From 6e4197dee5ff051f2daf1327faf1683fe350264f Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Wed, 12 Jun 2024 22:49:48 +0200
Subject: [PATCH] extensions: libxt_sctp: Add an extra assert()

JIRA: https://issues.redhat.com/browse/RHEL-40928
Upstream Status: iptables commit 0234117d24609070f08ef36a11795c3c8e4c19bf

commit 0234117d24609070f08ef36a11795c3c8e4c19bf
Author: Phil Sutter <phil@nwl.cc>
Date:   Fri May 17 15:20:05 2024 +0200

    extensions: libxt_sctp: Add an extra assert()

    The code is sane, but this keeps popping up in static code analyzers.

    Signed-off-by: Phil Sutter <phil@nwl.cc>

Signed-off-by: Phil Sutter <psutter@redhat.com>
---
 extensions/libxt_sctp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/extensions/libxt_sctp.c b/extensions/libxt_sctp.c
index 6e2b274..e8312f0 100644
--- a/extensions/libxt_sctp.c
+++ b/extensions/libxt_sctp.c
@@ -7,6 +7,7 @@
  * libipt_ecn.c borrowed heavily from libipt_dscp.c
  *
  */
+#include <assert.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <string.h>
@@ -354,6 +355,7 @@ print_chunk_flags(uint32_t chunknum, uint8_t chunk_flags, uint8_t chunk_flags_ma
 
 	for (i = 7; i >= 0; i--) {
 		if (chunk_flags_mask & (1 << i)) {
+			assert(chunknum < ARRAY_SIZE(sctp_chunk_names));
 			if (chunk_flags & (1 << i)) {
 				printf("%c", sctp_chunk_names[chunknum].valid_flags[7-i]);
 			} else {