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h264_sei: check SEI size

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Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Michael Niedermayer 2013-09-19 16:26:25 +02:00 committed by Anton Khirnov
parent 71cabb521a
commit 84df6d6a85
1 changed files with 6 additions and 0 deletions
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6
libavcodec/h264_sei.c
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@ -190,6 +190,12 @@ int ff_h264_decode_sei(H264Context *h)
size += show_bits(&h->gb, 8);
while (get_bits(&h->gb, 8) == 255);
if (size > get_bits_left(&h->gb) / 8) {
av_log(h->avctx, AV_LOG_ERROR, "SEI type %d truncated at %d\n",
type, get_bits_left(&h->gb));
return AVERROR_INVALIDDATA;
}
switch (type) {
case SEI_TYPE_PIC_TIMING: // Picture timing SEI
ret = decode_picture_timing(h);