From cda2979b63fad37a33706f8aa430664a9c4d0b3b Mon Sep 17 00:00:00 2001 From: Dean Deng Date: Wed, 1 Jul 2020 08:40:31 -0700 Subject: Complete async signal delivery support in vfs2. - Support FIOASYNC, FIO{SET,GET}OWN, SIOC{G,S}PGRP (refactor getting/setting owner in the process). - Unset signal recipient when setting owner with pid == 0 and valid owner type. Updates #2923. PiperOrigin-RevId: 319231420 --- pkg/sentry/kernel/fasync/fasync.go | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'pkg/sentry/kernel/fasync/fasync.go') diff --git a/pkg/sentry/kernel/fasync/fasync.go b/pkg/sentry/kernel/fasync/fasync.go index 323f1dfa5..153d2cd9b 100644 --- a/pkg/sentry/kernel/fasync/fasync.go +++ b/pkg/sentry/kernel/fasync/fasync.go @@ -176,3 +176,13 @@ func (a *FileAsync) SetOwnerProcessGroup(requester *kernel.Task, recipient *kern a.recipientTG = nil a.recipientPG = recipient } + +// ClearOwner unsets the current signal recipient. +func (a *FileAsync) ClearOwner() { + a.mu.Lock() + defer a.mu.Unlock() + a.requester = nil + a.recipientT = nil + a.recipientTG = nil + a.recipientPG = nil +} -- cgit v1.2.3