1 files changed, 11 insertions, 3 deletions

diff --git a/fs/exec.c b/fs/exec.c
index dd194923c52c..db0769447d33 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -708,7 +708,17 @@ static int de_thread(struct task_struct *tsk)
                 remove_parent(current);
                 remove_parent(leader);
 
-                switch_exec_pids(leader, current);
+
+                /* Become a process group leader with the old leader's pid.
+                 * Note: The old leader also uses thispid until release_task
+                 *       is called.  Odd but simple and correct.
+                 */
+                detach_pid(current, PIDTYPE_PID);
+                current->pid = leader->pid;
+                attach_pid(current, PIDTYPE_PID,  current->pid);
+                attach_pid(current, PIDTYPE_PGID, current->signal->pgrp);
+                attach_pid(current, PIDTYPE_SID,  current->signal->session);
+                list_add_tail(&current->tasks, &init_task.tasks);
 
                 current->parent = current->real_parent = leader->real_parent;
                 leader->parent = leader->real_parent = child_reaper;
@@ -722,8 +732,6 @@ static int de_thread(struct task_struct *tsk)
                         __ptrace_link(current, parent);
                 }
 
-                list_del(&current->tasks);
-                list_add_tail(&current->tasks, &init_task.tasks);
                 current->exit_signal = SIGCHLD;
 
                 BUG_ON(leader->exit_state != EXIT_ZOMBIE);