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avcodec/hnm4video: check that packetsize is at least 8

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Fixes integer overflow and assertion failure
Fixes: signal_sigabrt_7ffff7126425_1243_CASSE.HNM

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-11-22 16:37:50 +01:00
parent 7865759409
commit ba992711f7
1 changed files with 5 additions and 0 deletions
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5
libavcodec/hnm4video.c
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@ -359,6 +359,11 @@ static int hnm_decode_frame(AVCodecContext *avctx, void *data,
int ret; int ret;
uint16_t chunk_id; uint16_t chunk_id;
if (avpkt->size < 8) {
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
return AVERROR_INVALIDDATA;
}
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret; return ret;