linux-kernel - Re: [RFC PATCH 6/6] selftests: Test RLIMIT_NPROC in clone-created user namespaces

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Message-ID: <20220215093455.GB21589@blackbody.suse.cz>
Date:   Tue, 15 Feb 2022 10:34:55 +0100
From:   Michal Koutný <mkoutny@...e.com>
To:     Shuah Khan <skhan@...uxfoundation.org>
Cc:     Eric Biederman <ebiederm@...ssion.com>,
        Alexey Gladkov <legion@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Shuah Khan <shuah@...nel.org>,
        Christian Brauner <brauner@...nel.org>,
        Solar Designer <solar@...nwall.com>,
        Ran Xiaokai <ran.xiaokai@....com.cn>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        Linux Containers <containers@...ts.linux-foundation.org>
Subject: Re: [RFC PATCH 6/6] selftests: Test RLIMIT_NPROC in clone-created
 user namespaces

On Wed, Feb 09, 2022 at 06:25:34PM -0700, Shuah Khan <skhan@...uxfoundation.org> wrote:
> Does this test run in non-privileged user mode? If it doesn't
> let add a check and skip the test.

It requires user namespaces created by the privileged user (to bypass
RLIMIT_NPROC on the top level).

I'll add the check into code.

Michal