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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-04-09 14:31:16 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-04-14 17:56:44 +0200 |
| commit | 80ac1fd1483a4b3c92a6e59d24cb050dfecb90df (patch) | |
| tree | 01b9312badb09edfb8611d2993ca2052f92252f7 /libavcodec/hevc_ps.c | |
| parent | 27e7857bd1127974ffe1512293abee83b1035194 (diff) | |
| download | ffmpeg-80ac1fd1483a4b3c92a6e59d24cb050dfecb90df.tar.gz | |
avcodec/hevc_ps: Check num_ref_loc_offsets
Fixes: Writing arbitrarily over the array end
Fixes: 57812/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-4536557859373056
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/hevc_ps.c')
| -rw-r--r-- | libavcodec/hevc_ps.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c index 348e4d8de2..be1d668c26 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -1392,6 +1392,10 @@ static int pps_multilayer_extension(GetBitContext *gb, AVCodecContext *avctx, pps->pps_scaling_list_ref_layer_id = get_bits(gb, 6); pps->num_ref_loc_offsets = get_ue_golomb_long(gb); + if (pps->num_ref_loc_offsets > FF_ARRAY_ELEMS(pps->ref_loc_offset_layer_id)) { + pps->num_ref_loc_offsets = 0; + return AVERROR_INVALIDDATA; + } for (int i = 0; i < pps->num_ref_loc_offsets; i++) { pps->ref_loc_offset_layer_id[i] = get_bits(gb, 6); pps->scaled_ref_layer_offset_present_flag[i] = get_bits1(gb); |