On Tue, Nov 24, 2020 at 5:42 AM Oleg Nesterov [off-list ref] wrote:

On 11/23, Suren Baghdasaryan wrote:

quoted

+     if (madvise_destructive(behavior)) {
+             /* Allow destructive madvise only on a dying processes */
+             if (!signal_group_exit(task->signal)) {

signal_group_exit(task) is true if this task execs and kills other threads,
see the comment above this helper.

I think you need !(task->signal->flags & SIGNAL_GROUP_EXIT).

I see. Thanks for the feedback, Oleg. I'll test and fix it in the next version.

Oleg.