1 files changed, 6 insertions, 0 deletions

diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
index ce8087846f05..d2048de86e7c 100644
--- a/net/sctp/chunk.c
+++ b/net/sctp/chunk.c
@@ -191,6 +191,12 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
          * the packet
          */
         max_data = asoc->frag_point;
+        if (unlikely(!max_data)) {
+                max_data = sctp_min_frag_point(sctp_sk(asoc->base.sk),
+                                               sctp_datachk_len(&asoc->stream));
+                pr_warn_ratelimited("%s: asoc:%p frag_point is zero, forcing max_data to default minimum (%Zu)",
+                                    __func__, asoc, max_data);
+        }
 
         /* If the the peer requested that we authenticate DATA chunks
          * we need to account for bundling of the AUTH chunks along with