Re: [PATCH] x86, random: Fix get_random_bytes() warning in x86 start_kernel

[Theodore Y. Ts'o]

On Tue, May 29, 2018 at 11:01:07AM -0400, Prarit Bhargava wrote:
> Kees, in early boot no pool is available so the stack canary is initialized 
> from
> the TSC.  Later in boot, the stack canary will use the the crng.
> 
> ie) in early boot only TSC is okay, and late boot (when crng_ready() is true)
> the pool will be used.

But that means all of the kernel threads (e.g., workqueues, et. al)
would not be well protected by the stack canary.  That
seems.... rather unfortunate.

                                             - Ted