note: add ringbuffer aligned access handle

Fix ubsan warning that writes need to be aligned to memory boundaries when writing data

Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>

drivers/note/note_driver.c

@@ -585,10 +585,10 @@ static void note_record_taskname(pid_t pid, FAR const char *name)
 
   ti = (FAR struct note_taskname_info_s *)
         &g_note_taskname.buffer[g_note_taskname.head];
-  ti->size = tilen;
+  ti->size = NOTE_ALIGN(tilen);
   ti->pid = pid;
   strlcpy(ti->name, name, namelen + 1);
-  g_note_taskname.head += tilen;
+  g_note_taskname.head += ti->size;
 }
 #endif
 

drivers/note/noteram_driver.c

@@ -295,7 +295,7 @@ static void noteram_remove(FAR struct noteram_driver_s *drv)
 
   /* Get the length of the note at the tail index */
 
-  length = drv->ni_buffer[tail];
+  length = NOTE_ALIGN(drv->ni_buffer[tail]);
   DEBUGASSERT(length <= noteram_length(drv));
 
   /* Increment the tail index to remove the entire note from the circular
@@ -387,7 +387,7 @@ static ssize_t noteram_get(FAR struct noteram_driver_s *drv,
       remaining--;
     }
 
-  drv->ni_read = read;
+  drv->ni_read = NOTE_ALIGN(read);
 
   return notelen;
 }
@@ -594,7 +594,7 @@ static void noteram_add(FAR struct note_driver_s *driver,
   space = space < notelen ? space : notelen;
   memcpy(drv->ni_buffer + head, note, space);
   memcpy(drv->ni_buffer, buf + space, notelen - space);
-  drv->ni_head = noteram_next(drv, head, notelen);
+  drv->ni_head = noteram_next(drv, head, NOTE_ALIGN(notelen));
   spin_unlock_irqrestore_wo_note(&drv->lock, flags);
 }
 

include/nuttx/sched_note.h

@@ -51,6 +51,9 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#define NOTE_ALIGN(a) (((a) + sizeof(uintptr_t) - 1) & \
+                       ~(sizeof(uintptr_t) - 1))
+
 /* Provide defaults for some configuration settings (could be undefined with
  * old configuration files)
  */