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fix: the utf8_range simd validation routines (avx2, ... in lemire-avx2.c #27154

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fix: the utf8_range simd validation routines (avx2, ... in lemire-avx2.c #27154

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6 changes: 4 additions & 2 deletions third_party/utf8_range/lemire-avx2.c
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Original file line number Diff line number Diff line change
Expand Up @@ -214,8 +214,10 @@ int utf8_lemire_avx2(const unsigned char *src, int len) {
// last part
if (i < len) {
char buffer[32];
memset(buffer, 0, 32);
memcpy(buffer, src + i, len - i);
size_t tail = (size_t)(len - i);
if (tail > sizeof(buffer)) tail = sizeof(buffer);
memset(buffer, 0, sizeof(buffer));
memcpy(buffer, src + i, tail);
__m256i current_bytes = _mm256_loadu_si256((const __m256i *)(buffer));
previous = avxcheckUTF8Bytes(current_bytes, &previous, &has_error);
} else {
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