From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Suykov Date: Fri, 13 Mar 2015 02:20:17 +0200 Subject: [Buildroot] [PATCH] move random-seed from /etc to /var/lib In-Reply-To: <8761a5hlbr.fsf@dell.be.48ers.dk> References: <20150312002013.GA11018@vostro> <8761a5hlbr.fsf@dell.be.48ers.dk> Message-ID: <20150313002017.GA11581@vostro> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Fri, Mar 13, 2015 at 12:01:28AM +0100, Peter Korsgaard wrote: > >>>>> "Alex" == Alex Suykov 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. Buildroot does not support such layout at present but with /etc/mtab and /etc/resolv.conf already out of /etc, it's one step away. > 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.