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-rw-r--r--net/sctp/output.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sctp/output.c b/net/sctp/output.c
index 97745351d58c..9844fe573029 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c
@@ -705,7 +705,8 @@ static sctp_xmit_t sctp_packet_can_append_data(struct sctp_packet *packet,
/* Check whether this chunk and all the rest of pending data will fit
* or delay in hopes of bundling a full sized packet.
*/
- if (chunk->skb->len + q->out_qlen >= transport->pathmtu - packet->overhead)
+ if (chunk->skb->len + q->out_qlen >
+ transport->pathmtu - packet->overhead - sizeof(sctp_data_chunk_t) - 4)
/* Enough data queued to fill a packet */
return SCTP_XMIT_OK;