修复低概率终端无法输入问题 (#6464)

* [ulog] Fix the problem that the terminal cannot input

* [mem] Fix NULL pointer access

1 files changed, 5 insertions, 6 deletions

diff --git a/src/mem.c b/src/mem.c
index 14593bcfd7..221a5553e6 100644
--- a/src/mem.c
+++ b/src/mem.c
@@ -525,12 +525,6 @@ void rt_smem_free(void *rmem)
 
     /* Get the corresponding struct rt_small_mem_item ... */
     mem = (struct rt_small_mem_item *)((rt_uint8_t *)rmem - SIZEOF_STRUCT_MEM);
-
-    RT_DEBUG_LOG(RT_DEBUG_MEM,
-                 ("release memory 0x%x, size: %d\n",
-                  (rt_ubase_t)rmem,
-                  (rt_ubase_t)(mem->next - ((rt_uint8_t *)mem - small_mem->heap_ptr))));
-
     /* ... which has to be in a used state ... */
     small_mem = MEM_POOL(mem);
     RT_ASSERT(small_mem != RT_NULL);
@@ -541,6 +535,11 @@ void rt_smem_free(void *rmem)
               (rt_uint8_t *)rmem < (rt_uint8_t *)small_mem->heap_end);
     RT_ASSERT(MEM_POOL(&small_mem->heap_ptr[mem->next]) == small_mem);
 
+    RT_DEBUG_LOG(RT_DEBUG_MEM,
+                 ("release memory 0x%x, size: %d\n",
+                  (rt_ubase_t)rmem,
+                  (rt_ubase_t)(mem->next - ((rt_uint8_t *)mem - small_mem->heap_ptr))));
+
     /* ... and is now unused. */
     mem->pool_ptr = MEM_FREED();
 #ifdef RT_USING_MEMTRACE