F407 Hard Fault

Hello,

I am woking with CMSIS RTOS v1 on STM32F407 mcu,

and every time after ~30 mins my device gets haurd fault.

void vListInsertEnd( List_t * const pxList, ListItem_t * const pxNewListItem )
{
ListItem_t * const pxIndex = pxList->pxIndex; // <------- PC 0x08006f4c
 
	/* Only effective when configASSERT() is also defined, these tests may catch
	the list data structures being overwritten in memory. They will not catch
	data errors caused by incorrect configuration or use of FreeRTOS. */
	listTEST_LIST_INTEGRITY( pxList );
	listTEST_LIST_ITEM_INTEGRITY( pxNewListItem );
 
	/* Insert a new list item into pxList, but rather than sort the list,
	makes the new list item the last item to be removed by a call to
	listGET_OWNER_OF_NEXT_ENTRY(). */
	pxNewListItem->pxNext = pxIndex;
	pxNewListItem->pxPrevious = pxIndex->pxPrevious;
 
	/* Only used during decision coverage testing. */
	mtCOVERAGE_TEST_DELAY();
 
	pxIndex->pxPrevious->pxNext = pxNewListItem;
	pxIndex->pxPrevious = pxNewListItem;
 
	/* Remember which list the item is in. */
	pxNewListItem->pvContainer = ( void * ) pxList;
 
	( pxList->uxNumberOfItems )++;
}

What is the reason of the problem?

Thank you,

Anton