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ICU-22509 Limit the dateStyle and timeStyle in fuzzer to only valid enum

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Frank Tang 2023-09-18 17:33:04 -07:00 • committed by Frank Yung-Fong Tang
parent 6df1babae2
commit 990779c4bf
1 changed files with 27 additions and 7 deletions
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34
icu4c/source/test/fuzzer/date_format_fuzzer.cpp
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@ -12,20 +12,40 @@
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
uint16_t rnd;
uint8_t rnd2;
UDate date;
icu::DateFormat::EStyle dateStyle;
icu::DateFormat::EStyle timeStyle;
if (size < sizeof(rnd) + sizeof(date) + sizeof(dateStyle) + sizeof(timeStyle)) return 0;
icu::DateFormat::EStyle styles[] = {
icu::DateFormat::EStyle::kNone,
icu::DateFormat::EStyle::kFull,
icu::DateFormat::EStyle::kLong,
icu::DateFormat::EStyle::kMedium,
icu::DateFormat::EStyle::kShort,
icu::DateFormat::EStyle::kDateOffset,
icu::DateFormat::EStyle::kDateTime,
icu::DateFormat::EStyle::kDateTimeOffset,
icu::DateFormat::EStyle::kRelative,
icu::DateFormat::EStyle::kFullRelative,
icu::DateFormat::EStyle::kLongRelative,
icu::DateFormat::EStyle::kMediumRelative,
icu::DateFormat::EStyle::kShortRelative,
};
int32_t numStyles = sizeof(styles) / sizeof(icu::DateFormat::EStyle);
if (size < sizeof(rnd) + sizeof(date) + 2*sizeof(rnd2)) return 0;
icu::StringPiece fuzzData(reinterpret_cast<const char *>(data), size);
std::memcpy(&rnd, fuzzData.data(), sizeof(rnd));
fuzzData.remove_prefix(sizeof(rnd));
icu::Locale locale = GetRandomLocale(rnd);
std::memcpy(&dateStyle, fuzzData.data(), sizeof(dateStyle));
fuzzData.remove_prefix(sizeof(dateStyle));
std::memcpy(&timeStyle, fuzzData.data(), sizeof(timeStyle));
fuzzData.remove_prefix(sizeof(timeStyle));
std::memcpy(&rnd2, fuzzData.data(), sizeof(rnd2));
icu::DateFormat::EStyle dateStyle = styles[rnd2 % numStyles];
fuzzData.remove_prefix(sizeof(rnd2));
std::memcpy(&rnd2, fuzzData.data(), sizeof(rnd2));
icu::DateFormat::EStyle timeStyle = styles[rnd2 % numStyles];
fuzzData.remove_prefix(sizeof(rnd2));
std::memcpy(&date, fuzzData.data(), sizeof(date));
fuzzData.remove_prefix(sizeof(date));