On 11/18/2013 09:35 PM, Eric Blake wrote:
> On 11/18/2013 08:20 AM, Daniel P. Berrange wrote:
>
>>> static const char *const defaultDeviceACL[] = {
>>> "/dev/null", "/dev/full", "/dev/zero",
>>> - "/dev/random", "/dev/urandom",
>>> + "/dev/random", "/dev/urandom", "/dev/hwrng",
>>> "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
>>> "/dev/rtc", "/dev/hpet", "/dev/vfio/vfio",
>>> NULL,
>>
>> NACK, for any device listed in the XML, we should add it in the per-VM
>> cgroups setup code.
>>
>> The existing /dev/random & /dev/urandom devices are there because they
>> are used for basic crypto libraries unrelated to the XML config.
>
> /dev/urandom, probably. /dev/random - really? Isn't that a DoS
> potential for one guest to starve entropy from other guests, in spite of
> sVirt?
I think you are right ..
>
>> The
>> /dev/hwrng device does not fall into this scenario.
>
> Agreed.
>
--
Regards,
Pradipta
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