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lossless_(enc_|)sse2: avoid offsetting a NULL pointer

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PredictorSub0_SSE2 doesn't use 'upper' (neither does
VP8LPredictorsSub_C[0]); just pass NULL when dealing with trailing
pixels to avoid undefined behavior when offsetting a NULL pointer

BUG=chromium:1026858,oss-fuzz:19430

Change-Id: I08be8899ed2e34f26aaee34defe68dbd0fe216d3
This commit is contained in:
James Zern 2019-12-12 23:23:39 -08:00
parent e2575e05cb
commit c6b75a1966
2 changed files with 4 additions and 2 deletions
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3
src/dsp/lossless_enc_sse2.c
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@ -455,8 +455,9 @@ static void PredictorSub0_SSE2(const uint32_t* in, const uint32_t* upper,
_mm_storeu_si128((__m128i*)&out[i], res); _mm_storeu_si128((__m128i*)&out[i], res);
} }
if (i != num_pixels) { if (i != num_pixels) {
VP8LPredictorsSub_C[0](in + i, upper + i, num_pixels - i, out + i); VP8LPredictorsSub_C[0](in + i, NULL, num_pixels - i, out + i);
} }
(void)upper;
} }
#define GENERATE_PREDICTOR_1(X, IN) \ #define GENERATE_PREDICTOR_1(X, IN) \

3
src/dsp/lossless_sse2.c
View File

@ -191,8 +191,9 @@ static void PredictorAdd0_SSE2(const uint32_t* in, const uint32_t* upper,
_mm_storeu_si128((__m128i*)&out[i], res); _mm_storeu_si128((__m128i*)&out[i], res);
} }
if (i != num_pixels) { if (i != num_pixels) {
VP8LPredictorsAdd_C[0](in + i, upper + i, num_pixels - i, out + i); VP8LPredictorsAdd_C[0](in + i, NULL, num_pixels - i, out + i);
} }
(void)upper;
} }
// Predictor1: left. // Predictor1: left.