From 7c0e5b58f998af8f018a227adec5cad5ff80bee3 Mon Sep 17 00:00:00 2001 From: Jouni Malinen Date: Sat, 11 Oct 2014 19:41:33 +0300 Subject: [PATCH] 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 --- src/ap/dfs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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);