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-rw-r--r--fs/exec.c22
1 files changed, 10 insertions, 12 deletions
diff --git a/fs/exec.c b/fs/exec.c
index d0ecea0781f7..dd194923c52c 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -616,6 +616,15 @@ static int de_thread(struct task_struct *tsk)
616 kmem_cache_free(sighand_cachep, newsighand); 616 kmem_cache_free(sighand_cachep, newsighand);
617 return -EAGAIN; 617 return -EAGAIN;
618 } 618 }
619
620 /*
621 * child_reaper ignores SIGKILL, change it now.
622 * Reparenting needs write_lock on tasklist_lock,
623 * so it is safe to do it under read_lock.
624 */
625 if (unlikely(current->group_leader == child_reaper))
626 child_reaper = current;
627
619 zap_other_threads(current); 628 zap_other_threads(current);
620 read_unlock(&tasklist_lock); 629 read_unlock(&tasklist_lock);
621 630
@@ -660,23 +669,12 @@ static int de_thread(struct task_struct *tsk)
660 struct dentry *proc_dentry1, *proc_dentry2; 669 struct dentry *proc_dentry1, *proc_dentry2;
661 unsigned long ptrace; 670 unsigned long ptrace;
662 671
663 leader = current->group_leader;
664 /*
665 * If our leader is the child_reaper become
666 * the child_reaper and resend SIGKILL signal.
667 */
668 if (unlikely(leader == child_reaper)) {
669 write_lock(&tasklist_lock);
670 child_reaper = current;
671 zap_other_threads(current);
672 write_unlock(&tasklist_lock);
673 }
674
675 /* 672 /*
676 * Wait for the thread group leader to be a zombie. 673 * Wait for the thread group leader to be a zombie.
677 * It should already be zombie at this point, most 674 * It should already be zombie at this point, most
678 * of the time. 675 * of the time.
679 */ 676 */
677 leader = current->group_leader;
680 while (leader->exit_state != EXIT_ZOMBIE) 678 while (leader->exit_state != EXIT_ZOMBIE)
681 yield(); 679 yield();
682 680