On Fri, Jun 2, 2017 at 7:41 PM, Daniel Micay <danielmicay@xxxxxxxxx> wrote: > One of the early uses is initializing the stack canary value for SSP in > very early boot. If that blocks, it's going to be blocking nearly > anything else from happening. > > On x86, that's only the initial canary since the per-task canaries end > up being used, but elsewhere at least without SMP disabled or changes to > GCC that's all there is so the entropy matters. If this is the case, then we simply need a function called get_random_bytes_but_potentially_crappy_ones_because_we_are_desperate_for_anything(), which would respond with a weaker guarantee than that get_random_bytes(), which the documentation says always returns cryptographically secure numbers.
