From 15a8ebe0a09a1ca509dbf6d2a3bafae4a01f650f Mon Sep 17 00:00:00 2001
From: wdfk-prog <1425075683@qq.com>
Date: Tue, 9 Jul 2024 20:22:37 +0800
Subject: [PATCH] [components][driver][can]Fix possible memory overflow caused
 by RX
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修复RX可能导致的内存溢出情况

#8634
---
 components/drivers/can/can.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/components/drivers/can/can.c b/components/drivers/can/can.c
index 2ebab4afbc..f10e05dc55 100644
--- a/components/drivers/can/can.c
+++ b/components/drivers/can/can.c
@@ -43,9 +43,9 @@ static rt_err_t rt_can_init(struct rt_device *dev)
 /*
  * can interrupt routines
  */
-rt_inline int _can_int_rx(struct rt_can_device *can, struct rt_can_msg *data, int msgs)
+rt_inline rt_ssize_t _can_int_rx(struct rt_can_device *can, struct rt_can_msg *data, rt_ssize_t msgs)
 {
-    int size;
+    rt_ssize_t size;
     struct rt_can_rx_fifo *rx_fifo;
     RT_ASSERT(can != RT_NULL);
     size = msgs;
@@ -54,7 +54,7 @@ rt_inline int _can_int_rx(struct rt_can_device *can, struct rt_can_msg *data, in
     RT_ASSERT(rx_fifo != RT_NULL);
 
     /* read from software FIFO */
-    while (msgs)
+    while (msgs / sizeof(struct rt_can_msg) > 0)
     {
         rt_base_t level;
 #ifdef RT_CAN_USING_HDR