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Shutemov" , Navid Emamdoost References: <20191213223751.4089-1-navid.emamdoost@gmail.com> Subject: Re: [PATCH v2] mm/gup: Fix memory leak in __gup_benchmark_ioctl To: Navid Emamdoost , Ira Weiny , John Hubbard , linux-mm@kvack.org From: Markus Elfring Autocrypt: addr=Markus.Elfring@web.de; prefer-encrypt=mutual; keydata= mQINBFg2+xABEADBJW2hoUoFXVFWTeKbqqif8VjszdMkriilx90WB5c0ddWQX14h6w5bT/A8 +v43YoGpDNyhgA0w9CEhuwfZrE91GocMtjLO67TAc2i2nxMc/FJRDI0OemO4VJ9RwID6ltwt mpVJgXGKkNJ1ey+QOXouzlErVvE2fRh+KXXN1Q7fSmTJlAW9XJYHS3BDHb0uRpymRSX3O+E2 lA87C7R8qAigPDZi6Z7UmwIA83ZMKXQ5stA0lhPyYgQcM7fh7V4ZYhnR0I5/qkUoxKpqaYLp YHBczVP+Zx/zHOM0KQphOMbU7X3c1pmMruoe6ti9uZzqZSLsF+NKXFEPBS665tQr66HJvZvY GMDlntZFAZ6xQvCC1r3MGoxEC1tuEa24vPCC9RZ9wk2sY5Csbva0WwYv3WKRZZBv8eIhGMxs rcpeGShRFyZ/0BYO53wZAPV1pEhGLLxd8eLN/nEWjJE0ejakPC1H/mt5F+yQBJAzz9JzbToU 5jKLu0SugNI18MspJut8AiA1M44CIWrNHXvWsQ+nnBKHDHHYZu7MoXlOmB32ndsfPthR3GSv jN7YD4Ad724H8fhRijmC1+RpuSce7w2JLj5cYj4MlccmNb8YUxsE8brY2WkXQYS8Ivse39MX BE66MQN0r5DQ6oqgoJ4gHIVBUv/ZwgcmUNS5gQkNCFA0dWXznQARAQABtCZNYXJrdXMgRWxm cmluZyA8TWFya3VzLkVsZnJpbmdAd2ViLmRlPokCVAQTAQgAPhYhBHDP0hzibeXjwQ/ITuU9 Figxg9azBQJYNvsQAhsjBQkJZgGABQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJEOU9Figx g9azcyMP/iVihZkZ4VyH3/wlV3nRiXvSreqg+pGPI3c8J6DjP9zvz7QHN35zWM++1yNek7Ar OVXwuKBo18ASlYzZPTFJZwQQdkZSV+atwIzG3US50ZZ4p7VyUuDuQQVVqFlaf6qZOkwHSnk+ CeGxlDz1POSHY17VbJG2CzPuqMfgBtqIU1dODFLpFq4oIAwEOG6fxRa59qbsTLXxyw+PzRaR LIjVOit28raM83Efk07JKow8URb4u1n7k9RGAcnsM5/WMLRbDYjWTx0lJ2WO9zYwPgRykhn2 sOyJVXk9xVESGTwEPbTtfHM+4x0n0gC6GzfTMvwvZ9G6xoM0S4/+lgbaaa9t5tT/PrsvJiob kfqDrPbmSwr2G5mHnSM9M7B+w8odjmQFOwAjfcxoVIHxC4Cl/GAAKsX3KNKTspCHR0Yag78w i8duH/eEd4tB8twcqCi3aCgWoIrhjNS0myusmuA89kAWFFW5z26qNCOefovCx8drdMXQfMYv g5lRk821ZCNBosfRUvcMXoY6lTwHLIDrEfkJQtjxfdTlWQdwr0mM5ye7vd83AManSQwutgpI q+wE8CNY2VN9xAlE7OhcmWXlnAw3MJLW863SXdGlnkA3N+U4BoKQSIToGuXARQ14IMNvfeKX