does not understand the special syntax.

** Affects: mountall (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/705178

Title:
  pam_namespaces and --make-shared vs mountall

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