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Re: [Qemu-devel] [PATCH] VirtIO-RNG: Update default entropy source to `/
Daniel P . Berrangé
Re: [Qemu-devel] [PATCH] VirtIO-RNG: Update default entropy source to `/dev/urandom`
Fri, 3 May 2019 16:49:05 +0100
On Fri, May 03, 2019 at 05:46:13PM +0200, Kashyap Chamarthy wrote:
> When QEMU exposes a VirtIO-RNG device to the guest, that device needs a
> source of entropy, and that source needs to be "non-blocking", like
> `/dev/urandom`. However, currently QEMU defaults to the problematic
> `/dev/random`, which is "blocking" (as in, it waits until sufficient
> entropy is available).
> So change the entropy source to the recommended `/dev/urandom`.
> Related discussion in these past threads.
>  https://lists.nongnu.org/archive/html/qemu-devel/2018-06/msg08335.html
> -- "RNG: Any reason QEMU doesn't default to `/dev/urandom`?"
>  https://lists.nongnu.org/archive/html/qemu-devel/2018-09/msg02724.html
> -- "[RFC] Virtio RNG: Consider changing the default entropy source to
> Signed-off-by: Kashyap Chamarthy <address@hidden>
> backends/rng-random.c | 2 +-
> qemu-options.hx | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
Reviewed-by: Daniel P. Berrangé <address@hidden>
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