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random: check for crng_init == 0 in add_device_randomness()

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commit 1daf2f3876 upstream.

This has no real functional change, as crng_pre_init_inject() (and
before that, crng_slow_init()) always checks for == 0, not >= 2. So
correct the outer unlocked change to reflect that. Before this used
crng_ready(), which was not correct.

Cc: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jason A. Donenfeld 2022-02-12 23:57:38 +01:00 committed by Greg Kroah-Hartman
parent 993d28d586
commit 0014e4fc94
1 changed files with 1 additions and 1 deletions
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2
drivers/char/random.c
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@ -1020,7 +1020,7 @@ void add_device_randomness(const void *buf, size_t size)
unsigned long time = random_get_entropy() ^ jiffies;
unsigned long flags;
if (!crng_ready() && size)
if (crng_init == 0 && size)
crng_pre_init_inject(buf, size, false, false);
spin_lock_irqsave(&input_pool.lock, flags);