do_wait: do take security_task_wait() into account
I was never able to understand what should we actually do when
security_task_wait() fails, but the current code doesn't look right.
If ->task_wait() returns the error, we update *notask_error correctly.
But then we either reap the child (despite the fact this was forbidden)
or clear *notask_error (and hide the securiy policy problems).
This patch assumes that "stolen by ptrace" doesn't matter. If selinux
denies the child we should ignore it but make sure we report -EACCESS
instead of -ECHLD if there are no other eligible children.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/kernel/exit.c b/kernel/exit.c
index 167e1e3..d2e8239 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1582,6 +1582,7 @@
*/
if (*notask_error)
*notask_error = ret;
+ return 0;
}
if (likely(!ptrace) && unlikely(p->ptrace)) {