We found a memory leak when we fuzzing the project

```sh
==252387==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 4224 byte(s) in 132 object(s) allocated from:
0x4cffd2: calloc at /root/llvm/src/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:154:3
153 : ENSURE_ASAN_INITED();
154 >: GET_STACK_TRACE_MALLOC;
155 : return asan_calloc(nmemb, size, &stack);

0x549d0c: priority_queue_add at /root/workspace/comdb2/sources/util/priority_queue.c:93:30
92 :
93 >: priority_queue_item_t *i = calloc(1, sizeof(priority_queue_item_t));
94 :

0x5482b3: thdpool_enqueue at /root/workspace/comdb2/sources/util/thdpool.c:1066:28
1065 : }
1066 >: int queue_rc = priority_queue_add(&pool->queue, priority, item);
1067 :

0x56da49: __memp_sync_int at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:1431:14
1430 :
1431 >: t_ret = thdpool_enqueue(trickle_thdpool,
1432 : trickle_do_work, range, 0, NULL, 0,

0x56da49: __memp_sync_int at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:1431:14
1430 :
1431 >: t_ret = thdpool_enqueue(trickle_thdpool,
1432 : trickle_do_work, range, 0, NULL, 0,

0x674c67: __memp_trickle at /root/workspace/comdb2/sources/berkdb/mp/mp_trickle.c:116:8
115 : of clean pages. So here we write all modified pages to disk. */
116 >: ret = __memp_sync_int(dbenv, NULL, n,
117 : lru ? DB_SYNC_LRU : DB_SYNC_TRICKLE, nwrotep, 1, NULL, 0);

0x66a37a: __memp_trickle_pp at /root/workspace/comdb2/sources/berkdb/mp/mp_trickle.c:49:8
48 : __env_rep_enter(dbenv);
49 >: ret = __memp_trickle(dbenv, pct, nwrotep, lru);
50 : if (rep_check)

0x7ed752: memp_trickle_thread at /root/workspace/comdb2/sources/bdb/threads.c:118:14
117 : again:
118 >: rc = bdb_state->dbenv->memp_trickle(
119 : bdb_state->dbenv, bdb_state->attr->memptricklepercent, &nwrote, 1);

0x9421: start_thread at ??:0:0

Direct leak of 4192 byte(s) in 131 object(s) allocated from:
0x4cffd2: calloc at /root/llvm/src/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:154:3
153 : ENSURE_ASAN_INITED();
154 >: GET_STACK_TRACE_MALLOC;
155 : return asan_calloc(nmemb, size, &stack);

0x549d0c: priority_queue_add at /root/workspace/comdb2/sources/util/priority_queue.c:93:30
92 :
93 >: priority_queue_item_t *i = calloc(1, sizeof(priority_queue_item_t));
94 :

0x5482b3: thdpool_enqueue at /root/workspace/comdb2/sources/util/thdpool.c:1066:28
1065 : }
1066 >: int queue_rc = priority_queue_add(&pool->queue, priority, item);
1067 :

0x56da49: __memp_sync_int at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:1431:14
1430 :
1431 >: t_ret = thdpool_enqueue(trickle_thdpool,
1432 : trickle_do_work, range, 0, NULL, 0,

0x56cb20: __memp_sync_restartable at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:401:6
400 : if ((ret =
401 >: __memp_sync_int(dbenv, NULL, 0, DB_SYNC_CACHE, NULL,
402 : restartable, (dbenv->tx_perfect_ckp ? lsnp : NULL), fixed)) != 0)

0x5a8063: __txn_checkpoint at /root/workspace/comdb2/sources/berkdb/txn/txn.c:2389:11
2388 : if (MPOOL_ON(dbenv) &&
2389 >: (ret = __memp_sync_restartable(dbenv,
2390 : (LF_ISSET(DB_FORCE) ? NULL : &ckp_lsn), 0, 0)) != 0) {

0x61812c: __db_apprec at /root/workspace/comdb2/sources/berkdb/env/env_recover.c:1510:20
1509 : }
1510 >: } else if ((ret = __txn_checkpoint(dbenv, 0, 0, DB_FORCE)) != 0)
1511 : goto err;

0x5e4b81: __dbenv_open at /root/workspace/comdb2/sources/berkdb/env/env_open.c:0:0
1 : /*-
2 : * See the file LICENSE for redistribution information.
