[3.16.y-ckt stable] Patch "sctp: translate host order to network order when setting a hmacid" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    sctp: translate host order to network order when setting a hmacid

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt22.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 99c41c611f9edc4266b55102e521c802c59ca24d Mon Sep 17 00:00:00 2001
From: lucien <lucien.xin at gmail.com>
Date: Thu, 12 Nov 2015 13:07:07 +0800
Subject: sctp: translate host order to network order when setting a hmacid

commit ed5a377d87dc4c87fb3e1f7f698cba38cd893103 upstream.

now sctp auth cannot work well when setting a hmacid manually, which
is caused by that we didn't use the network order for hmacid, so fix
it by adding the transformation in sctp_auth_ep_set_hmacs.

even we set hmacid with the network order in userspace, it still
can't work, because of this condition in sctp_auth_ep_set_hmacs():

		if (id > SCTP_AUTH_HMAC_ID_MAX)
			return -EOPNOTSUPP;

so this wasn't working before and thus it won't break compatibility.

Fixes: 65b07e5d0d09 ("[SCTP]: API updates to suport SCTP-AUTH extensions.")
Signed-off-by: Xin Long <lucien.xin at gmail.com>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner at gmail.com>
Acked-by: Neil Horman <nhorman at tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevich at gmail.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 net/sctp/auth.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/sctp/auth.c b/net/sctp/auth.c
index fb7976aee61c..603c3bbc5923 100644
--- a/net/sctp/auth.c
+++ b/net/sctp/auth.c
@@ -800,8 +800,8 @@ int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep,
 	if (!has_sha1)
 		return -EINVAL;

-	memcpy(ep->auth_hmacs_list->hmac_ids, &hmacs->shmac_idents[0],
-		hmacs->shmac_num_idents * sizeof(__u16));
+	for (i = 0; i < hmacs->shmac_num_idents; i++)
+		ep->auth_hmacs_list->hmac_ids[i] = htons(hmacs->shmac_idents[i]);
 	ep->auth_hmacs_list->param_hdr.length = htons(sizeof(sctp_paramhdr_t) +
 				hmacs->shmac_num_idents * sizeof(__u16));
 	return 0;