Re: Kernel RNG ???

[Fredrik Pettai <pettai%nordu.net@localhost>]

Hi,

I’ve stumbled upon this too with recently upgraded machine (to NetBSD 8.0_BETA (GENERIC.201803261630Z))

Kernel RNG “5887 68 5” runs test FAILURE: too many runs of 1 1s (2691 >=2685)
cprng 5887 68 5: failed statistical RNG test

The difference here is that the machine also loses network connectivity (& the USB keyboard).
unplugging / replugging the keyboard doesn’t show that the kernel is still working on the console.
(you’d expect to see output about the usb device unplugged / replugged)

I also tried to add a watchdog to reboot the server then it hangs, but that isn’t working, so it’s a weird state it hangs in…

# wdogctl
Available watchdog timers:
        ipmi0, 0 second period
        tco0, 30 second period [armed, user tickle, pid 441]

Any ideas ?

/P

> On 20 May 2015, at 23:46, Paul Goyette <paul%vps1.whooppee.com@localhost> wrote:
> 
> Perhaps we could make the messages a little bit less frightening?
> 
> Perhaps s/FAILURE/NOTICE/
> 
> 
> 
> On Wed, 20 May 2015, Christos Zoulas wrote:
> 
>> In article <Pine.NEB.4.64.1505201111400.29987%6bone.informatik.uni-leipzig.de@localhost>,
>> <6bone%6bone.informatik.uni-leipzig.de@localhost> wrote:
>>> Hello,
>>> 
>>> dmesg reported:
>>> 
>>> Kernel RNG "2105 0 2" runs test FAILURE: too many runs of 3 1s (728 > 723)
>>> cprng 2105 0 2: failed statistical RNG test
>>> 
>>> Any ideas what could be the problem?
>>> 
>>> 
>>> kernel version: NetBSD 7.99.9
>>> distribution: netbsd-7 (version May 11)
>> 
>> It is not really a problem. Things like this can happen. If you see messages
>> like this continuously, then there is a problem. In current a bunch of RNG
>> diagnostic messages have been turned on in order to evaluate the quality
>> of the random number generation.
>> 
>> christos
>> 
>> 
> 
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