From: Eliad Peller <eliad@wizery.com>
Date: Wed, 11 Jun 2014 07:23:35 +0000 (+0300)
Subject: regulatory: add NUL to alpha2
X-Git-Tag: v3.16.4~98
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5fa0d9cc1bd63272ff585e7b4495b2132b43547e;p=thirdparty%2Fkernel%2Fstable.git

regulatory: add NUL to alpha2

commit a5fe8e7695dc3f547e955ad2b662e3e72969e506 upstream.

alpha2 is defined as 2-chars array, but is used in multiple
places as string (e.g. with nla_put_string calls), which
might leak kernel data.

Solve it by simply adding an extra char for the NULL
terminator, making such operations safe.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/include/net/regulatory.h b/include/net/regulatory.h
index 259992444e80a..dad7ab20a8cb2 100644
--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -167,7 +167,7 @@ struct ieee80211_reg_rule {
 struct ieee80211_regdomain {
 	struct rcu_head rcu_head;
 	u32 n_reg_rules;
-	char alpha2[2];
+	char alpha2[3];
 	enum nl80211_dfs_regions dfs_region;
 	struct ieee80211_reg_rule reg_rules[];
 };