It is not possible to find a sub-thread in ->children/->ptrace_children
lists, ptrace_attach() does not allow to attach to sub-threads.
Even if it was possible to ptrace the task from the same thread group,
we can't allow to release ->group_leader while there are others (ptracer)
threads in the same group.
Signed-off-by: Oleg Nesterov <[email protected]>
--- 2.6.18-rc4/kernel/exit.c~ 2006-09-02 21:08:59.000000000 +0400
+++ 2.6.18-rc4/kernel/exit.c 2006-09-02 21:09:12.000000000 +0400
@@ -1051,7 +1051,7 @@ static int eligible_child(pid_t pid, int
* Do not consider thread group leaders that are
* in a non-empty thread group:
*/
- if (current->tgid != p->tgid && delay_group_leader(p))
+ if (delay_group_leader(p))
return 2;
if (security_task_wait(p))
--
VGER BF report: U 0.499788
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