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avcodec/motionpixels: Mask pixels to valid values 

Fixes: out of array access
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MOTIONPIXELS_fuzzer-6724203352555520

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2023-01-12 23:42:59 +01:00
parent 95f0f84dae
commit ac6eec1fc2
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1 changed files with 1 additions and 1 deletions
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libavcodec/motionpixels.c
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@ -185,7 +185,7 @@ static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
int color;
color = *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
return mp_rgb_yuv_table[color];
return mp_rgb_yuv_table[color & 0x7FFF];
}
static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)