[PATCH v3 0/5] random: use computational hash for entropy extraction, and related fixes

From: Jason A. Donenfeld
Date: Sat Feb 05 2022 - 11:01:41 EST


The bulk of the motivation for this and description of crypto
vulnerabilities is in the first patch of this series. The following
three patches then fix up entropy accounting for the new model. The last
patch fixes a minor code safety issue.

This v3 fixes comments and commit message wording, simplifies a bit of
code in a cmpxchg loop, and adjusts semantics around the poll write
wakeup threshold.

Jason A. Donenfeld (5):
random: use computational hash for entropy extraction
random: simplify entropy debiting
random: use linear min-entropy accumulation crediting
random: always wake up entropy writers after extraction
random: make credit_entropy_bits() always safe

drivers/char/random.c | 501 ++++++----------------------------
include/trace/events/random.h | 30 +-
2 files changed, 87 insertions(+), 444 deletions(-)

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2.35.0