On Thu, Nov 21, 2013 at 05:03:11PM -0800, Kees Cook wrote: > Hi, > > On Thu, Nov 21, 2013 at 11:03:50AM -0800, Greg KH wrote: > > On Wed, Nov 20, 2013 at 12:50:49PM -0500, Vivek Goyal wrote: > > > This patch implements the in kernel kexec functionality. It implements a > > > new system call kexec_file_load. I think parameter list of this system > > > call will change as I have not done the kernel image signature handling > > > yet. I have been told that I might have to pass the detached signature > > > and size as part of system call. > > > > This could be done as we do with modules, and just tack the signature > > onto the end of the 'blob' of the image. That way we could use the same > > tool to sign the binary as we do for modules, and save the need for > > extra parameters in the syscall. > > As long as the system call passing in an fd, I'm all good. For those > of us that run from verified filesystems, we don't need the additional > signing overhead, but we do need the file descriptor to validate the > origin of the kernel. Yep, Greg had mentioned that keep the interface file descriptor based so that it can work well with LSM hooks and that's why I went with it. Thanks Vivek
