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avformat/utils: Fix potential integer overflow in extract_extradata()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-09-27 00:00:26 +02:00
parent b4a1ccfc41
commit 0a41a8bf29
1 changed files with 3 additions and 1 deletions
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4
libavformat/utils.c
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@ -3544,7 +3544,9 @@ static int extract_extradata(AVStream *st, AVPacket *pkt)
&extradata_size); &extradata_size);
if (extradata) { if (extradata) {
sti->avctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE); av_assert0(!sti->avctx->extradata);
if ((unsigned)extradata_size < FF_MAX_EXTRADATA_SIZE)
sti->avctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!sti->avctx->extradata) { if (!sti->avctx->extradata) {
av_packet_unref(pkt_ref); av_packet_unref(pkt_ref);
return AVERROR(ENOMEM); return AVERROR(ENOMEM);