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avformat/matroskadec: Check before allocations 

That way one doesn't have to free later. In this case (concerning TTA
extradata), this also fixes a memleak when the output samplerate is
invalid.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2019-12-03 18:09:03 +01:00 committed by James Almer
parent 94fd85d81d
commit f7bf59b431
1 changed files with 13 additions and 14 deletions
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27
libavformat/matroskadec.c
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@ -2545,6 +2545,19 @@ static int matroska_parse_tracks(AVFormatContext *s)
memcpy(&extradata[12], track->codec_priv.data,
track->codec_priv.size);
} else if (codec_id == AV_CODEC_ID_TTA) {
if (track->audio.channels > UINT16_MAX ||
track->audio.bitdepth > UINT16_MAX) {
av_log(matroska->ctx, AV_LOG_WARNING,
"Too large audio channel number %"PRIu64
" or bitdepth %"PRIu64". Skipping track.\n",
track->audio.channels, track->audio.bitdepth);
if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
return AVERROR_INVALIDDATA;
else
continue;
}
if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
return AVERROR_INVALIDDATA;
extradata_size = 30;
extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!extradata)
@ -2553,22 +2566,8 @@ static int matroska_parse_tracks(AVFormatContext *s)
NULL, NULL, NULL, NULL);
avio_write(&b, "TTA1", 4);
avio_wl16(&b, 1);
if (track->audio.channels > UINT16_MAX ||
track->audio.bitdepth > UINT16_MAX) {
av_log(matroska->ctx, AV_LOG_WARNING,
"Too large audio channel number %"PRIu64
" or bitdepth %"PRIu64". Skipping track.\n",
track->audio.channels, track->audio.bitdepth);
av_freep(&extradata);
if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
return AVERROR_INVALIDDATA;
else
continue;
}
avio_wl16(&b, track->audio.channels);
avio_wl16(&b, track->audio.bitdepth);
if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
return AVERROR_INVALIDDATA;
avio_wl32(&b, track->audio.out_samplerate);
avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
track->audio.out_samplerate,