Don't flush inherited SIGKILL during execve() in SELinux's post cred commit
hook.  This isn't really a security problem: if the SIGKILL came before the
credentials were changed, then we were right to receive it at the time, and
should honour it; if it came after the creds were changed, then we definitely
should honour it; and in any case, all that will happen is that the process
will be scrapped before it ever returns to userspace.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NOleg Nesterov <oleg@redhat.com>
Signed-off-by: NJames Morris <jmorris@namei.org>