fix(nimble): fix memory leak issue in Blufi example

components/bt/common/btc/profile/esp/blufi/include/esp_blufi.h

@@ -44,6 +44,7 @@ void esp_blufi_gatt_svr_register_cb(struct ble_gatt_register_ctxt *ctxt, void *a
 
 /* Initialise gatt server */
 int esp_blufi_gatt_svr_init(void);
+int esp_blufi_gatt_svr_deinit(void);
 void esp_blufi_btc_init(void);
 void esp_blufi_btc_deinit(void);
 #endif

components/bt/common/btc/profile/esp/blufi/nimble_host/esp_blufi.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -240,6 +240,32 @@ static void init_gatt_values(void)
 
 }
 
+static void deinit_gatt_values(void)
+{
+    int i = 0;
+    const struct ble_gatt_svc_def *svc;
+    const struct ble_gatt_chr_def *chr;
+    const struct ble_gatt_dsc_def *dsc;
+
+    for (svc = gatt_svr_svcs; svc && svc->uuid; svc++) {
+        for (chr = svc->characteristics; chr && chr->uuid; chr++) {
+            if (i < SERVER_MAX_VALUES && gatt_values[i].buf != NULL) {
+                os_mbuf_free(gatt_values[i].buf);  /* Free the buffer */
+                gatt_values[i].buf = NULL;         /* Nullify the pointer to avoid dangling references */
+            }
+            ++i;
+
+            for (dsc = chr->descriptors; dsc && dsc->uuid; dsc++) {
+                if (i < SERVER_MAX_VALUES && gatt_values[i].buf != NULL) {
+                    os_mbuf_free(gatt_values[i].buf);  /* Free the buffer */
+                    gatt_values[i].buf = NULL;         /* Nullify the pointer to avoid dangling references */
+                }
+                ++i;
+            }
+        }
+    }
+}
+
 int esp_blufi_gatt_svr_init(void)
 {
     int rc;
@@ -260,6 +286,18 @@ int esp_blufi_gatt_svr_init(void)
     return 0;
 }
 
+int esp_blufi_gatt_svr_deinit(void)
+{
+    deinit_gatt_values();
+
+    ble_gatts_free_svcs();
+    /* Deinitialize BLE GATT and GAP services */
+    ble_svc_gatt_deinit();
+    ble_svc_gap_deinit();
+
+    return 0;
+}
+
 static int
 esp_blufi_gap_event(struct ble_gap_event *event, void *arg)
 {

examples/bluetooth/blufi/main/blufi_init.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Unlicense OR CC0-1.0
  */
@@ -227,8 +227,11 @@ esp_err_t esp_blufi_host_deinit(void)
 {
     esp_err_t ret = ESP_OK;
 
+    esp_blufi_gatt_svr_deinit();
     ret = nimble_port_stop();
-
+    if (ret != ESP_OK) {
+        return ret;
+    }
     if (ret == 0) {
         esp_nimble_deinit();
     }