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Date: Thu, 17 May 2018 17:46:37 +0200
From: Oleg Nesterov <oleg@redhat.com>
To: Tycho Andersen <tycho@tycho.ws>
Cc: linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org,
        Kees Cook <keescook@chromium.org>,
        Andy Lutomirski <luto@amacapital.net>,
        "Eric W . Biederman" <ebiederm@xmission.com>,
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        Christian Brauner <christian.brauner@ubuntu.com>,
        Tyler Hicks <tyhicks@canonical.com>,
        Akihiro Suda <suda.akihiro@lab.ntt.co.jp>,
        "Tobin C . Harding" <me@tobin.cc>
Subject: Re: [PATCH v2 1/4] seccomp: add a return code to trap to userspace
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On 05/17, Tycho Andersen wrote:
>
> > From lockdep pov this loop tries to take the same lock twice or more, it shoul
> > complain.
>
> I didn't, but I guess that's because it's not trying to take the same lock
> twice -- the pointer cur is changing in the loop.

Yes, I see. But this is the same lock for lockdep, it has the same class.

Oleg.