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fortuna: Drop global lock to zero stack variables

Description

fortuna: Drop global lock to zero stack variables

Also drop explicit zeroing of hash context -- hash finish() operation is
expected to do this.

PR: 230877
Suggested by: delphij@
Reviewed by: delphij, markm
Approved by: secteam (delphij)
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D16986

Details

Provenance
cemAuthored on Oct 26 2018, 9:00 PM
Parents
rG9a88479843e2: Fortuna: fix a correctness issue in reseed (fortuna_pre_read)
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