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fix out-of-bounds read in EXR extra-channel row copy #233

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fix out-of-bounds read in EXR extra-channel row copy #233

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4 changes: 2 additions & 2 deletions lib/extras/dec/exr.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -374,10 +374,10 @@ Status DecodeImageEXR(Span<const uint8_t> bytes, const ColorHints& color_hints,
const char* JPEGLI_RESTRICT input_ec_slice = input_extra_rows.data();
for (PackedImage& ec : frame.extra_channels) {
const char* const JPEGLI_RESTRICT input_ec_row =
input_ec_slice + (exr_y - start_y) * ec.stride;
input_ec_slice + (exr_y - start_y) * ec.pixel_stride() * row_size;
uint8_t* ec_row =
static_cast<uint8_t*>(ec.pixels()) + ec.stride * image_y;
input_ec_slice += ec.stride * (end_y - start_y + 1);
input_ec_slice += ec.pixel_stride() * row_size * (end_y - start_y + 1);

const char* exr_ec_ptr =
input_ec_row + (exr_x1 - dataWindow.min.x) * ec.pixel_stride();
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