Don't dereference IEEE80211_CHAN_ANYC pointer in ieee80211_node_checkrssi().

Problem reported by Gregoire Jadi on bugs@

diff --git a/sys/net80211/ieee80211_node.c b/sys/net80211/ieee80211_node.c
index 57641fa..4951e37 100644 (file)
--- a/sys/net80211/ieee80211_node.c
+++ b/sys/net80211/ieee80211_node.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ieee80211_node.c,v 1.124 2017/12/12 13:38:10 phessler Exp $   */
+/*     $OpenBSD: ieee80211_node.c,v 1.125 2017/12/12 13:58:19 stsp Exp $       */
 /*     $NetBSD: ieee80211_node.c,v 1.14 2004/05/09 09:18:47 dyoung Exp $       */
 
 /*-
@@ -995,6 +995,9 @@ ieee80211_node_checkrssi(struct ieee80211com *ic,
 {
        uint8_t thres;
 
+       if (ni->ni_chan == IEEE80211_CHAN_ANYC)
+               return 0;
+
        if (ic->ic_max_rssi) {
                thres = (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) ?
                    IEEE80211_RSSI_THRES_RATIO_2GHZ :