From f64dec9f5234a77cc67b5ea7a355be86b3f80466 Mon Sep 17 00:00:00 2001
From: "Dmitriy A. Gerasimov" <dmitriy.gerasimov@demlabs.net>
Date: Mon, 28 Sep 2020 14:58:15 +0700
Subject: [PATCH] [+] Added sizes checks
---
modules/type/dag/dap_chain_cs_dag.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/modules/type/dag/dap_chain_cs_dag.c b/modules/type/dag/dap_chain_cs_dag.c
index cabeb2ae2b..d4b55672c4 100644
--- a/modules/type/dag/dap_chain_cs_dag.c
+++ b/modules/type/dag/dap_chain_cs_dag.c
@@ -888,11 +888,15 @@ static dap_chain_datum_t* s_chain_callback_atom_get_datum(dap_chain_atom_ptr_t a
*/
static dap_chain_atom_ptr_t s_chain_callback_atom_iter_get_first(dap_chain_atom_iter_t * a_atom_iter, size_t * a_ret_size )
{
+ if(! a_atom_iter){
+ log_it(L_ERROR, "NULL iterator on input for atom_iter_get_first function");
+ return NULL;
+ }
dap_chain_cs_dag_t * l_dag = DAP_CHAIN_CS_DAG(a_atom_iter->chain);
dap_chain_cs_dag_pvt_t *l_dag_pvt = l_dag ? PVT(l_dag) : NULL;
a_atom_iter->cur_item = l_dag_pvt->events;
a_atom_iter->cur = (dap_chain_cs_dag_event_t*) (l_dag_pvt->events ? l_dag_pvt->events->event : NULL);
- a_atom_iter->cur_size =l_dag_pvt->events->event_size;
+ a_atom_iter->cur_size = l_dag_pvt->events ? l_dag_pvt->events->event_size : 0;
// a_atom_iter->cur = a_atom_iter->cur ?
// (dap_chain_cs_dag_event_t*) PVT (DAP_CHAIN_CS_DAG( a_atom_iter->chain) )->events->event : NULL;
--
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