wlan-ng: add a bounds check

I'm not sure where these results come from, but it can't hurt to
add a sanity check the array offset.  The .results[] array on the
next line has HFA384x_CHINFORESULT_MAX (16) elements.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/wlan-ng/prism2sta.c b/drivers/staging/wlan-ng/prism2sta.c
index dc221f2ad2278d2380564082a4cfda496482c5f7..428a9be2501069800ce960c882374206e3ff25d4 100644 (file)
--- a/drivers/staging/wlan-ng/prism2sta.c
+++ b/drivers/staging/wlan-ng/prism2sta.c
@@ -1170,6 +1170,9 @@ static void prism2sta_inf_chinforesults(wlandevice_t *wlandev,
                result = &inf->info.chinforesult.result[n];
                chan = le16_to_cpu(result->chid) - 1;
 
+               if (chan < 0 || chan >= HFA384x_CHINFORESULT_MAX)
+                       continue;
+
                chinforesult = &hw->channel_info.results.result[chan];
                chinforesult->chid = chan;
                chinforesult->anl = le16_to_cpu(result->anl);