3 : *

0x7ebd0a: dbenv_open at /root/workspace/comdb2/sources/bdb/file.c:2780:10
2779 : print(bdb_state, "opening %s\n", txndir);
2780 >: rc = dbenv->open(dbenv, txndir, flags, S_IRUSR | S_IWUSR);
2781 : if (rc != 0) {

0x7e9050: bdb_open_int at /root/workspace/comdb2/sources/bdb/file.c:5747:28
5746 : */
5747 >: bdb_state->dbenv = dbenv_open(bdb_state);
5748 : if (bdb_state->dbenv == NULL) {

0xb18654: bdb_open_env at /root/workspace/comdb2/sources/bdb/file.c:6021:12
6020 :
6021 >: return bdb_open_int(
6022 : 1, /* envonly */

0xafe5cb: open_bdb_env at /root/workspace/comdb2/sources/db/glue.c:3766:22
3765 : /* open environment */
3766 >: dbenv->bdb_env = bdb_open_env(
3767 : dbenv->envname, dbenv->basedir, dbenv->bdb_attr, dbenv->bdb_callback,

0xaef772: init at /root/workspace/comdb2/sources/db/comdb2.c:3796:9
3795 : /* open up the bdb_env now that we have set all the attributes */
3796 >: if (open_bdb_env(thedb)) {
3797 : logmsg(LOGMSG_FATAL, "failed to open bdb_env for %s\n", dbname);

0xaebb41: main at /root/workspace/comdb2/sources/db/comdb2.c:5466:9
5465 :
5466 >: if (init(argc, argv) == -1) {
5467 : logmsg(LOGMSG_FATAL, "failed to start\n");

0x27001: __libc_start_main at ??:0:0

Direct leak of 4192 byte(s) in 131 object(s) allocated from:
0x4cffd2: calloc at /root/llvm/src/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:154:3
153 : ENSURE_ASAN_INITED();
154 >: GET_STACK_TRACE_MALLOC;
155 : return asan_calloc(nmemb, size, &stack);

0x549d0c: priority_queue_add at /root/workspace/comdb2/sources/util/priority_queue.c:93:30
92 :
93 >: priority_queue_item_t *i = calloc(1, sizeof(priority_queue_item_t));
94 :

0x5482b3: thdpool_enqueue at /root/workspace/comdb2/sources/util/thdpool.c:1066:28
1065 : }
1066 >: int queue_rc = priority_queue_add(&pool->queue, priority, item);
1067 :

0x56da49: __memp_sync_int at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:1431:14
1430 :
1431 >: t_ret = thdpool_enqueue(trickle_thdpool,
1432 : trickle_do_work, range, 0, NULL, 0,

0x56cb20: __memp_sync_restartable at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:401:6
400 : if ((ret =
401 >: __memp_sync_int(dbenv, NULL, 0, DB_SYNC_CACHE, NULL,
402 : restartable, (dbenv->tx_perfect_ckp ? lsnp : NULL), fixed)) != 0)

0x5a8063: __txn_checkpoint at /root/workspace/comdb2/sources/berkdb/txn/txn.c:2389:11
2388 : if (MPOOL_ON(dbenv) &&
2389 >: (ret = __memp_sync_restartable(dbenv,
2390 : (LF_ISSET(DB_FORCE) ? NULL : &ckp_lsn), 0, 0)) != 0) {

0x5edbfd: __txn_checkpoint_pp at /root/workspace/comdb2/sources/berkdb/txn/txn.c:2213:8
2212 : __env_rep_enter(dbenv);
2213 >: ret = __txn_checkpoint(dbenv, kbytes, minutes, flags);
2214 : if (rep_check)

0x79ae13: ll_checkpoint at /root/workspace/comdb2/sources/bdb/ll.c:1539:10
1538 : /* do the real checkpoint */
1539 >: rc = bdb_state->dbenv->txn_checkpoint(bdb_state->dbenv, 0, 0,
