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fix invalid read

This commit is contained in:
Hongze Cheng 2020-07-08 21:33:10 +08:00
parent 0011214385
commit 1f72417ee6
1 changed files with 11 additions and 1 deletions
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12
src/util/src/tskiplist.c
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@ -498,7 +498,17 @@ void tSkipListRemoveNode(SSkipList *pSkipList, SSkipListNode *pNode) {
if (pSkipList->lock) { if (pSkipList->lock) {
pthread_rwlock_wrlock(pSkipList->lock); pthread_rwlock_wrlock(pSkipList->lock);
} }
if (pSkipList->size == 1) {
assert(pSkipList->lastKey == SL_GET_NODE_KEY(pSkipList, pNode));
pSkipList->lastKey = 0;
} else {
if (pSkipList->lastKey == SL_GET_NODE_KEY(pSkipList, pNode)) {
SSkipListNode* prev = SL_GET_BACKWARD_POINTER(pNode, 0);
pSkipList->lastKey = SL_GET_NODE_KEY(pSkipList, prev);
}
}
for (int32_t j = level - 1; j >= 0; --j) { for (int32_t j = level - 1; j >= 0; --j) {
SSkipListNode* prev = SL_GET_BACKWARD_POINTER(pNode, j); SSkipListNode* prev = SL_GET_BACKWARD_POINTER(pNode, j);
SSkipListNode* next = SL_GET_FORWARD_POINTER(pNode, j); SSkipListNode* next = SL_GET_FORWARD_POINTER(pNode, j);