diff --git a/src/kv_db.cpp b/src/kv_db.cpp
index 42b89a2b..e57fca60 100644
--- a/src/kv_db.cpp
+++ b/src/kv_db.cpp
@@ -896,7 +896,9 @@ static void get_block(kv_db_t *db, uint64_t offset, int cur_level, int recheck_p
         if (op->retval != op->len)
         {
             // error
+            free(op->iov.buf[0].iov_base);
             cb(op->retval >= 0 ? -EIO : op->retval, BLK_NOCHANGE);
+            delete op;
             return;
         }
         invalidate(db, op->offset, op->version);
@@ -909,6 +911,8 @@ static void get_block(kv_db_t *db, uint64_t offset, int cur_level, int recheck_p
             if (blk->updating > 0 && recheck_policy == KV_RECHECK_WAIT)
             {
                 // Wait until block update stops
+                free(op->iov.buf[0].iov_base);
+                delete op;
                 db->continue_update.emplace(blk->offset, [=, blk_offset = blk->offset]()
                 {
                     get_block(db, offset, cur_level, recheck_policy, cb);