From 3d40cc7ab888a37a3ba085f377a057396a7d2476 Mon Sep 17 00:00:00 2001
From: Michael Tuexen <tuexen@FreeBSD.org>
Date: Wed, 8 May 2024 23:01:06 +0200
Subject: [PATCH] sctp: add missing check

If memory allocation fails, m is NULL. Since this is possible,
check for it.
Reported by:	Coverity Scan
CID:		1086866
MFC after:	3 days
---
 sys/netinet/sctp_output.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/netinet/sctp_output.c b/sys/netinet/sctp_output.c
index a8facff6b91..e0106831f06 100644
--- a/sys/netinet/sctp_output.c
+++ b/sys/netinet/sctp_output.c
@@ -6705,7 +6705,9 @@ sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
 		} else {
 			m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
 			    0, M_NOWAIT, 1, MT_DATA);
-			SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
+			if (m != NULL) {
+				SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
+			}
 		}
 		if (m != NULL) {
 			struct sctp_paramhdr *ph;