From 9980a0b9b1ff1872c2ac37e9a709529421446ed5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 23 Apr 2025 01:36:43 +0200 Subject: [PATCH] avformat/iamfdec: Check side_substream_id before use MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fixes: poc-iamf-2025-04 Found-by: 苏童 <220235212@seu.edu.cn> Signed-off-by: Michael Niedermayer --- libavformat/iamfdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/iamfdec.c b/libavformat/iamfdec.c index 0f273bdd43..3a6276dcde 100644 --- a/libavformat/iamfdec.c +++ b/libavformat/iamfdec.c @@ -126,7 +126,7 @@ static int iamf_read_header(AVFormatContext *s) // Swap back and side stream ids as our native channel layout ordering doen't match the // order from ITU-R - BS.2051-3 for Systems I and J (where side channels come before back ones). - if (back_substream_id >= 0 && av_channel_layout_compare(&layer->ch_layout, + if (back_substream_id >= 0 && side_substream_id >= 0 && av_channel_layout_compare(&layer->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_9POINT1POINT6)) { const IAMFSubStream *back_substream = &audio_element->substreams[back_substream_id]; const IAMFSubStream *side_substream = &audio_element->substreams[side_substream_id];