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avcodec/qdrw: check bytes per scanline for 2bpp images

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One byte less is read in case of small width.
Closes #6194.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-02-27 14:15:11 +01:00
parent 86ab6b6e08
commit 26a7d6a301
1 changed files with 4 additions and 1 deletions
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5
libavcodec/qdrw.c
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@ -81,7 +81,10 @@ static int decode_rle_bpp2(AVCodecContext *avctx, AVFrame *p, GetByteContext *gb
int pos = 0;
/* size of packed line */
size = left = bytestream2_get_be16(gbc);
if (offset / 4 > 200)
size = left = bytestream2_get_be16(gbc);
else
size = left = bytestream2_get_byte(gbc);
if (bytestream2_get_bytes_left(gbc) < size)
return AVERROR_INVALIDDATA;