From 163b9b6c7ef66428f06f197ee56395f832545816 Mon Sep 17 00:00:00 2001
From: Zhao Zhili <zhilizhao@tencent.com>
Date: Fri, 20 Mar 2026 10:38:19 +0800
Subject: [PATCH] avformat/lcevc: return error when no valid NAL units are
 found

ff_lcvec_parse_config_record() returns success before this patch
when no IDR or NON_IDR NAL units are found.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
---
 libavformat/lcevc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libavformat/lcevc.c b/libavformat/lcevc.c
index f6a5bf1aaa..85ea96d22e 100644
--- a/libavformat/lcevc.c
+++ b/libavformat/lcevc.c
@@ -183,6 +183,7 @@ int ff_lcvec_parse_config_record(LCEVCDecoderConfigurationRecord *lvcc,
     H2645Packet h2645_pkt = { 0 };
     AVIOContext *pb;
     int ret;
+    int found;
 
     if (size <= 0)
         return AVERROR_INVALIDDATA;
@@ -221,6 +222,7 @@ int ff_lcvec_parse_config_record(LCEVCDecoderConfigurationRecord *lvcc,
         goto fail;
 
     /* look for IDR or NON_IDR */
+    found = 0;
     for (int i = 0; i < h2645_pkt.nb_nals; i++) {
         const H2645NAL *nal = &h2645_pkt.nals[i];
 
@@ -229,9 +231,15 @@ int ff_lcvec_parse_config_record(LCEVCDecoderConfigurationRecord *lvcc,
             ret = write_nalu(lvcc, pb, nal);
             if (ret < 0)
                 goto fail;
+            found = 1;
         }
     }
 
+    if (!found) {
+        ret = AVERROR_INVALIDDATA;
+        goto fail;
+    }
+
     ret = 0;
 fail:
     ffio_close_null_buf(pb);