From: Roel Kluin <roel.kluin@gmail.com>
Date: Tue, 3 Mar 2009 21:55:21 +0000 (+0100)
Subject: cfg80211: test before subtraction on unsigned
X-Git-Tag: v2.6.29-rc8~51^2~1
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=bd05f28e1a15ae62994fe309a524695fe26dd834;p=linux.git

cfg80211: test before subtraction on unsigned

freq_diff is unsigned, so test before subtraction

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 85c9034c59b2..bd0a16c3de5e 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -380,7 +380,8 @@ static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
 
 	freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
 
-	if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff)
+	if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
+			freq_range->max_bandwidth_khz > freq_diff)
 		return false;
 
 	return true;