cprng x y z: failed statistical RNG test

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

After switching to a DIAGNOSTIC+DEBUG+LOCKDEBUG (8.1) kernel, I get lots of
messages I haven't seen before:

Kernel RNG "3348 0 0" long run test FAILURE: Run of 26 0s found
cprng 3348 0 0: failed statistical RNG test
Kernel RNG "6079 29 0" long run test FAILURE: Run of 26 1s found
cprng 6079 29 0: failed statistical RNG test
Kernel RNG "18472 1 0" long run test FAILURE: Run of 26 0s found
cprng 18472 1 0: failed statistical RNG test
Kernel RNG "6467 1 0" long run test FAILURE: Run of 26 0s found
cprng 6467 1 0: failed statistical RNG test
Kernel RNG "24433 5 3" runs test FAILURE: too many runs of 5 1s (211 >= 209)
cprng 24433 5 3: failed statistical RNG test
Kernel RNG "3914 0 0" poker test failure: parameter X = 2.960
cprng 3914 0 0: failed statistical RNG test
Kernel RNG "3947 0 0" poker test failure: parameter X = 49.51040
cprng 3947 0 0: failed statistical RNG test
Kernel RNG "20014 0 1" runs test FAILURE: too many runs of 1 1s (2688 >= 2685)
cprng 20014 0 1: failed statistical RNG test
Kernel RNG "22038 48 1" long run test FAILURE: Run of 27 1s found
cprng 22038 48 1: failed statistical RNG test
Kernel RNG "27178 1 1" runs test FAILURE: too few runs of 1 0s (2308 <= 2315)
cprng 27178 1 1: failed statistical RNG test
Kernel RNG "29061 9 4" runs test FAILURE: too few runs of 3 1s (526 <= 527)
cprng 29061 9 4: failed statistical RNG test
Kernel RNG "28659 2 6" poker test failure: parameter X = 1.79840
cprng 28659 2 6: failed statistical RNG test
Kernel RNG "22021 11 8" long run test FAILURE: Run of 28 0s found
cprng 22021 11 8: failed statistical RNG test
Kernel RNG "16081 0 0" long run test FAILURE: Run of 26 0s found
cprng 16081 0 0: failed statistical RNG test
Kernel RNG "25242 0 1" poker test failure: parameter X = 48.53120
cprng 25242 0 1: failed statistical RNG test
Kernel RNG "11772 0 1" long run test FAILURE: Run of 26 0s found
cprng 11772 0 1: failed statistical RNG test
Kernel RNG "9936 1 0" runs test FAILURE: too many runs of 1 0s (2708 >= 2685)
cprng 9936 1 0: failed statistical RNG test
Kernel RNG "13842 1 7" long run test FAILURE: Run of 26 0s found
cprng 13842 1 7: failed statistical RNG test
Kernel RNG "7761 1 0" runs test FAILURE: too few runs of 2 1s (1110 <= 1114)
cprng 7761 1 0: failed statistical RNG test
Kernel RNG "16658 15 0" monobit test FAILURE: 10298 ones
cprng 16658 15 0: failed statistical RNG test
Kernel RNG "6892 5 1" long run test FAILURE: Run of 27 0s found
cprng 6892 5 1: failed statistical RNG test

This was all within an hour. Is it something to worry about?