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avformat/mov: Check that sample_count is allocated in mov_parse_heif_items()

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Fixes: NULL pointer dereference
Fixes: 416811958/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5425269114732544

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2025-06-21 23:15:17 +02:00
parent 36c8eef42c
commit 0ffe97d9b9
1 changed files with 1 additions and 1 deletions
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libavformat/mov.c
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@ -10341,7 +10341,7 @@ static int mov_parse_heif_items(AVFormatContext *s)
st->codecpar->height = item->height;
err = sanity_checks(s, sc, item->item_id);
if (err)
if (err || !sc->sample_count)
return AVERROR_INVALIDDATA;
sc->sample_sizes[0] = item->extent_length;