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lavc/midivid: check return value of init_get_bits8() 

Fix CID 1456088

Signed-off-by: Zhong Li <zhongli_dev@126.com>
This commit is contained in:
Zhong Li 2019-12-23 14:14:09 +00:00 committed by Paul B Mahol
parent 94ad5d0128
commit 5dc527f9ca
1 changed files with 4 additions and 2 deletions
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6
libavcodec/midivid.c
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@ -63,7 +63,7 @@ static int decode_mvdv(MidiVidContext *s, AVCodecContext *avctx, AVFrame *frame)
if (intra_flag) {
nb_blocks = (avctx->width / 2) * (avctx->height / 2);
} else {
int skip_linesize;
int ret, skip_linesize;
nb_blocks = bytestream2_get_le32(gb);
skip_linesize = avctx->width >> 1;
@ -73,7 +73,9 @@ static int decode_mvdv(MidiVidContext *s, AVCodecContext *avctx, AVFrame *frame)
if (bytestream2_get_bytes_left(gb) < mask_size)
return AVERROR_INVALIDDATA;
init_get_bits8(&mask, mask_start, mask_size);
ret = init_get_bits8(&mask, mask_start, mask_size);
if (ret < 0)
return ret;
bytestream2_skip(gb, mask_size);
skip = s->skip;