From: lucien <>

3.4.113-rc1 review patch.  If anyone has any objections, please let me know.


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 <>
Signed-off-by: Marcelo Ricardo Leitner <>
Acked-by: Neil Horman <>
Acked-by: Vlad Yasevich <>
Signed-off-by: David S. Miller <>
Signed-off-by: Zefan Li <>
 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 333926d..075e353 100644
--- a/net/sctp/auth.c
+++ b/net/sctp/auth.c
@@ -804,8 +804,8 @@ 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] = 
        ep->auth_hmacs_list->param_hdr.length = htons(sizeof(sctp_paramhdr_t) +
                                hmacs->shmac_num_idents * sizeof(__u16));
        return 0;

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