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[2003:cb:c72f:ed00:9dc2:1adb:d133:4434]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3687868ac54sm10652507f8f.28.2024.07.23.01.28.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 23 Jul 2024 01:28:16 -0700 (PDT) Message-ID: Date: Tue, 23 Jul 2024 10:28:15 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: mm/gup.o: warning: objtool: faultin_page_range+0x100: unreachable instruction To: kernel test robot Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List References: <202407230630.3vGhnlFB-lkp@intel.com> 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: <202407230630.3vGhnlFB-lkp@intel.com> X-Mimecast-Spam-Score: 0 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: 91aogzmwo5kpq8gicxecfisbyzy4s68j X-Rspamd-Queue-Id: 6FB26A0023 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1721723300-585117 X-HE-Meta: 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 XN+KUisk 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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 23.07.24 00:56, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 933069701c1b507825b514317d4edd5d3fd9d417 > commit: 631426ba1d45a8672b177ee85ad4cabe760dd131 mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly > date: 3 months ago > config: loongarch-randconfig-001-20240722 (https://download.01.org/0day-ci/archive/20240723/202407230630.3vGhnlFB-lkp@intel.com/config) > compiler: loongarch64-linux-gcc (GCC) 14.1.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240723/202407230630.3vGhnlFB-lkp@intel.com/reproduce) > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-kbuild-all/202407230630.3vGhnlFB-lkp@intel.com/ > > All warnings (new ones prefixed by >>): > > mm/gup.o: warning: objtool: get_user_pages_remote+0x160: unreachable instruction > mm/gup.o: warning: objtool: get_user_pages+0x12c: unreachable instruction > mm/gup.o: warning: objtool: get_user_pages_unlocked+0x138: unreachable instruction > mm/gup.o: warning: objtool: __gup_longterm_locked+0x3d8: unreachable instruction >>> mm/gup.o: warning: objtool: faultin_page_range+0x100: unreachable instruction > > > objdump-func vmlinux.o faultin_page_range: > I'm afraid I don't know how serious I should take this report :/ The commit is 3 month old and was found on some toolchain with some randconfig on some architecture, in code that is not particularly architecture specific. I wish I could even understand from the report what is happening here ("unreachable instruction" -- isn't that the compilers fault if it generates that such that objtool would complain? Why is that a C code issue?) Please, someone shout if I should take a closer look at this. -- Cheers, David / dhildenb