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Message-ID: <7379a5fd-5593-c6ce-40fd-c543dcf70d2b@huawei.com>
Date: Tue, 29 Nov 2022 09:42:27 +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
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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