1540 : force ? DB_FORCE : 0);

0x7ed286: checkpoint_thread at /root/workspace/comdb2/sources/bdb/threads.c:404:14
403 :
404 >: rc = ll_checkpoint(bdb_state, 0);
405 :

0x9421: start_thread at ??:0:0

Direct leak of 32 byte(s) in 1 object(s) allocated from:
0x4cffd2: calloc at /root/llvm/src/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:154:3
153 : ENSURE_ASAN_INITED();
154 >: GET_STACK_TRACE_MALLOC;
155 : return asan_calloc(nmemb, size, &stack);

0x549d0c: priority_queue_add at /root/workspace/comdb2/sources/util/priority_queue.c:93:30
92 :
93 >: priority_queue_item_t *i = calloc(1, sizeof(priority_queue_item_t));
94 :

0x5482b3: thdpool_enqueue at /root/workspace/comdb2/sources/util/thdpool.c:1066:28
1065 : }
1066 >: int queue_rc = priority_queue_add(&pool->queue, priority, item);
1067 :

0x56dc5e: __memp_sync_int at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:1474:13
1473 :
1474 >: t_ret = thdpool_enqueue(trickle_thdpool,
1475 : trickle_do_work, range, 0, NULL, 0,

0x674c67: __memp_trickle at /root/workspace/comdb2/sources/berkdb/mp/mp_trickle.c:116:8
115 : of clean pages. So here we write all modified pages to disk. */
116 >: ret = __memp_sync_int(dbenv, NULL, n,
117 : lru ? DB_SYNC_LRU : DB_SYNC_TRICKLE, nwrotep, 1, NULL, 0);

0x66a37a: __memp_trickle_pp at /root/workspace/comdb2/sources/berkdb/mp/mp_trickle.c:49:8
48 : __env_rep_enter(dbenv);
49 >: ret = __memp_trickle(dbenv, pct, nwrotep, lru);
50 : if (rep_check)

0x7ed752: memp_trickle_thread at /root/workspace/comdb2/sources/bdb/threads.c:118:14
117 : again:
118 >: rc = bdb_state->dbenv->memp_trickle(
119 : bdb_state->dbenv, bdb_state->attr->memptricklepercent, &nwrote, 1);

0x9421: start_thread at ??:0:0

Direct leak of 32 byte(s) in 1 object(s) allocated from:
0x4cffd2: calloc at /root/llvm/src/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:154:3
153 : ENSURE_ASAN_INITED();
154 >: GET_STACK_TRACE_MALLOC;
155 : return asan_calloc(nmemb, size, &stack);

0x549d0c: priority_queue_add at /root/workspace/comdb2/sources/util/priority_queue.c:93:30
92 :
93 >: priority_queue_item_t *i = calloc(1, sizeof(priority_queue_item_t));
94 :

0x5482b3: thdpool_enqueue at /root/workspace/comdb2/sources/util/thdpool.c:1066:28
1065 : }
1066 >: int queue_rc = priority_queue_add(&pool->queue, priority, item);
1067 :

0x56dc5e: __memp_sync_int at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:1474:13
1473 :
1474 >: t_ret = thdpool_enqueue(trickle_thdpool,
1475 : trickle_do_work, range, 0, NULL, 0,

0x56cb20: __memp_sync_restartable at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:401:6
400 : if ((ret =
401 >: __memp_sync_int(dbenv, NULL, 0, DB_SYNC_CACHE, NULL,
402 : restartable, (dbenv->tx_perfect_ckp ? lsnp : NULL), fixed)) != 0)

0x5a8063: __txn_checkpoint at /root/workspace/comdb2/sources/berkdb/txn/txn.c:2389:11
2388 : if (MPOOL_ON(dbenv) &&
