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Merge pull request #8702 from sfc-gh-ajbeamon/fix-ub-in-keyafter

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Fix undefined behavior in keyAfter
This commit is contained in:
Jingyu Zhou 2022-11-04 14:16:04 -07:00 committed by GitHub
commit a5a5df715b
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1 changed files with 6 additions and 2 deletions
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8
fdbclient/include/fdbclient/FDBTypes.h
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@ -553,7 +553,9 @@ inline KeyRef keyAfter(const KeyRef& key, Arena& arena) {
return allKeysEnd;
}
uint8_t* t = new (arena) uint8_t[key.size() + 1];
memcpy(t, key.begin(), key.size());
if (!key.empty()) {
memcpy(t, key.begin(), key.size());
}
t[key.size()] = 0;
return KeyRef(t, key.size() + 1);
}
@ -564,7 +566,9 @@ inline Key keyAfter(const KeyRef& key) {
}
inline KeyRangeRef singleKeyRange(KeyRef const& key, Arena& arena) {
uint8_t* t = new (arena) uint8_t[key.size() + 1];
memcpy(t, key.begin(), key.size());
if (!key.empty()) {
memcpy(t, key.begin(), key.size());
}
t[key.size()] = 0;
return KeyRangeRef(KeyRef(t, key.size()), KeyRef(t, key.size() + 1));
}