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mjpeg: abort decoding if packet is too large.

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Ronald S. Bultje 2012-02-23 12:22:40 -08:00
parent 46b3fbc30b
commit ab492ca2ab
1 changed files with 4 additions and 0 deletions
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4
libavcodec/mjpegdec.c
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@ -1458,6 +1458,10 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
/* EOF */
if (start_code < 0) {
goto the_end;
} else if (unescaped_buf_size > (1U<<29)) {
av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
start_code, unescaped_buf_ptr, buf_size);
return AVERROR_INVALIDDATA;
} else {
av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
start_code, buf_end - buf_ptr);