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rmdec: Reject invalid deinterleaving parameters

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Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Laurent Aimar 2011-09-17 00:05:13 +02:00 committed by Martin Storsjö
parent b4ed3d78cb
commit f06068bbd6
1 changed files with 31 additions and 26 deletions
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57
libavformat/rmdec.c
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@ -194,18 +194,6 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
st->codec->codec_tag);
switch (ast->deint_id) {
case DEINT_ID_GENR:
case DEINT_ID_INT0:
case DEINT_ID_INT4:
case DEINT_ID_SIPR:
case DEINT_ID_VBRS:
case DEINT_ID_VBRF:
break;
default:
av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id);
return AVERROR_INVALIDDATA;
}
switch (st->codec->codec_id) {
case CODEC_ID_AC3:
st->need_parsing = AVSTREAM_PARSE_FULL;
@ -214,13 +202,6 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
st->codec->extradata_size= 0;
ast->audio_framesize = st->codec->block_align;
st->codec->block_align = coded_framesize;
if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
return -1;
}
av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
break;
case CODEC_ID_COOK:
case CODEC_ID_ATRAC3:
@ -251,13 +232,6 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
}
if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
return ret;
if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
return -1;
}
av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
break;
case CODEC_ID_AAC:
avio_rb16(pb); avio_r8(pb);
@ -277,6 +251,37 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
default:
av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
}
if (ast->deint_id == DEINT_ID_INT4 ||
ast->deint_id == DEINT_ID_GENR ||
ast->deint_id == DEINT_ID_SIPR) {
if (st->codec->block_align <= 0 ||
ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
ast->audio_framesize * sub_packet_h < st->codec->block_align)
return AVERROR_INVALIDDATA;
if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
return AVERROR(ENOMEM);
}
switch (ast->deint_id) {
case DEINT_ID_INT4:
if (ast->coded_framesize > ast->audio_framesize ||
ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
return AVERROR_INVALIDDATA;
break;
case DEINT_ID_GENR:
if (ast->sub_packet_size <= 0 ||
ast->sub_packet_size > ast->audio_framesize)
return AVERROR_INVALIDDATA;
break;
case DEINT_ID_SIPR:
case DEINT_ID_INT0:
case DEINT_ID_VBRS:
case DEINT_ID_VBRF:
break;
default:
av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id);
return AVERROR_INVALIDDATA;
}
if (read_all) {
avio_r8(pb);
avio_r8(pb);