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Re: [kernel-hardening] [PATCH v4 05/13] crypto/rng: ensure that the RNG is ready before using

From Theodore Ts'o <tytso@mit.edu>
Newsgroups linux.kernel
Subject Re: [kernel-hardening] [PATCH v4 05/13] crypto/rng: ensure that the RNG is ready before using
Date 2017-06-08 02:50 +0200
Message-ID <tPTO9-5uW-7@gated-at.bofh.it> (permalink)
References <tPqM9-3tE-3@gated-at.bofh.it> <tPqVR-3xj-33@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Jun 06, 2017 at 07:47:56PM +0200, Jason A. Donenfeld wrote:
> Otherwise, we might be seeding the RNG using bad randomness, which is
> dangerous. The one use of this function from within the kernel -- not
> from userspace -- is being removed (keys/big_key), so that call site
> isn't relevant in assessing this.

The use in keys/big_key is _being_ removed, so this commit is
dependent on that commit landing, correct?  (Order matters, because
otherwise we don't want to potentially screw up doing a kernel bisect
and causing their kernel to deadlock during the boot while they are
trying to track down an unreleated problem.)

       	  	     		   - Ted

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Re: [kernel-hardening] [PATCH v4 05/13] crypto/rng: ensure that the  RNG is ready before using Theodore Ts'o <tytso@mit.edu> - 2017-06-08 02:50 +0200

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