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swscale/swscale_unscaled: Fix odd height inputs for bayer_to_yv12_wrapper() 

Fixes: 372d2df1f04b49e25f109f07f90b1505/asan_heap-oob_2835d2e_8501_99e0114d7ba3a6db885d0b4684d200c1.cine
Fixes out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 757248ea3c)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-01-17 00:55:44 +01:00
parent 262192a48b
commit 93c675d6a6
1 changed files with 6 additions and 1 deletions
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7
libswscale/swscale_unscaled.c
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@ -1109,6 +1109,8 @@ static int bayer_to_yv12_wrapper(SwsContext *c, const uint8_t* src[], int srcStr
default: return 0;
}
av_assert0(srcSliceH > 1);
copy(srcPtr, srcStride[0], dstY, dstU, dstV, dstStride[0], c->srcW, c->input_rgb2yuv_table);
srcPtr += 2 * srcStride[0];
dstY += 2 * dstStride[0];
@ -1123,7 +1125,10 @@ static int bayer_to_yv12_wrapper(SwsContext *c, const uint8_t* src[], int srcStr
dstV += dstStride[1];
}
copy(srcPtr, srcStride[0], dstY, dstU, dstV, dstStride[0], c->srcW, c->input_rgb2yuv_table);
if (i + 1 == srcSliceH) {
copy(srcPtr, -srcStride[0], dstY, dstU, dstV, -dstStride[0], c->srcW, c->input_rgb2yuv_table);
} else if (i < srcSliceH)
copy(srcPtr, srcStride[0], dstY, dstU, dstV, dstStride[0], c->srcW, c->input_rgb2yuv_table);
return srcSliceH;
}