NphLPpUUnUNdfxAHu/S3tPTc/E/oePbHo794dnEm57LuuQINBFg2+xABEADZg/T+4o5qj4cw nd0G5pFy7ACxk28mSrLuva9tyzqPgRZ2bdPiwNXJUvBg1es2u81urekeUvGvnERB/TKekp25 4wU3I2lEhIXj5NVdLc6eU5czZQs4YEZbu1U5iqhhZmKhlLrhLlZv2whLOXRlLwi4jAzXIZAu 76mT813jbczl2dwxFxcT8XRzk9+dwzNTdOg75683uinMgskiiul+dzd6sumdOhRZR7YBT+xC wzfykOgBKnzfFscMwKR0iuHNB+VdEnZw80XGZi4N1ku81DHxmo2HG3icg7CwO1ih2jx8ik0r riIyMhJrTXgR1hF6kQnX7p2mXe6K0s8tQFK0ZZmYpZuGYYsV05OvU8yqrRVL/GYvy4Xgplm3 DuMuC7/A9/BfmxZVEPAS1gW6QQ8vSO4zf60zREKoSNYeiv+tURM2KOEj8tCMZN3k3sNASfoG fMvTvOjT0yzMbJsI1jwLwy5uA2JVdSLoWzBD8awZ2X/eCU9YDZeGuWmxzIHvkuMj8FfX8cK/ 2m437UA877eqmcgiEy/3B7XeHUipOL83gjfq4ETzVmxVswkVvZvR6j2blQVr+MhCZPq83Ota xNB7QptPxJuNRZ49gtT6uQkyGI+2daXqkj/Mot5tKxNKtM1Vbr/3b+AEMA7qLz7QjhgGJcie qp4b0gELjY1Oe9dBAXMiDwARAQABiQI8BBgBCAAmFiEEcM/SHOJt5ePBD8hO5T0WKDGD1rMF Alg2+xACGwwFCQlmAYAACgkQ5T0WKDGD1rOYSw/+P6fYSZjTJDAl9XNfXRjRRyJSfaw6N1pA Ahuu0MIa3djFRuFCrAHUaaFZf5V2iW5xhGnrhDwE1Ksf7tlstSne/G0a+Ef7vhUyeTn6U/0m +/BrsCsBUXhqeNuraGUtaleatQijXfuemUwgB+mE3B0SobE601XLo6MYIhPh8MG32MKO5kOY hB5jzyor7WoN3ETVNQoGgMzPVWIRElwpcXr+yGoTLAOpG7nkAUBBj9n9TPpSdt/npfok9ZfL /Q+ranrxb2Cy4tvOPxeVfR58XveX85ICrW9VHPVq9sJf/a24bMm6+qEg1V/G7u/AM3fM8U2m tdrTqOrfxklZ7beppGKzC1/WLrcr072vrdiN0icyOHQlfWmaPv0pUnW3AwtiMYngT96BevfA qlwaymjPTvH+cTXScnbydfOQW8220JQwykUe+sHRZfAF5TS2YCkQvsyf7vIpSqo/ttDk4+xc Z/wsLiWTgKlih2QYULvW61XU+mWsK8+ZlYUrRMpkauN4CJ5yTpvp+Orcz5KixHQmc5tbkLWf x0n1QFc1xxJhbzN+r9djSGGN/5IBDfUqSANC8cWzHpWaHmSuU3JSAMB/N+yQjIad2ztTckZY pwT6oxng29LzZspTYUEzMz3wK2jQHw+U66qBFk8whA7B2uAU1QdGyPgahLYSOa4XAEGb6wbI FEE= Message-ID: Date: Sat, 14 Dec 2019 19:10:55 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <20191213223751.4089-1-navid.emamdoost@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:Z2llYW6Q3ZSeXcueD70uzihWFfG/5gKIJOlWGa0ESJq6KmWMBa0 DlqOa+J1K/IYRU4SQGDrat/VJvagrPcfdazp87N44x1QIyZNbI7ADKUMF9iAPU/Ws2HyMGw ua9D+7MN4Teof8XWCEQnLcIA7zMCrpRRmdZrJFDqmWbFDU+1aZW4kQxYciMowo7lreO/D7W