From cc7d1fd16d14acf08a20fbe3a6426d2cb4878768 Mon Sep 17 00:00:00 2001
From: Christopher James Halse Rogers
Date: Mon, 7 Aug 2017 16:10:51 +1000
Subject: lib/randutils.c: More paranoia in getrandom() call.

If getrandom() is called with nbytes ≥ 256 then it can return with less than the requested
bytes filled.

In this case we *could* adjust the buffer by the number of bytes actually read, but it's
simpler to just redo the call.
---
 lib/randutils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/randutils.c')

diff --git a/lib/randutils.c b/lib/randutils.c
index ceeb474ef..7d85dc841 100644
--- a/lib/randutils.c
+++ b/lib/randutils.c
@@ -100,7 +100,7 @@ void random_get_bytes(void *buf, size_t nbytes)
 
 #ifdef HAVE_GETRANDOM
 	errno = 0;
-	while (getrandom(buf, nbytes, 0) < 0) {
+	while (getrandom(buf, nbytes, 0) != (ssize_t)nbytes) {
 		if (errno == EINTR)
 			continue;
 		break;
-- 
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