[MESH SDK] Assertion Failed after trying to provision a reset node

Question

Hi,

I'm using the provisioning example from the mesh sdk and I have an "ASSERTION FAILED at :0" error when I'm trying to re provision a node that I have provision before and reset.

To reproduce :

- Provision a node using the example.

- Reset the node using the "config_client_node_reset" function from config client. (The node is successfully unprovisioned and I receive the unprovision beacon)

- Try to provision again the same noed => Assertion Failed

Edit :

- After few tests, the problem also appends when I'm trying to provision an other node ather calling "config_client_node_reset"

After putting logs, its seem to be the "list_compare_add" function (in list.c) that cause this error. I got the first log but not the second.

#include "nrf_log.h"
uint32_t list_compare_add(list_node_t ** pp_head, list_node_t * p_new, list_cmp_cb_t cmp_cb)
{ 
    NRF_LOG_INFO("------- T1");
    NRF_MESH_ASSERT(pp_head != NULL && p_new != NULL && cmp_cb != NULL);
    NRF_MESH_ASSERT(*pp_head != p_new);
    NRF_LOG_INFO("------- T2");

    if (*pp_head == NULL)
    {
        *pp_head           = p_new;
        (*pp_head)->p_next = NULL;    /* sanitize */
        return NRF_SUCCESS;
    }
    else
    {

        list_node_t * p_node = (*pp_head);
        list_node_t * p_prev = NULL;
        while (p_node != NULL &&
               !cmp_cb(p_node, p_new))
        {
            p_prev = p_node;
            p_node = p_node->p_next;
            NRF_MESH_ASSERT(p_node != p_new);
        }

        /* This is the last element in the list. */
        if (p_node == NULL)
        {
            list_insert(p_prev, p_new);
            return NRF_SUCCESS;
        }
        else
        {
            return NRF_ERROR_FORBIDDEN;
        }
    }

}

<info> app: Config client event
<info> app: Acknoledge for device reset

<info> app: Provisioning ask
<info> app: Stop Scanning For Unprovisioned Devices

<info> app: ------- T1
<error> app: ASSERTION FAILED at :0

This method is called from "nrf_mesh_prov_bearer_add" in nrf_mesh_prov.c which is called from "prov_helper_provisioner_init" in provisioner_helper.c

uint32_t nrf_mesh_prov_bearer_add(nrf_mesh_prov_ctx_t * p_ctx, prov_bearer_t * p_prov_bearer)
{
    if (p_ctx == NULL || p_prov_bearer == NULL)
    {
        return NRF_ERROR_NULL;
    }

    uint32_t status = list_compare_add(&p_ctx->p_bearers, &p_prov_bearer->node, bearer_compare_callback);
    if (status == NRF_SUCCESS)
    {
        p_prov_bearer->p_parent = p_ctx;
        p_ctx->supported_bearers |= p_prov_bearer->bearer_type;
    }
    return status;
}

static uint8_t prov_helper_provisioner_init(void)
{
    if (!m_provisioner_init_done)
    {
        nrf_mesh_prov_oob_caps_t capabilities = NRF_MESH_PROV_OOB_CAPS_DEFAULT(ACCESS_ELEMENT_COUNT);
        
        if (nrf_mesh_prov_init(&m_prov_ctx, m_public_key, m_private_key, &capabilities, prov_evt_handler) != NRF_SUCCESS)
        {
          return SERIAL_ERROR;
        }
        else if(nrf_mesh_prov_bearer_add(&m_prov_ctx, nrf_mesh_prov_bearer_adv_interface_get(&m_prov_bearer_adv)) != NRF_SUCCESS)
        {
          return SERIAL_ERROR;
        }
        return SERIAL_CMD_SUCCESS;
    }

    m_provisioner_init_done = true;
}

Used sdk :

- nRF5_SDK_16.0.0_98a08e2

- nrf5_SDK_for_Mesh_v4.2.0_src

Board used :

- nrf52840 evaluation board

Regards

neicureuil · Accepted Answer

Problem solved : 
 I have forgot to set the "m_provisioner_init_done" variable in the "prov_helper_provisioner_init" 
 static uint8_t prov_helper_provisioner_init(void)
{
 if (!m_provisioner_init_done)
 {
 nrf_mesh_prov_oob_caps_t capabilities = NRF_MESH_PROV_OOB_CAPS_DEFAULT(ACCESS_ELEMENT_COUNT);
 
 if (nrf_mesh_prov_init(&m_prov_ctx, m_public_key, m_private_key, &capabilities, prov_evt_handler) != NRF_SUCCESS)
 {
 m_provisioner_init_done = true;
 return SERIAL_ERROR;
 }
 else if(nrf_mesh_prov_bearer_add(&m_prov_ctx, nrf_mesh_prov_bearer_adv_interface_get(&m_prov_bearer_adv)) != NRF_SUCCESS)
 {
 m_provisioner_init_done = true;
 return SERIAL_ERROR;
 }
 m_provisioner_init_done = true;
 return SERIAL_CMD_SUCCESS;
 }
}

[MESH SDK] Assertion Failed after trying to provision a reset node

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