[PATCH 62/81] net: sctp: sctp_endpoint_free: zero out secret key data

From: Herton Ronaldo Krzesinski
Date: Tue Feb 19 2013 - 14:01:27 EST -stable review patch. If anyone has any objections, please let me know.


From: Daniel Borkmann <dborkman@xxxxxxxxxx>

commit b5c37fe6e24eec194bb29d22fdd55d73bcc709bf upstream.

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@xxxxxxxxxx>
Acked-by: Vlad Yasevich <vyasevic@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@xxxxxxxxxxxxx>
net/sctp/endpointola.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c
index 68a385d..58cd035 100644
--- a/net/sctp/endpointola.c
+++ b/net/sctp/endpointola.c
@@ -248,6 +248,8 @@ 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. */
@@ -270,6 +272,9 @@ static void sctp_endpoint_destroy(struct sctp_endpoint *ep)

+ 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)

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/