[Buildroot] [PATCH] move random-seed from /etc to /var/lib

Peter Korsgaard peter at korsgaard.com
Fri Mar 13 06:20:33 UTC 2015


>>>>> "Alex" == Alex Suykov <alex.suykov at gmail.com> writes:

 >> > In case / is mounted read-only, /etc is likely to be read-only
 >> > as well, so the seed will not be saved.
 >> 
 >> But if rootfs is RO, so will /var/lib then?
 > Common (I think?) setup is to have ro / and rw /var on some
 > kind of persistent storage. This way /etc typically remains
 > a part of read-only root.

I don't know how common this is. Projects I've worked with have done the
opposite (RO rootfs with a R/W overlay on top of /etc).

 >> I would rather get rid of the static random_seed file instead. Seeding
 >> all Buildroot based devices with a RO rootfs from the same 512 bytes of
 >> data can hardly be helpful for security.

> Agreed. Currently the initial file is only used to check for rw filesystem.
 > That's not necessary, and easy to fix. Sending a patch.

Not only that - If you have a RO /etc then the system gets initialized
with the "our" seed on every boot.

-- 
Bye, Peter Korsgaard 


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