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On 10/12/2016 06:10 PM, Zack Weinberg wrote:
On Wed, Oct 12, 2016 at 11:58 AM, Florian Weimer <fweimer@redhat.com> wrote:Can the system call really block indefinitely, or only for a long time and (ie, will return eventually)?Yes, if the system enters a deadlock condition where the waiting for randomness prevents it from accumulating additional randomness.This is what happens here: <https://bugzilla.redhat.com/show_bug.cgi?id=1383060>... How about we make the kernel not start userspace at all until the RNG is fully operational?
The RNG is initialized from user space, using a saved seed from disk (which is better than no randomness at all).
Florian
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