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[2003:d8:2f4f:1300:42f1:98e5:ddf8:3a76]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3c70ef55aabsm12458636f8f.23.2025.08.25.12.21.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 25 Aug 2025 12:21:29 -0700 (PDT) Message-ID: Date: Mon, 25 Aug 2025 21:21:28 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] selftests/mm: use calloc instead of malloc in pagemap_ioctl.c To: I Viswanath , shuah@kernel.org Cc: akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, skhan@linuxfoundation.org, linux-kernel-mentees@lists.linux.dev References: <20250825170643.63174-1-viswanathiyyappan@gmail.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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20250825170643.63174-1-viswanathiyyappan@gmail.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: Xe-UyPbKp_P_01uOTektFzNamtbffR_urc3ywtfXWLQ_1756149691 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: rspam07 X-Rspamd-Queue-Id: 17E1940005 X-Stat-Signature: 9qc1eeeytsofnnpghefjiqhbnf1i1upi X-Rspam-User: X-HE-Tag: 1756149693-356045 X-HE-Meta: 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 oqksEzDA RgbxC8iyKETQQYvgcIZNUCRew8zUOKvD6jcxuLmU5epjgmOJN5CUe2R4Wm3hQhhHP6y6UExzlQcvSi+uzsVN/skp7iJGHhva/2QFsRxHPKq0h5tVFf1vbs46XA3tQXRxChmAxhczd8XoCU/fuE1j34/0u9rRWGj3xWre+XoapphtMUxuHZtmRPWvOmv/QUPTkHx1rJ/h9zsRgpiXSJCh0Rp7++I4bb4A8ZwV4pPYVrJz2Fo8meazytRy/iqyHnUrev2LLFtXvk12U0l1vNZcmh1v+uI9JNoZTTjIsUqThFR5mxyCWAj6LlQZto870pElSFG6CLk89C02UqOYyjxS2QF0vcU+IPYazgXL/CYETfL4LiMKfNQySBv+yEfGDCvSqXUf0Kz7JITxDtAczQjHkY1bPm/CxXPgbTFFwUS6rVmikmPan4WY+sNSSR55sK2GuPPRkaZSBzmt2R08rGs9y08iEYVvgHSQGHpxdcqiO2uynKfMoZ+7zR0cOafH8gxeqrc8A 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 25.08.25 19:06, I Viswanath wrote: > As per Documentation/process/deprecated.rst, dynamic size calculations > should not be performed in memory allocator arguments due to possible > overflows. > > Replaced malloc with calloc to avoid open-ended arithmetic > and prevent possible overflows. > > Signed-off-by: I Viswanath Acked-by: David Hildenbrand -- Cheers David / dhildenb