1 files changed, 53 insertions, 21 deletions

diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 9270771702fe..33cd16901378 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -13,6 +13,7 @@
  */
 
 #include <linux/if_arp.h>
+#include <linux/etherdevice.h>
 #include <linux/rtnetlink.h>
 #include <linux/pm_qos.h>
 #include <net/sch_generic.h>
@@ -103,16 +104,35 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
 	cbss->free_priv = ieee80211_rx_bss_free;
 	bss = (void *)cbss->priv;
 
+	if (elems->parse_error) {
+		if (beacon)
+			bss->corrupt_data |= IEEE80211_BSS_CORRUPT_BEACON;
+		else
+			bss->corrupt_data |= IEEE80211_BSS_CORRUPT_PROBE_RESP;
+	} else {
+		if (beacon)
+			bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_BEACON;
+		else
+			bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_PROBE_RESP;
+	}
+
 	/* save the ERP value so that it is available at association time */
-	if (elems->erp_info && elems->erp_info_len >= 1) {
+	if (elems->erp_info && elems->erp_info_len >= 1 &&
+			(!elems->parse_error ||
+			 !(bss->valid_data & IEEE80211_BSS_VALID_ERP))) {
 		bss->erp_value = elems->erp_info[0];
 		bss->has_erp_value = true;
+		if (!elems->parse_error)
+			bss->valid_data |= IEEE80211_BSS_VALID_ERP;
 	}
 
-	if (elems->tim) {
+	if (elems->tim && (!elems->parse_error ||
+			   !(bss->valid_data & IEEE80211_BSS_VALID_DTIM))) {
 		struct ieee80211_tim_ie *tim_ie =
 			(struct ieee80211_tim_ie *)elems->tim;
 		bss->dtim_period = tim_ie->dtim_period;
+		if (!elems->parse_error)
+				bss->valid_data |= IEEE80211_BSS_VALID_DTIM;
 	}
 
 	/* If the beacon had no TIM IE, or it was invalid, use 1 */
@@ -120,26 +140,38 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
 		bss->dtim_period = 1;
 
 	/* replace old supported rates if we get new values */
-	srlen = 0;
-	if (elems->supp_rates) {
-		clen = IEEE80211_MAX_SUPP_RATES;
-		if (clen > elems->supp_rates_len)
-			clen = elems->supp_rates_len;
-		memcpy(bss->supp_rates, elems->supp_rates, clen);
-		srlen += clen;
-	}
-	if (elems->ext_supp_rates) {
-		clen = IEEE80211_MAX_SUPP_RATES - srlen;
-		if (clen > elems->ext_supp_rates_len)
-			clen = elems->ext_supp_rates_len;
-		memcpy(bss->supp_rates + srlen, elems->ext_supp_rates, clen);
-		srlen += clen;
+	if (!elems->parse_error ||
+	    !(bss->valid_data & IEEE80211_BSS_VALID_RATES)) {
+		srlen = 0;
+		if (elems->supp_rates) {
+			clen = IEEE80211_MAX_SUPP_RATES;
+			if (clen > elems->supp_rates_len)
+				clen = elems->supp_rates_len;
+			memcpy(bss->supp_rates, elems->supp_rates, clen);
+			srlen += clen;
+		}
+		if (elems->ext_supp_rates) {
+			clen = IEEE80211_MAX_SUPP_RATES - srlen;
+			if (clen > elems->ext_supp_rates_len)
+				clen = elems->ext_supp_rates_len;
+			memcpy(bss->supp_rates + srlen, elems->ext_supp_rates,
+			       clen);
+			srlen += clen;
+		}
+		if (srlen) {
+			bss->supp_rates_len = srlen;
+			if (!elems->parse_error)
+				bss->valid_data |= IEEE80211_BSS_VALID_RATES;
+		}
 	}
-	if (srlen)
-		bss->supp_rates_len = srlen;
 
-	bss->wmm_used = elems->wmm_param || elems->wmm_info;
-	bss->uapsd_supported = is_uapsd_supported(elems);
+	if (!elems->parse_error ||
+	    !(bss->valid_data & IEEE80211_BSS_VALID_WMM)) {
+		bss->wmm_used = elems->wmm_param || elems->wmm_info;
+		bss->uapsd_supported = is_uapsd_supported(elems);
+		if (!elems->parse_error)
+			bss->valid_data |= IEEE80211_BSS_VALID_WMM;
+	}
 
 	if (!beacon)
 		bss->last_probe_resp = jiffies;
@@ -176,7 +208,7 @@ ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
 	presp = ieee80211_is_probe_resp(fc);
 	if (presp) {
 		/* ignore ProbeResp to foreign address */
-		if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
+		if (compare_ether_addr(mgmt->da, sdata->vif.addr))
 			return RX_DROP_MONITOR;
 
 		presp = true;