cfg80211: add sanity check for retry limit in wext-compat

Block setting the wrong values through iwconfig retry
command. Add sanity checking before sending the retry
limit to the driver.

Signed-off-by: Ujjal Roy <royujjal@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 051d961d4e28..5661a54ac7ee 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -370,7 +370,7 @@ static int cfg80211_wext_siwretry(struct net_device *dev,
         u8 oshort = wdev->wiphy->retry_short;
         int err;
 
-        if (retry->disabled ||
+        if (retry->disabled || retry->value < 1 || retry->value > 255 ||
             (retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
                 return -EINVAL;