sctp: check asoc peer.asconf_capable before processing asconf

asconf chunks should be dropped when the asoc doesn't support
asconf feature.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 2c244b29a199..0c21c52fc408 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3721,7 +3721,8 @@ enum sctp_disposition sctp_sf_do_asconf(struct net *net,
          * is received unauthenticated it MUST be silently discarded as
          * described in [I-D.ietf-tsvwg-sctp-auth].
          */
-        if (!net->sctp.addip_noauth && !chunk->auth)
+        if (!asoc->peer.asconf_capable ||
+            (!net->sctp.addip_noauth && !chunk->auth))
                 return sctp_sf_discard_chunk(net, ep, asoc, type, arg,
                                              commands);
 
@@ -3863,7 +3864,8 @@ enum sctp_disposition sctp_sf_do_asconf_ack(struct net *net,
          * is received unauthenticated it MUST be silently discarded as
          * described in [I-D.ietf-tsvwg-sctp-auth].
          */
-        if (!net->sctp.addip_noauth && !asconf_ack->auth)
+        if (!asoc->peer.asconf_capable ||
+            (!net->sctp.addip_noauth && !asconf_ack->auth))
                 return sctp_sf_discard_chunk(net, ep, asoc, type, arg,
                                              commands);