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avcodec/scpr: Check y in first line loop in decompress_i()

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Fixes: out of array access
Fixes: 1478/clusterfuzz-testcase-minimized-5285486908145664

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-11 15:29:31 +02:00
parent 8a69f2602f
commit 7ac5067146
1 changed files with 3 additions and 0 deletions
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3
libavcodec/scpr.c
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@ -331,6 +331,9 @@ static int decompress_i(AVCodecContext *avctx, uint32_t *dst, int linesize)
clr = (b << 16) + (g << 8) + r;
k += run;
while (run-- > 0) {
if (y >= avctx->height)
return AVERROR_INVALIDDATA;
dst[y * linesize + x] = clr;
lx = x;
ly = y;