If we get zero bytes from an entropy source, we should obviously do
nothing with this input. But it's not clear that entropy_processor()
really ignores zero bytes as expected, so let's explicitly ignore
such input.
Signed-off-by: Nadav Har'El <n...@scylladb.com>
---
bsd/sys/dev/random/live_entropy_sources.cc | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/bsd/sys/dev/random/live_entropy_sources.cc
b/bsd/sys/dev/random/live_entropy_sources.cc
index bc7a0e9..b36d0ac 100644
--- a/bsd/sys/dev/random/live_entropy_sources.cc
+++ b/bsd/sys/dev/random/live_entropy_sources.cc
@@ -171,6 +171,9 @@ live_entropy_sources_feed(int rounds, event_proc_f
entropy_processor)
/* FIXME: Whine loudly if this didn't work. */
n = les->rsource->read(buf, sizeof(buf));
n = MIN(n, HARVESTSIZE);
+ if (n == 0) {
+ continue;
+ }
event.somecounter = get_cyclecount();
event.size = n;
@@ -209,4 +212,4 @@ SYSINIT(random_adaptors, SI_SUB_DRIVERS, SI_ORDER_FIRST,
live_entropy_sources_init, NULL);
SYSUNINIT(random_adaptors, SI_SUB_DRIVERS, SI_ORDER_FIRST,
live_entropy_sources_deinit, NULL);
-#endif
\ No newline at end of file
+#endif
--
2.7.4
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