mac80211: sanity check for null SSID
While associated we should never have empty SSID, but life can be full
of surprises, and is allways better to print a warning than crash.
Before memcpy() in ieee80211_probereq_get() check ssid_len instead of
ssid pointer, sice pointer it always passed by "ssidie + 2" expression
to send probe functions, so practically never can be NULL.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 14a01c8..e0b8978 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2602,7 +2602,7 @@
pos = skb_put(skb, ie_ssid_len);
*pos++ = WLAN_EID_SSID;
*pos++ = ssid_len;
- if (ssid)
+ if (ssid_len)
memcpy(pos, ssid, ssid_len);
pos += ssid_len;