From: Jouni Malinen <j@w1.fi>
Date: Sat, 11 Oct 2014 16:41:33 +0000 (+0300)
Subject: DFS: Check os_get_random() result
X-Git-Tag: hostap_2_4~1339
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c0e5b58f998af8f018a227adec5cad5ff80bee3;p=thirdparty%2Fhostap.git

DFS: Check os_get_random() result

This use does not really need a strong random number, so fall back to
os_random() if a theoretical error case occurs. (CID 72682)

Signed-off-by: Jouni Malinen <j@w1.fi>
---

diff --git a/src/ap/dfs.c b/src/ap/dfs.c
index a6ec20bd9..6fc891c7a 100644
--- a/src/ap/dfs.c
+++ b/src/ap/dfs.c
@@ -440,7 +440,8 @@ dfs_get_valid_channel(struct hostapd_iface *iface,
 	if (num_available_chandefs == 0)
 		return NULL;
 
-	os_get_random((u8 *) &_rand, sizeof(_rand));
+	if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
+		_rand = os_random();
 	chan_idx = _rand % num_available_chandefs;
 	dfs_find_channel(iface, &chan, chan_idx, skip_radar);