4.14-stable review patch. If anyone has any objections, please let me know.
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From: Theodore Ts'o tytso@mit.edu
commit 0bb29a849a6433b72e249eea7695477b02056e94 upstream.
Reported-by: Jann Horn jannh@google.com Fixes: 1e7f583af67b ("random: make /dev/urandom scalable for silly...") Cc: stable@kernel.org # 4.8+ Signed-off-by: Theodore Ts'o tytso@mit.edu Reviewed-by: Jann Horn jannh@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/char/random.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -905,7 +905,7 @@ static void crng_reseed(struct crng_stat _crng_backtrack_protect(&primary_crng, buf.block, CHACHA20_KEY_SIZE); } - spin_lock_irqsave(&primary_crng.lock, flags); + spin_lock_irqsave(&crng->lock, flags); for (i = 0; i < 8; i++) { unsigned long rv; if (!arch_get_random_seed_long(&rv) && @@ -915,7 +915,7 @@ static void crng_reseed(struct crng_stat } memzero_explicit(&buf, sizeof(buf)); crng->init_time = jiffies; - spin_unlock_irqrestore(&primary_crng.lock, flags); + spin_unlock_irqrestore(&crng->lock, flags); if (crng == &primary_crng && crng_init < 2) { invalidate_batched_entropy(); numa_crng_init();