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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-31 22:36:52 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-03-13 21:02:31 +0100 |
| commit | 0c48c332eeb2866d9353125f701e099c48889463 (patch) | |
| tree | d7d5c4773c99fb602be8060f0c9deb70ee5aa639 | |
| parent | 4e7dbca74c1395082947bb1586c1da47f50b1d18 (diff) | |
| download | ffmpeg-0c48c332eeb2866d9353125f701e099c48889463.tar.gz | |
avcodec/h264_metadata_bsf: Check nb_units before accessing the first in h264_metadata_update_fragment()
Fixes: null pointer dereference
Fixes: 29835/clusterfuzz-testcase-minimized-ffmpeg_BSF_H264_METADATA_fuzzer-4712125383704576
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/h264_metadata_bsf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/h264_metadata_bsf.c b/libavcodec/h264_metadata_bsf.c index c3a63f3578..6e58c0be1d 100644 --- a/libavcodec/h264_metadata_bsf.c +++ b/libavcodec/h264_metadata_bsf.c @@ -462,7 +462,7 @@ static int h264_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt, int err, i, has_sps, seek_point; // If an AUD is present, it must be the first NAL unit. - if (au->units[0].type == H264_NAL_AUD) { + if (au->nb_units && au->units[0].type == H264_NAL_AUD) { if (ctx->aud == BSF_ELEMENT_REMOVE) ff_cbs_delete_unit(au, 0); } else { |