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From: KP Singh <kpsingh@chromium.org>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: open list <linux-kernel@vger.kernel.org>,
	bpf <bpf@vger.kernel.org>,
	linux-security-module@vger.kernel.org,
	Brendan Jackman <jackmanb@google.com>,
	Florent Revest <revest@google.com>,
	Thomas Garnier <thgarnie@google.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	James Morris <jmorris@namei.org>,
	Kees Cook <keescook@chromium.org>, Paul Turner <pjt@google.com>,
	Jann Horn <jannh@google.com>,
	Florent Revest <revest@chromium.org>,
	Brendan Jackman <jackmanb@chromium.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: [PATCH bpf-next v6 7/8] bpf: lsm: Add selftests for BPF_PROG_TYPE_LSM
Date: Thu, 26 Mar 2020 14:36:17 +0100	[thread overview]
Message-ID: <20200326133617.GC8575@chromium.org> (raw)
In-Reply-To: <CAEf4BzbzfbTT9x3tfLrqhYgozcvxvHvKSVkvyuNqji=aNgvmZg@mail.gmail.com>

On 25-Mär 19:01, Andrii Nakryiko wrote:
> On Wed, Mar 25, 2020 at 8:27 AM KP Singh <kpsingh@chromium.org> wrote:
> >
> > From: KP Singh <kpsingh@google.com>
> >
> > * Load/attach a BPF program that hooks to file_mprotect (int)
> >   and bprm_committed_creds (void).
> > * Perform an action that triggers the hook.
> > * Verify if the audit event was received using the shared global
> >   variables for the process executed.
> > * Verify if the mprotect returns a -EPERM.
> >
> > Signed-off-by: KP Singh <kpsingh@google.com>
> > Reviewed-by: Brendan Jackman <jackmanb@google.com>
> > Reviewed-by: Florent Revest <revest@google.com>
> > Reviewed-by: Thomas Garnier <thgarnie@google.com>
> > ---
> >  tools/testing/selftests/bpf/config            |  2 +
> >  .../selftests/bpf/prog_tests/test_lsm.c       | 84 +++++++++++++++++++
> >  tools/testing/selftests/bpf/progs/lsm.c       | 48 +++++++++++
> >  3 files changed, 134 insertions(+)
> >  create mode 100644 tools/testing/selftests/bpf/prog_tests/test_lsm.c
> >  create mode 100644 tools/testing/selftests/bpf/progs/lsm.c
> >
> 
> [...]
> 
> > +
> > +int exec_cmd(int *monitored_pid)
> > +{
> > +       int child_pid;
> > +
> > +       child_pid = fork();
> > +       if (child_pid == 0) {
> > +               *monitored_pid = getpid();
> > +               execvp(CMD_ARGS[0], CMD_ARGS);
> > +               return -EINVAL;
> > +       } else if (child_pid > 0)
> 
> This test is part of test_progs, so let's be a good citizen and wait
> for your specific child. I'd rather not hunt for elusive bugs later,
> so please use waitpid() instead.

Good idea. Done.

- KP

> 
> Otherwise looks good and clean, thanks!
> 
> > +               return wait(NULL);
> > +
> > +       return -EINVAL;
> > +}
> > +
> 
> [...]

  reply	other threads:[~2020-03-26 13:36 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-25 15:26 [PATCH bpf-next v6 0/8] MAC and Audit policy using eBPF (KRSI) KP Singh
2020-03-25 15:26 ` [PATCH bpf-next v6 1/8] bpf: Introduce BPF_PROG_TYPE_LSM KP Singh
2020-03-26  1:51   ` Andrii Nakryiko
2020-03-26 13:11     ` KP Singh
2020-03-25 15:26 ` [PATCH bpf-next v6 2/8] security: Refactor declaration of LSM hooks KP Singh
2020-03-25 22:25   ` Casey Schaufler
2020-03-25 23:46     ` KP Singh
2020-03-25 15:26 ` [PATCH bpf-next v6 3/8] bpf: lsm: provide attachment points for BPF LSM programs KP Singh
2020-03-25 19:28   ` Kees Cook
2020-03-25 19:39     ` KP Singh
2020-03-25 20:07       ` Kees Cook
2020-03-25 20:14         ` KP Singh
2020-03-25 15:26 ` [PATCH bpf-next v6 4/8] bpf: lsm: Implement attach, detach and execution KP Singh
2020-03-26  1:49   ` Andrii Nakryiko
2020-03-26 13:35     ` KP Singh
2020-03-25 15:26 ` [PATCH bpf-next v6 5/8] bpf: lsm: Initialize the BPF LSM hooks KP Singh
2020-03-25 19:30   ` Kees Cook
2020-03-25 15:26 ` [PATCH bpf-next v6 6/8] tools/libbpf: Add support for BPF_PROG_TYPE_LSM KP Singh
2020-03-26  1:56   ` Andrii Nakryiko
2020-03-25 15:26 ` [PATCH bpf-next v6 7/8] bpf: lsm: Add selftests " KP Singh
2020-03-26  2:01   ` Andrii Nakryiko
2020-03-26 13:36     ` KP Singh [this message]
2020-03-25 15:26 ` [PATCH bpf-next v6 8/8] bpf: lsm: Add Documentation KP Singh
2020-03-25 19:24 ` [PATCH bpf-next v6 0/8] MAC and Audit policy using eBPF (KRSI) Kees Cook
2020-03-25 19:42   ` KP Singh

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