cfg80211: minimal error handling for wext-compat freq scanning

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
git-mirror · Sep 23, 2009 · 012a1b3 · 012a1b3
1 parent 50425b0
commit 012a1b3
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
@@ -675,6 +675,11 @@ int cfg80211_wext_siwscan(struct net_device *dev,
 		wext_freq_not_found: ;
 		}
 	}
+	/* No channels found? */
+	if (!i) {
+		err = -EINVAL;
+		goto out;
+	}
 
 	/* Set real number of channels specified in creq->channels[] */
 	creq->n_channels = i;