Merge tag 'asm-generic-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd...

[linux.git] / net / sctp / chunk.c

diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
index ce8087846f05947d2990f6b6deebcadc7c255ac1..d2048de86e7c267d11b6fadd16535ddd7d8fc1b4 100644 (file)
--- 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