ITS#10342 lmdb: fix potential memleak in child txn_begin

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index fcc66aae5250ffe606adbcb95510f6527cbbf878..9fb142d23d51ef1e279da2f300b42d1cd384142f 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -2974,8 +2974,10 @@ renew:
                rc = mdb_txn_renew0(txn);
        }
        if (rc) {
-               if (txn != env->me_txn0)
+               if (txn != env->me_txn0) {
+                       free(txn->mt_u.dirty_list);
                        free(txn);
+               }
        } else {
                txn->mt_flags |= flags; /* could not change txn=me_txn0 earlier */
                *ret = txn;