crypto: random value issues v15

[panva]

• Version: v15.0.0
• Platform: Darwin C02CX0K5MD6V 19.6.0 Darwin Kernel Version 19.6.0: Mon Aug 31 22:12:52 PDT 2020; root:xnu-6153.141.2~1/RELEASE_X86_64 x86_64
• Subsystem: crypto

What steps will reproduce the bug?

const crypto = require('crypto')

console.log(crypto.randomFillSync(Buffer.allocUnsafe(16)));

How often does it reproduce? Is there a required condition?

What is the expected behavior?

Buffer gets logged with random values

What do you see instead?

Buffer gets logged with only zeroes

Additional information

[targos]

@nodejs/crypto

[richardlau]

Seems to fail on the current master branch (6b6bbfe) too.

[ai]

Potentially it can be a huge security issue.