From 65d3c54c1999624308bce3c2408a8278403ada0a Mon Sep 17 00:00:00 2001
From: xiongweichao <xiongweichao@espressif.com>
Date: Tue, 18 Oct 2022 14:21:39 +0800
Subject: [PATCH] bt: Fixed esp_spp_write() crash when len is 0

Closes https://github.com/espressif/esp-idf/issues/9977
---
 components/bt/host/bluedroid/api/esp_spp_api.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/components/bt/host/bluedroid/api/esp_spp_api.c b/components/bt/host/bluedroid/api/esp_spp_api.c
index 040fe4a469..0c8553d481 100644
--- a/components/bt/host/bluedroid/api/esp_spp_api.c
+++ b/components/bt/host/bluedroid/api/esp_spp_api.c
@@ -195,6 +195,11 @@ esp_err_t esp_spp_write(uint32_t handle, int len, uint8_t *p_data)
     btc_spp_args_t arg;
     ESP_BLUEDROID_STATUS_CHECK(ESP_BLUEDROID_STATUS_ENABLED);
 
+    if (len <= 0 || p_data == NULL) {
+        LOG_ERROR("Invalid data or len!\n");
+        return ESP_ERR_INVALID_ARG;
+    }
+
     msg.sig = BTC_SIG_API_CALL;
     msg.pid = BTC_PID_SPP;
     msg.act = BTC_SPP_ACT_WRITE;