From ff09587d2381da4d02fd8a31a73e6271f3ca3e9f Mon Sep 17 00:00:00 2001
From: David Lin <linpeng1577@gmail.com>
Date: Sun, 12 Apr 2020 11:58:33 +0800
Subject: [PATCH] [components/drivers] update pipe.c

Fixed stackover flow bug when create pipe->fifo
---
 components/drivers/src/pipe.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/components/drivers/src/pipe.c b/components/drivers/src/pipe.c
index ae87b6f5f2..393370fc9a 100644
--- a/components/drivers/src/pipe.c
+++ b/components/drivers/src/pipe.c
@@ -330,6 +330,11 @@ rt_err_t  rt_pipe_open (rt_device_t device, rt_uint16_t oflag)
     if (pipe->fifo == RT_NULL)
     {
         pipe->fifo = rt_ringbuffer_create(pipe->bufsz);
+        if (pipe->fifo == RT_NULL)
+        {
+            rt_mutex_release(&(pipe->lock));
+            return -RT_ENOMEM;
+        }
     }
 
     rt_mutex_release(&(pipe->lock));