linux-kernel - [PATCH 046/106] af_key: fix info leaks in notify messages

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Message-Id: <1375176725-5825-47-git-send-email-luis.henriques@canonical.com>
Date:	Tue, 30 Jul 2013 10:31:05 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Mathias Krause <minipli@...glemail.com>,
	Steffen Klassert <steffen.klassert@...unet.com>,
	"David S. Miller" <davem@...emloft.net>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 046/106] af_key: fix info leaks in notify messages

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

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

From: Mathias Krause <minipli@...glemail.com>

commit a5cc68f3d63306d0d288f31edfc2ae6ef8ecd887 upstream.

key_notify_sa_flush() and key_notify_policy_flush() miss to initialize
the sadb_msg_reserved member of the broadcasted message and thereby
leak 2 bytes of heap memory to listeners. Fix that.

Signed-off-by: Mathias Krause <minipli@...glemail.com>
Cc: Steffen Klassert <steffen.klassert@...unet.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 net/key/af_key.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/key/af_key.c b/net/key/af_key.c
index 34e4185..7a09bbb 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1705,6 +1705,7 @@ static int key_notify_sa_flush(const struct km_event *c)
 	hdr->sadb_msg_version = PF_KEY_V2;
 	hdr->sadb_msg_errno = (uint8_t) 0;
 	hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
+	hdr->sadb_msg_reserved = 0;
 
 	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
 
@@ -2686,6 +2687,7 @@ static int key_notify_policy_flush(const struct km_event *c)
 	hdr->sadb_msg_version = PF_KEY_V2;
 	hdr->sadb_msg_errno = (uint8_t) 0;
 	hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
+	hdr->sadb_msg_reserved = 0;
 	pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
 	return 0;
 
-- 
1.8.3.2

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