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Message-ID: <20200527152559.GB4153131@cisco>
Date: Wed, 27 May 2020 09:25:59 -0600
From: Tycho Andersen <tycho@...ho.ws>
To: Christian Brauner <christian.brauner@...ntu.com>
Cc: linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org>,
Andy Lutomirski <luto@...nel.org>,
Matt Denton <mpdenton@...gle.com>,
Sargun Dhillon <sargun@...gun.me>,
Jann Horn <jannh@...gle.com>, Chris Palmer <palmer@...gle.com>,
Aleksa Sarai <cyphar@...har.com>,
Robert Sesek <rsesek@...gle.com>,
Jeffrey Vander Stoep <jeffv@...gle.com>,
Linux Containers <containers@...ts.linux-foundation.org>
Subject: Re: [PATCH 1/2] seccomp: notify user trap about unused filter
On Wed, May 27, 2020 at 01:19:01PM +0200, Christian Brauner wrote:
> +void seccomp_filter_notify(const struct task_struct *tsk)
> +{
> + struct seccomp_filter *orig = tsk->seccomp.filter;
> +
> + while (orig && refcount_dec_and_test(&orig->live)) {
> + if (waitqueue_active(&orig->wqh))
> + wake_up_poll(&orig->wqh, EPOLLHUP);
> + orig = orig->prev;
> + }
> +}
Is there a reason this can't live in put_seccomp_filter()?
Tycho
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