In the Linux kernel, the following vulnerability has been resolved:

crypto: sun4i-ss - Remove insecure and unused rng_alg

Remove sun4i_ss_rng, as it is insecure and unused:

- It has multiple vulnerabilities.  sun4i_ss_prng_seed() is missing
  locking and has a buffer overflow.  sun4i_ss_prng_generate() fails to
  fill the entire buffer with cryptographic random bytes, because it
  rounds the destination length down and also doesn't actually wait for
  the hardware to be ready before pulling bytes from it.

- No user of this code is known.  It's usable only theoretically via the
  "rng" algorithm type of AF_ALG.  But userspace actually just uses the
  actual Linux RNG (/dev/random etc) instead.  And rng_algs don't
  contribute entropy to the actual Linux RNG either.  (This may have
  been confused with hwrng, which does contribute entropy.)

The sun4i_ss_prng_seed() buffer overflow was reported by Tianchu Chen
and discovered by Atuin - Automated Vulnerability Discovery Engine

There's no point in fixing all these vulnerabilities individually when
this is unused code, so let's just remove it.

https://git.kernel.org/stable/c/2eafecaba1b46bb9774eaf3556619fd5b6a17c1c

https://git.kernel.org/stable/c/306ded31bfa00a69d25823a60d7c797170bfb4f8

https://git.kernel.org/stable/c/9c8086d9511189c34dfa3f9e3a03f2bee12f56a5

https://git.kernel.org/stable/c/b2c41fa9dd8fc740c489e060b199165771f268d1

https://git.kernel.org/stable/c/c401492e01c7bfd38cf14c94d85c7efafe7d1a25

https://git.kernel.org/stable/c/e4b7b9819811c4c51064c3d3d3c02f0be7491707

https://git.kernel.org/stable/c/ee2458f8188732aa53a5d42f56e87bfad288b44e

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