1 files changed, 4 insertions, 5 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index c326d6dceee3..7de9c984f696 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1054,12 +1054,11 @@ asmlinkage long sys_setsid(void)
         if (group_leader->signal->leader)
                 goto out;
 
-        /* Fail if a process group id already exists that equals the proposed
-         * session id.
+        /* Fail if a process group id already exists that equals the
+         * proposed session id.
          *
-         * Don't check if session == 1 because kernel threads and CLONE_NEWPID
-         * tasks use this session id and so the check will always fail and make
-         * it so init cannot successfully call setsid.
+         * Don't check if session == 1, clone(CLONE_NEWPID) creates
+         * this group/session beforehand.
          */
         if (session != 1 && pid_task(sid, PIDTYPE_PGID))
                 goto out;