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[2003:cb:c739:600:d2fb:3a8a:9944:7910]) by smtp.gmail.com with ESMTPSA id j1-20020a05600c1c0100b00419ea5fb0cbsm9148814wms.42.2024.04.22.08.10.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Apr 2024 08:10:16 -0700 (PDT) Message-ID: Date: Mon, 22 Apr 2024 17:10:15 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [mm?] WARNING in __page_table_check_ptes_set To: Peter Xu Cc: syzbot , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, pasha.tatashin@soleen.com, syzkaller-bugs@googlegroups.com References: <000000000000ca4df20616a0fe16@google.com> <71cf84d4-77d2-42d7-a649-b67497b171f6@redhat.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: 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-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 7DEBDC0016 X-Rspam-User: X-Stat-Signature: 8o1gxou3n4oh1w1n4egmn3zjo6ir8m88 X-HE-Tag: 1713798620-673835 X-HE-Meta: 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 81wLkC2m 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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: >> commit f369b07c861435bd812a9d14493f71b34132ed6f >> Author: Peter Xu >> Date: Thu Aug 11 16:13:40 2022 -0400 >> >> mm/uffd: reset write protection when unregister with wp-mode >> >> >> close should behave just like unregister. >> >> >> Simplified+readable reproducer: >> >> #define _GNU_SOURCE >> >> #include >> #include >> #include >> #include >> #include >> #include >> #include >> #include >> >> int main(void) >> { >> void *src = mmap(0, 4096, PROT_READ, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); >> void *dst = mmap(0, 4096, PROT_READ, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); >> struct uffdio_register uffdio_register = {}; >> struct uffdio_copy uffdio_copy = {}; >> struct uffdio_api uffdio_api = {}; >> int uffd; >> >> uffd = syscall(SYS_userfaultfd, O_CLOEXEC | O_NONBLOCK | UFFD_USER_MODE_ONLY); >> uffdio_api.api = UFFD_API; >> ioctl(uffd, UFFDIO_API, &uffdio_api); >> >> uffdio_register.range.start = (uintptr_t)dst; >> uffdio_register.range.len = 4096; >> uffdio_register.mode = UFFDIO_REGISTER_MODE_WP; >> ioctl(uffd, UFFDIO_REGISTER, &uffdio_register); >> >> uffdio_copy.dst = (uintptr_t)dst; >> uffdio_copy.src = (uintptr_t)src; >> uffdio_copy.len = 4096; >> uffdio_copy.mode = UFFDIO_COPY_MODE_DONTWAKE|UFFDIO_COPY_MODE_WP; >> ioctl(uffd, UFFDIO_COPY, &uffdio_copy); >> >> close(uffd); >> >> mprotect(dst, 4096, PROT_READ|PROT_WRITE); >> return 0; >> } > > Thanks, I'll post a patch. > > PS: next time feel free to try "strace ./reproducer", it'll do the > translations and I found it handy to work with syzbot. Cool, was not aware that it would do that amount of translation! -- Cheers, David / dhildenb