From: Holger Schurig <hs4233@mail.mn-solutions.de>
Date: Fri, 11 Sep 2009 08:13:55 +0000 (+0200)
Subject: cfg80211: minimal error handling for wext-compat freq scanning
X-Git-Tag: firefly_0821_release~11864^2~297^2~47
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=012a1b3e5e3561376dacf07efee15688284302c6;p=firefly-linux-kernel-4.4.55.git

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>
---

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 6c20b6515ab0..e5f92ee758f4 100644
--- 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;