linux-kernel - [PATCH 3.14 172/238] regulatory: add NUL to alpha2

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Message-Id: <20141003212919.174644564@linuxfoundation.org>
Date:	Fri,  3 Oct 2014 14:31:27 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Eliad Peller <eliadx.peller@...el.com>,
	Johannes Berg <johannes.berg@...el.com>
Subject: [PATCH 3.14 172/238] regulatory: add NUL to alpha2

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eliad Peller <eliad@...ery.com>

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@...el.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/net/regulatory.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -160,7 +160,7 @@ 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[];
 };


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