alamb commented on a change in pull request #8973:
URL: https://github.com/apache/arrow/pull/8973#discussion_r547954350
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File path: rust/arrow/src/compute/kernels/comparison.rs
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@@ -451,15 +453,17 @@ where
let rem = len % lanes;
for i in (0..len - rem).step_by(lanes) {
- let simd_left = T::load(left.value_slice(i, lanes));
+ let simd_left = T::load(unsafe { left.value_slice(i, lanes) });
let simd_result = op(simd_left, simd_right);
T::bitmask(&simd_result, |b| {
result.extend_from_slice(b);
});
}
if rem > 0 {
- let simd_left = T::load(left.value_slice(len - rem, lanes));
+ //Soundness
+ // This is not sound because it can read past the end of
PrimitiveArray buffer (lanes is always greater than rem), see ARROW-10990
Review comment:
🤣
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