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Message-ID: <cae40a4b-ae99-f33d-d7f9-5a2d4dfa986b@huawei.com>
Date: Wed, 30 Nov 2022 11:40:43 +0800
From: limin <limin100@...wei.com>
To: Mickaël Salaün <mic@...ikod.net>,
<shuah@...nel.org>, <linux-kselftest@...r.kernel.org>,
<linux-security-module@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
CC: <hannes@...xchg.org>, <mhocko@...nel.org>,
<roman.gushchin@...ux.dev>, <shakeelb@...gle.com>,
<songmuchun@...edance.com>, <tj@...nel.org>,
<lizefan.x@...edance.com>
Subject: Re: [PATCH -next] selftests/landlock: Fix selftest ptrace_test run
fail
configuration
https://gitee.com/openeuler/kernel/blob/openEuler-22.09/arch/x86/configs/openeuler_defconfig
On 2022/11/29 19:03, Mickaël Salaün wrote:
> 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@...wei.com>
>>>> ---
>>>> 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) {
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