From 7fab9b97613e5ec6954fb8118f9ca43f04847cfe Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 17 Jun 2024 01:08:26 +0200 Subject: [PATCH] avformat/iamf_parse: 0 layers are not allowed Fixes: out of array access Fixes: 68302/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-4665793796177920 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: James Almer Signed-off-by: Michael Niedermayer --- 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 5c2ff6862a..12c2b9533a 100644 --- a/libavformat/iamf_parse.c +++ b/libavformat/iamf_parse.c @@ -330,7 +330,7 @@ static int scalable_channel_layout_config(void *s, AVIOContext *pb, nb_layers = avio_r8(pb) >> 5; // get_bits(&gb, 3); // skip_bits(&gb, 5); //reserved - if (nb_layers > 6) + if (nb_layers > 6 || nb_layers == 0) return AVERROR_INVALIDDATA; audio_element->layers = av_calloc(nb_layers, sizeof(*audio_element->layers));