diff options
| -rw-r--r-- | sys/dev/random/randomdev_soft.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/dev/random/randomdev_soft.c b/sys/dev/random/randomdev_soft.c index c73e098..6f4851b 100644 --- a/sys/dev/random/randomdev_soft.c +++ b/sys/dev/random/randomdev_soft.c @@ -296,6 +296,10 @@ random_harvest_internal(u_int64_t somecounter, const void *entropy, { struct harvest *event; + /* Lockless read to avoid lock operations if fifo is full. */ + if (harvestfifo[origin].count >= RANDOM_FIFO_MAX) + return; + /* Lock the particular fifo */ mtx_lock_spin(&harvestfifo[origin].lock); |
