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avcodec/h266_metadata_bsf: Check if there are CodedBitstreamFragment units

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Fixes: NULL pointer dereference
Fixes: 60269/clusterfuzz-testcase-minimized-ffmpeg_BSF_VVC_METADATA_fuzzer-5215449416335360

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>
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Michael Niedermayer 2023-07-23 19:52:35 +02:00
parent 574f3aaeff
commit c5c719f030
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1 changed files with 1 additions and 1 deletions
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libavcodec/h266_metadata_bsf.c
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@ -43,7 +43,7 @@ static int h266_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
int err, i;
// If an AUD is present, it must be the first NAL unit.
if (pu->units[0].type == VVC_AUD_NUT) {
if (pu->nb_units && pu->units[0].type == VVC_AUD_NUT) {
if (ctx->aud == BSF_ELEMENT_REMOVE)
ff_cbs_delete_unit(pu, 0);
} else if ( pkt && ctx->aud == BSF_ELEMENT_INSERT) {