Oxyt4fqGxLk5OtFBEparw== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:ugHcgFata8U=:lTaahgWn8Cdd6Uxl62UVeK 4C714fl4OSE3sxAOTPWBCL5FhDtYwMlAhedUNl5XzWZWvc6ArnCcqEFV8zeAc+j437Ee0hrB+ HAidjA+Z3XyCioDSxpBylRbzaFQjBBM3t9UF7CdAwAci6wcgPOg8LyvXGLwQgG8/M3E7/gdKF DQbfImnuDseo531mFJzB5beVG1Wt1k9+RN89oRo3bxZssABujvCiT7KeM0xY4UBBbXPt8/x1P 9oY35hyZDE3cSNWyFR+txyUIwfNERVIMLben89Co+cA9yK32tQDV2PiD1g0ofoxxsaRskTjtp QNJp87DvHhmKcTlzbAGaoy33tQHOzJK/Xc3OLDjffzYDI/nJQFhYCb2aaP+BiU+HgqoYs1C38 oWrCYZYhCWyHQ6VKutJQK2HI1TZyX2SKKoCOzYIaVm/X7klP04ack7FHUGkBoipxr+yTC/CX6 3exMGLCQnRirZ97aWdO3vToHi76WzRtFTcE9LKTniK/Mkpvx9IA5SKsqtyzAvBVJ7pEdvGN5M CZV+bl/pImIJV5zdX7Ph2dz8w3wVLQWlHJYAQ1DjBzTDT3lAMRrIryC8vNdtACsO229y85tzF QCUPn7Rj4qib9ezLUOQH+n0lf/CHlzZL2fdOxjPSG3Ed3H1EECpPnsrkAIBMGpYENpYExPj8Z 8kaQ1oChtDF+vT5gqC015HVCDrqLxCTBJkeJCpfpRBBDE8ubhW3lL+ZDUumCKbjbOsyZvLVWI CWsJrtFYBLzTPMo3mz+YsIgDskAuCA47YV9A7GqfDt4Q2ssEZkvpjdKOX7woFkTRy1bK+ZcA3 GvYbeUbOjPUrvwQWbMyVRTUqBnE83SwCG7WzZGItkYgi6HvOVLgB4rqHftktnP84k07eD0JlN j/en5MLb1T3zC1a50v2fKFAnDWXxIm3BGylB1quNc7zRRx54KSf5LsA73WCVJQxU0Nc7totX3 RFo4nSbPUz4P/j2Y2FuWdoISdPHlPeJwIOs0rMy/h/Jyz/Ov0V3g1vNvYdz78wqlOSDt9+Nl2 IJxI4mTc6QEfip/bXfKVqRTso+dNs0Ka0UYc4Z4pZcsZjt1m+rk2VQFV+UfhscbY/3Dnt6Q2n 9deAZ8b/qKX/+G2bwymHF0/wuy460hrXf/Nq/u46z3m+/GJeVyFyW/lTbEpAUNtKQSqThzH7P Dt6fUiEni0vcXf7MND7xn8aZ3S+K9x0qPDnhcWYFowQPzCNcyaZVquaSWieMvc4enw3asf/mj Zr0qztsmUBZpg7wXXwk25SrI8mls4pGXejazQ+XKe+722BunnXIyEZQkbbWA= Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org =E2=80=A6 > +++ b/mm/gup_benchmark.c =E2=80=A6 > @@ -85,8 +85,9 @@ static int __gup_benchmark_ioctl(unsigned int cmd, > end_time =3D ktime_get(); > gup->put_delta_usec =3D ktime_us_delta(end_time, start_time); > > +done: > kvfree(pages); > - return 0; > + return ret; > } > > static long gup_benchmark_ioctl(struct file *filep, unsigned int cmd, Can the addition of a label like =E2=80=9Cfree_pages=E2=80=9D be more appr= opriate here? Regards, Markus