From 04ecca792fe8c4bfb9a8a2f580e6f3740258feee Mon Sep 17 00:00:00 2001
From: almogyalin <almog.yalin@gmail.com>
Date: Wed, 29 Jul 2026 07:02:38 +0000
Subject: [PATCH] avformat/iamf_parse: fix inverted subblock duration
 validation

The check on variable subblock durations had an inverted comparison, rejecting valid multi-subblock parameters and failing to catch subblock durations exceeding the remaining time.
---
 libavformat/iamf_parse.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/iamf_parse.c b/libavformat/iamf_parse.c
index 4c2df2c9e6..37d7e04f7b 100644
--- a/libavformat/iamf_parse.c
+++ b/libavformat/iamf_parse.c
@@ -668,7 +668,7 @@ static int param_parse(void *s, IAMFContext *c, AVIOContext *pb,
 
         if (constant_subblock_duration == 0) {
             subblock_duration = ffio_read_leb(pb);
-            if (duration - total_duration > subblock_duration) {
+            if (subblock_duration > duration - total_duration) {
                 av_log(s, AV_LOG_ERROR, "Invalid subblock durations in parameter_id %u\n", parameter_id);
                 av_free(param);
                 return AVERROR_INVALIDDATA;