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Date: Mon, 9 Nov 2015 14:11:35 -0500
From: Theodore Tso <tytso@...gle.com>
To: Jason Cooper <kernel-hardening@...edaemon.net>
Cc: kernel-hardening@...ts.openwall.com, Emese Revfy <re.emese@...il.com>,
Kees Cook <keescook@...omium.org>, PaX Team <pageexec@...email.hu>,
Brad Spengler <spender@...ecurity.net>, Greg KH <gregkh@...uxfoundation.org>,
Josh Triplett <josh@...htriplett.org>
Subject: Re: Re: Proposal for kernel self protection features
On Mon, Nov 9, 2015 at 2:02 PM, Jason Cooper <
kernel-hardening@...edaemon.net> wrote:
> /var/lib/misc/random-seed has served that role for years, I'm only
> advocating loading it earlier in the boot process. It's *much* harder
> to guess the state of random-seed than the dtb or mac address(es)...
>
If the bootloader is willing to reach into the file system, which means (a)
having a minimal file system layer, like Grub does, and (b) can find the
block device where the file is found, that's a perfectly *fine*
implementation. I'm not sure mobile handset vendors will be all that
psyched into either using or replicating all of Grub's functionality so it
could do that, though....
-- Ted
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