From: Ujjal Roy <royujjal@gmail.com>
Date: Thu, 9 Jan 2014 15:46:14 +0000 (+0530)
Subject: cfg80211: add sanity check for retry limit in wext-compat
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f5aa0d21dd5ada040ff42b4d40357285e4ace441;p=linux-beck.git

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>
---

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;