From 2bfc7ce3ecc3420aa4d60ac24fec8c7c9b3ab1e6 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sun, 17 May 2026 19:22:44 +0200
Subject: [PATCH] avformat/mccdec: dont pass NULL to bytestream2_put_buffer()

Fixes: passing NULL pointer

Found-by: iceray-Li
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/mccdec.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavformat/mccdec.c b/libavformat/mccdec.c
index 4384704f32..9d72e5545e 100644
--- a/libavformat/mccdec.c
+++ b/libavformat/mccdec.c
@@ -313,7 +313,8 @@ static int mcc_read_header(AVFormatContext *s)
 
             if (v >= 16 && v <= 35) {
                 int idx = v - 16;
-                bytestream2_put_buffer(&pb, aliases[idx].value, aliases[idx].len);
+                if (aliases[idx].len)
+                    bytestream2_put_buffer(&pb, aliases[idx].value, aliases[idx].len);
             } else {
                 uint8_t vv;