Re: [PATCH -next] selftests/landlock: Fix selftest ptrace_test run fail

[Mickaël Salaün]

I tested with next-20221116 and all tests are OK. Could you share your 
kernel configuration with a link? What is the content of /proc/cmdline?

On 29/11/2022 02:42, limin wrote:
> I run test on Linux ubuntu2204 6.1.0-next-20221116
>
> I did't use yama.
>
> you can reproduce by this step:
>
> cd kernel_src
>
> cd tools/testing/selftests/landlock/
> make
> ./ptrace_test
>
>
>
>
> On 2022/11/29 3:44, Mickaël Salaün wrote:
> > This patch changes the test semantic and then cannot work on my test
> > environment. On which kernel did you run test? Do you use Yama or
> > something similar?
> >
> > On 28/11/2022 03:04, limin wrote:
> > > Tests PTRACE_ATTACH and PTRACE_MODE_READ on the parent,
> > > trace parent return -1 when child== 0
> > > How to reproduce warning:
> > > $ make -C tools/testing/selftests TARGETS=landlock run_tests
> > >
> > > Signed-off-by: limin <limin100@xxxxxxxxxx>
> > > ---
> > >    tools/testing/selftests/landlock/ptrace_test.c | 5 ++---
> > >    1 file changed, 2 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/tools/testing/selftests/landlock/ptrace_test.c
> > > b/tools/testing/selftests/landlock/ptrace_test.c
> > > index c28ef98ff3ac..88c4dc63eea0 100644
> > > --- a/tools/testing/selftests/landlock/ptrace_test.c
> > > +++ b/tools/testing/selftests/landlock/ptrace_test.c
> > > @@ -267,12 +267,11 @@ TEST_F(hierarchy, trace)
> > >            /* Tests PTRACE_ATTACH and PTRACE_MODE_READ on the parent. */
> > >            err_proc_read = test_ptrace_read(parent);
> > >            ret = ptrace(PTRACE_ATTACH, parent, NULL, 0);
> > > +        EXPECT_EQ(-1, ret);
> > > +        EXPECT_EQ(EPERM, errno);
> > >            if (variant->domain_child) {
> > > -            EXPECT_EQ(-1, ret);
> > > -            EXPECT_EQ(EPERM, errno);
> > >                EXPECT_EQ(EACCES, err_proc_read);
> > >            } else {
> > > -            EXPECT_EQ(0, ret);
> > >                EXPECT_EQ(0, err_proc_read);
> > >            }
> > >            if (ret == 0) {