2389 >: (ret = __memp_sync_restartable(dbenv,
2390 : (LF_ISSET(DB_FORCE) ? NULL : &ckp_lsn), 0, 0)) != 0) {

0x5edbfd: __txn_checkpoint_pp at /root/workspace/comdb2/sources/berkdb/txn/txn.c:2213:8
2212 : __env_rep_enter(dbenv);
2213 >: ret = __txn_checkpoint(dbenv, kbytes, minutes, flags);
2214 : if (rep_check)

0x79ae13: ll_checkpoint at /root/workspace/comdb2/sources/bdb/ll.c:1539:10
1538 : /* do the real checkpoint */
1539 >: rc = bdb_state->dbenv->txn_checkpoint(bdb_state->dbenv, 0, 0,
1540 : force ? DB_FORCE : 0);

0x7ed286: checkpoint_thread at /root/workspace/comdb2/sources/bdb/threads.c:404:14
403 :
404 >: rc = ll_checkpoint(bdb_state, 0);
405 :

0x9421: start_thread at ??:0:0

Direct leak of 32 byte(s) in 1 object(s) allocated from:
0x549d0c: priority_queue_add at /root/workspace/comdb2/sources/util/priority_queue.c:93:30
92 :
93 >: priority_queue_item_t *i = calloc(1, sizeof(priority_queue_item_t));
94 :

0x56dc5e: __memp_sync_int at /root/workspace/comdb2/sources/berkdb/mp/mp_sync.c:1474:13
1473 :
1474 >: t_ret = thdpool_enqueue(trickle_thdpool,
1475 : trickle_do_work, range, 0, NULL, 0,

0x5a8063: __txn_checkpoint at /root/workspace/comdb2/sources/berkdb/txn/txn.c:2389:11
2388 : if (MPOOL_ON(dbenv) &&
2389 >: (ret = __memp_sync_restartable(dbenv,
2390 : (LF_ISSET(DB_FORCE) ? NULL : &ckp_lsn), 0, 0)) != 0) {

0x61812c: __db_apprec at /root/workspace/comdb2/sources/berkdb/env/env_recover.c:1510:20
1509 : }
1510 >: } else if ((ret = __txn_checkpoint(dbenv, 0, 0, DB_FORCE)) != 0)
1511 : goto err;

0x5e4b81: __dbenv_open at /root/workspace/comdb2/sources/berkdb/env/env_open.c:0:0
1 : /*-
2 : * See the file LICENSE for redistribution information.
3 : *

0x7ebd0a: dbenv_open at /root/workspace/comdb2/sources/bdb/file.c:2780:10
2779 : print(bdb_state, "opening %s\n", txndir);
2780 >: rc = dbenv->open(dbenv, txndir, flags, S_IRUSR | S_IWUSR);
2781 : if (rc != 0) {

0x7e9050: bdb_open_int at /root/workspace/comdb2/sources/bdb/file.c:5747:28
5746 : */
5747 >: bdb_state->dbenv = dbenv_open(bdb_state);
5748 : if (bdb_state->dbenv == NULL) {

0xb18654: bdb_open_env at /root/workspace/comdb2/sources/bdb/file.c:6021:12
6020 :
6021 >: return bdb_open_int(
6022 : 1, /* envonly */

0xafe5cb: open_bdb_env at /root/workspace/comdb2/sources/db/glue.c:3766:22
3765 : /* open environment */
3766 >: dbenv->bdb_env = bdb_open_env(
3767 : dbenv->envname, dbenv->basedir, dbenv->bdb_attr, dbenv->bdb_callback,

0xaef772: init at /root/workspace/comdb2/sources/db/comdb2.c:3796:9
3795 : /* open up the bdb_env now that we have set all the attributes */
3796 >: if (open_bdb_env(thedb)) {
3797 : logmsg(LOGMSG_FATAL, "failed to open bdb_env for %s\n", dbname);

0xaebb41: main at /root/workspace/comdb2/sources/db/comdb2.c:5466:9
5465 :
5466 >: if (init(argc, argv) == -1) {
5467 : logmsg(LOGMSG_FATAL, "failed to start\n");

0x27001: __libc_start_main at ??:0:0
```