Fix heap-use-after-free.

2023-03-25 11:03:30 +08:00
parent ce357b14c9
commit 223b1d8f9b
1 changed files with 6 additions and 0 deletions
--- a/src/gausskernel/runtime/executor/nodeHashjoin.cpp
+++ b/src/gausskernel/runtime/executor/nodeHashjoin.cpp
@ -1141,6 +1141,12 @@ void ExecEarlyFreeHashJoin(HashJoinState* node)
    if (node->hj_HashTable) {
        ExecHashTableDestroy(node->hj_HashTable);
        node->hj_HashTable = NULL;
+        /*
+         * HashState.hashtable also point to hj_HashTable(check ExecHashJoin),
+         * so set it to null directly to avoid heap-use-after-free
+         */
+        HashState* hash_state = (HashState*)innerPlanState(node);
+        hash_state->hashtable = NULL;
    }

    /*