[FFmpeg-devel] [PATCH 3/9] avformat/iamf_parse: Try to use less space after the array
Michael Niedermayer
michael at niedermayer.cc
Mon Jun 17 02:08:25 EEST 2024
Fixes: out of array access
Fixes: 68584/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-6256656668229632
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavformat/iamf_parse.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavformat/iamf_parse.c b/libavformat/iamf_parse.c
index 312090b247c..5c2ff6862a7 100644
--- a/libavformat/iamf_parse.c
+++ b/libavformat/iamf_parse.c
@@ -355,6 +355,9 @@ static int scalable_channel_layout_config(void *s, AVIOContext *pb,
substream_count = avio_r8(pb);
coupled_substream_count = avio_r8(pb);
+ if (substream_count + k > audio_element->nb_substreams)
+ return AVERROR_INVALIDDATA;
+
audio_element->layers[i].substream_count = substream_count;
audio_element->layers[i].coupled_substream_count = coupled_substream_count;
if (output_gain_is_present_flag) {
--
2.45.2
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