random: fix locking in crng_fast_load()

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crng_init is protected by primary_crng->lock, so keep holding that lock
when incrementing crng_init from 0 to 1 in crng_fast_load(). The call to
pr_notice() can wait until the lock is released; this code path cannot
be reached twice, as crng_fast_load() aborts early if crng_init > 0.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

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Dominik Brodowski 2022-02-05 11:34:57 +01:00 • committed by Jason A. Donenfeld

parent 77760fd7f7

commit 7c2fe2b32b

1 changed files with 3 additions and 2 deletions

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drivers/char/random.c

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