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Code Issues Releases Activity

mmvideo/mm_decode_inter: check horizontal coordinate too

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Fixes out of array accesses

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-05-02 21:52:08 +02:00
parent fd68371b07
commit 8d3c99e825
1 changed files with 2 additions and 0 deletions
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libavcodec/mmvideo.c
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@ -151,6 +151,8 @@ static int mm_decode_inter(MmContext * s, int half_horiz, int half_vert)
int replace_array = bytestream2_get_byte(&s->gb);
for(j=0; j<8; j++) {
int replace = (replace_array >> (7-j)) & 1;
if (x + half_horiz >= s->avctx->width)
return AVERROR_INVALIDDATA;
if (replace) {
int color = bytestream2_get_byte(&data_ptr);
s->frame.data[0][y*s->frame.linesize[0] + x] = color;