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-rw-r--r--libavcodec/ituh263dec.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index c37f872..c1005b0 100644
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -1218,6 +1218,11 @@ int ff_h263_decode_picture_header(MpegEncContext *s)
if ((ret = av_image_check_size(s->width, s->height, 0, s)) < 0)
return ret;
+ if (!(s->avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
+ if ((s->width * s->height / 256 / 8) > get_bits_left(&s->gb))
+ return AVERROR_INVALIDDATA;
+ }
+
s->mb_width = (s->width + 15) / 16;
s->mb_height = (s->height + 15) / 16;
s->mb_num = s->mb_width * s->mb_height;
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