Re: [RFC PATCH 2/3] exec: don't wait for zombie threads with cred_guard_mutex held

On Sun, Nov 09, 2025 at 06:15:33PM +0100, Oleg Nesterov wrote: ..

static int kill_sub_threads(struct task_struct *tsk) { struct signal_struct *sig = tsk->signal; int err = -EINTR;

read_lock(&tasklist_lock); spin_lock_irq(&tsk->sighand->siglock); if (!((sig->flags & SIGNAL_GROUP_EXIT) || sig->group_exec_task)) { sig->group_exec_task = tsk; sig->notify_count = -zap_other_threads(tsk);

Hi Oleg! I somehow manage to miss a moment -- why negative result here?

err = 0;

} spin_unlock_irq(&tsk->sighand->siglock); read_unlock(&tasklist_lock);

return err; }

p.s. i've dropped long CC but left ML intact)

Cyrill