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ptrace: mm_need_new_owner: use ->real_parent to search in the siblings 

"Search in the siblings" should use ->real_parent, not ->parent.  If the
task is traced then ->parent == tracer, while the task's parent is always
->real_parent.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2009-06-17 16:27:29 -07:00 committed by Linus Torvalds
parent 48597760fa
commit dea33cfd99
1 changed files with 1 additions and 1 deletions
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2
kernel/exit.c
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@ -590,7 +590,7 @@ void mm_update_next_owner(struct mm_struct *mm)
/*
* Search in the siblings
*/
list_for_each_entry(c, &p->parent->children, sibling) {
list_for_each_entry(c, &p->real_parent->children, sibling) {
if (c->mm == mm)
goto assign_new_owner;
}