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[149.14.88.26]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4a61116c02asm86858761cf.32.2025.06.11.06.20.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Jun 2025 06:20:59 -0700 (PDT) Message-ID: Date: Wed, 11 Jun 2025 15:20:57 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] selftests/mm: Check for YAMA ptrace_scope configuraiton before modifying it To: Mark Brown , Andrew Morton , Shuah Khan , Mike Rapoport Cc: linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250610-selftest-mm-enable-yama-v1-1-0097b6713116@kernel.org> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20250610-selftest-mm-enable-yama-v1-1-0097b6713116@kernel.org> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: P2sv8iN-PCIkv6ci1Jfy4sHs_Ig4DcAaEJF8lzGDtt0_1749648076 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: ucghdiiqzn4u7e4n78659w1tpw8m6se6 X-Rspamd-Queue-Id: D5247100008 X-Rspam-User: X-Rspamd-Server: rspam09 X-HE-Tag: 1749648077-534649 X-HE-Meta: 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 jZiPfkiD 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 10.06.25 16:07, Mark Brown wrote: > When running the memfd_secret test run_vmtests.sh unconditionally tries > to confgiure the YAMA LSM's ptrace_scope configuration, leading to an error > if YAMA is not in the running kernel: > > # ./run_vmtests.sh: line 432: /proc/sys/kernel/yama/ptrace_scope: No such file or directory > # # ---------------------- > # # running ./memfd_secret > # # ---------------------- > > Check that this file is present before trying to write to it. > > The indentation here is a bit odd, and it doesn't seem great that we > configure but don't restore ptrace_scope. > > Signed-off-by: Mark Brown > --- Acked-by: David Hildenbrand -- Cheers, David / dhildenb