[FFmpeg-devel] [PATCH 2/9] avcodec/mpeg4audio: Check that there is enough space for the first 3 elements in ff_mpeg4audio_get_config_gb()
Michael Niedermayer
michael at niedermayer.cc
Mon Jun 17 02:08:24 EEST 2024
Fixes: out of array access
Fixes: 68863/clusterfuzz-testcase-minimized-ffmpeg_dem_IAMF_fuzzer-4833546039525376
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavcodec/mpeg4audio.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavcodec/mpeg4audio.c b/libavcodec/mpeg4audio.c
index fbd2a8f811a..ae18944f0d5 100644
--- a/libavcodec/mpeg4audio.c
+++ b/libavcodec/mpeg4audio.c
@@ -94,6 +94,10 @@ int ff_mpeg4audio_get_config_gb(MPEG4AudioConfig *c, GetBitContext *gb,
{
int specific_config_bitindex, ret;
int start_bit_index = get_bits_count(gb);
+
+ if (get_bits_left(gb) < 5+4+4)
+ return AVERROR_INVALIDDATA;
+
c->object_type = get_object_type(gb);
c->sample_rate = get_sample_rate(gb, &c->sampling_index);
c->chan_config = get_bits(gb, 4);
--
2.45.2
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