bugfix: share kernel thread group should not dup files from caller group

after this commits
  commit e7fa4ca
  Author: Yanfeng Liu <[email protected]>
  Date: Fri May 17 06:11:52 2024 +0800

  sched/tcb: use shared group for kthreads

all kernel thread share group idle
and should not dup filelist to this group

Signed-off-by: guohao15 <[email protected]>
Signed-off-by: dongjiuzhu1 <[email protected]>

Author: guohao15

sched/group/group_setuptaskfiles.c

@@ -79,15 +79,19 @@ int group_setuptaskfiles(FAR struct task_tcb_s *tcb,
 #ifndef CONFIG_FDCLONE_DISABLE
   DEBUGASSERT(rtcb->group);
 
-  /* Duplicate the parent task's file descriptors */
+  /* With the exception of kernel threads, duplicate the parent task's
+   * file descriptors.
+   */
 
-  if (group != rtcb->group)
+  if (group != rtcb->group &&
+      (tcb->cmn.flags & TCB_FLAG_TTYPE_MASK) != TCB_FLAG_TTYPE_KERNEL)
     {
       ret = fdlist_copy(&rtcb->group->tg_fdlist,
                         &group->tg_fdlist, actions, cloexec);
     }
 
-  if (ret >= 0 && actions != NULL)
+  if (ret >= 0 && actions != NULL &&
+      (tcb->cmn.flags & TCB_FLAG_TTYPE_MASK) != TCB_FLAG_TTYPE_KERNEL)
     {
       ret = spawn_file_actions(&tcb->cmn, actions);
     }