netdev - [PATCH net 2/2] net: sctp: sctp_endpoint

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Date:	Fri,  8 Feb 2013 14:04:35 +0100
From:	Daniel Borkmann <dborkman@...hat.com>
To:	davem@...emloft.net
Cc:	linux-sctp@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net 2/2] net: sctp: sctp_endpoint_free: zero out secret key data

On sctp_endpoint_destroy, previously used sensitive keying material
should be zeroed out before the memory is returned, as we already do
with e.g. auth keys when released.

Signed-off-by: Daniel Borkmann <dborkman@...hat.com>
---
 net/sctp/endpointola.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c
index 17a001b..1a9c5fb 100644
--- a/net/sctp/endpointola.c
+++ b/net/sctp/endpointola.c
@@ -249,6 +249,8 @@ void sctp_endpoint_free(struct sctp_endpoint *ep)
 /* Final destructor for endpoint.  */
 static void sctp_endpoint_destroy(struct sctp_endpoint *ep)
 {
+	int i;
+
 	SCTP_ASSERT(ep->base.dead, "Endpoint is not dead", return);
 
 	/* Free up the HMAC transform. */
@@ -271,6 +273,9 @@ static void sctp_endpoint_destroy(struct sctp_endpoint *ep)
 	sctp_inq_free(&ep->base.inqueue);
 	sctp_bind_addr_free(&ep->base.bind_addr);
 
+	for (i = 0; i < SCTP_HOW_MANY_SECRETS; ++i)
+		memset(&ep->secret_key[i], 0, SCTP_SECRET_SIZE);
+
 	/* Remove and free the port */
 	if (sctp_sk(ep->base.sk)->bind_hash)
 		sctp_put_port(ep->base.sk);
-- 
1.7.11.7

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