2 files changed, 7 insertions, 2 deletions

diff --git a/net/sctp/auth.c b/net/sctp/auth.c
index 1fcb4cf2f4c9..52db5f60daa0 100644
--- a/net/sctp/auth.c
+++ b/net/sctp/auth.c
@@ -786,6 +786,9 @@ int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep,
         for (i = 0; i < hmacs->shmac_num_idents; i++) {
                 id = hmacs->shmac_idents[i];
 
+                if (id > SCTP_AUTH_HMAC_ID_MAX)
+                        return -EOPNOTSUPP;
+
                 if (SCTP_AUTH_HMAC_ID_SHA1 == id)
                         has_sha1 = 1;
 
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 9b9b2c31dd15..5ffb9dec1c3f 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3086,6 +3086,7 @@ static int sctp_setsockopt_hmac_ident(struct sock *sk,
                                     int optlen)
 {
         struct sctp_hmacalgo *hmacs;
+        u32 idents;
         int err;
 
         if (!sctp_auth_enable)
@@ -3103,8 +3104,9 @@ static int sctp_setsockopt_hmac_ident(struct sock *sk,
                 goto out;
         }
 
-        if (hmacs->shmac_num_idents == 0 ||
-            hmacs->shmac_num_idents > SCTP_AUTH_NUM_HMACS) {
+        idents = hmacs->shmac_num_idents;
+        if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS ||
+            (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) {
                 err = -EINVAL;
                 goto out;
         }