On Tue, Nov 14, 2017 at 07:21:38AM -0500, Mimi Zohar wrote: > On Mon, 2017-11-13 at 14:09 -0800, Linus Torvalds wrote: > > On Mon, Nov 13, 2017 at 1:44 PM, David Howells <[email protected]> wrote: > > > > > > Whilst that may be true, we either have to check signatures on every bit > > > of > > > firmware that the appropriate driver doesn't say is meant to be signed or > > > not > > > bother. > > > > I vote for "not bother". > > > > Seriously, if you have firmware in /lib/firmware, and you don't trust > > it, what the hell are you doing? > > I might "trust" the files in /lib/firmware, but I also want to make > sure that they haven't changed. File signatures provide file > provenance and integrity guarantees.
Then "verify" them with signatures that you generate yourself. Like dm-verify does for the partition that you put the firmware on. thanks, greg k-h
