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avcodec/hevc_ps: Check cpb_cnt_minus1 before storing it 

Fixes: index 32 out of bounds for type 'uint32_t [32]'
Fixes: 63003/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-4685160840560640

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-10-18 01:50:25 +02:00
parent 70f5fa6325
commit 5feceed008
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GPG Key ID: B18E8928B3948D64
1 changed files with 4 additions and 3 deletions
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7
libavcodec/hevc_ps.c
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@ -417,12 +417,13 @@ static int decode_hrd(GetBitContext *gb, int common_inf_present,
hdr->flags.low_delay_hrd_flag = get_bits1(gb);
if (!hdr->flags.low_delay_hrd_flag) {
hdr->cpb_cnt_minus1[i] = get_ue_golomb_long(gb);
if (hdr->cpb_cnt_minus1[i] > 31) {
unsigned cpb_cnt_minus1 = get_ue_golomb_long(gb);
if (cpb_cnt_minus1 > 31) {
av_log(NULL, AV_LOG_ERROR, "nb_cpb %d invalid\n",
hdr->cpb_cnt_minus1[i]);
cpb_cnt_minus1);
return AVERROR_INVALIDDATA;
}
hdr->cpb_cnt_minus1[i] = cpb_cnt_minus1;
}
if (hdr->flags.nal_hrd_parameters_present_flag)