From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7FB74C2BA19 for ; Mon, 6 Apr 2020 12:02:35 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 151B12078A for ; Mon, 6 Apr 2020 12:02:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=web.de header.i=@web.de header.b="aPF4UsVE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 151B12078A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=web.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48wq0m5J9DzDqkX for ; Mon, 6 Apr 2020 22:02:32 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=web.de (client-ip=217.72.192.78; helo=mout.web.de; envelope-from=markus.elfring@web.de; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=web.de Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; secure) header.d=web.de header.i=@web.de header.a=rsa-sha256 header.s=dbaedf251592 header.b=aPF4UsVE; dkim-atps=neutral Received: from mout.web.de (mout.web.de [217.72.192.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 48wpyg3XwSzDqjn for ; Mon, 6 Apr 2020 22:00:42 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1586174417; bh=aT+GoHz8EU0Xuk1glzSyos3tix2HwJQpv2+cwNsQqOw=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=aPF4UsVEzECJrWfA6SrRpyUVTqu9Es1MDaPAB3vDPISacd4myeRN/BA29+KYIyt/v yZfOqq8gZkrRrSW0LsyKoLmaHYHpCPun3Mf0CMgacNya+2pmbA7Ln532LZ9pv4oZgc 32mU5La+ax/MVl2VgtN0Trv1cNDkiFcg1fo9NLg0= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.3] ([2.243.176.200]) by smtp.web.de (mrweb103 [213.165.67.124]) with ESMTPSA (Nemesis) id 0MfHk6-1jeics3JsI-00OnR9; Mon, 06 Apr 2020 14:00:16 +0200 Subject: Re: [PATCH v4] powerpc/powernv: add NULL check after kzalloc in opal_add_one_export To: Qiujun Huang , linuxppc-dev@lists.ozlabs.org References: <20200406093944.4174-1-hqjagain@gmail.com> <87eet0sy79.fsf@mpe.ellerman.id.au> 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: Mon, 6 Apr 2020 14:00:12 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:MIrbXLldFHhN1dFqtAD7lfwsCiuObMJvbL5nCfgLfRWR81OvnWK /gr5hvWcJkcqqsdLuUz5xCq5j46548CRDAFUa6iTMMJ/HgGuWltL6s//zZPIEBW9mEFQjQY hKcVNV4JJoLNkNQfHT41jCWCG9BxV4NCWyXPUZwh5IHYWtZllEv48Ceh4K9zOZwnzuqdL76 Y4ViTMInscENY54zkH5zg== X-UI-Out-Filterresults: notjunk:1;V03:K0:DDx9Oxc4dOs=:iBu+oIxMSXjXX4lDsS9KdV QHyFdaB7LikOgZ8VExTOTbzxH/pS+cbe4Y8OT4moYdfAykwcvY5PsN5oTlXboq2Mcjjx3GZko 1blpLAWJdX6qbPnqGtOofbAd2yc5mWI3MQsKN0HUOp/SQYyQ6Hv0iUzpl28sqhaGcFXpZ8fk0 XlNMB7rGrLqS9+2zZ1gZzKH376Xjo+/NGLR9wg2uYgjFiSehm4Hnk/uMQPYpNXoalAq7dg6fa TGZzB5k2G+TdbUV/xWiOIidF1wbETIpk8Mj3JGgisqmPb47NQMOdlB1q797e8jZbsK0/Bs1jT o6lUke+PeVZVYx0mn8zvqJ3h07ijwOPMvTPlZPE3JU0PKcxDbSA4MsczMaI/cO6exOXtvJMIW 7T6qRJLQ6Pe6+HyTazh1Nk3YNKILAFXH4ZEVgx+B91XQqyETLmekEJ7PoZ3zrabI+RISkKqAD VZkP7d+PkKZGunhr2p64MxeVD3xEatJ1L5gWx5Gws2JAZ2NQJQoITmHbmuMl4EhZRistdjNSR SeDm+6JxsjRmModZuy5Y1e9oaewwB9IUYAQn2xpJxMBGjtgIUmLusG6+77Zdp+feHFI7r5GtW jeJ9s1GqG2hI6DwK0Lv19jrw7NNqh+lic7whXzfqxIOrsVnkt0KHLqpBEBl0R/4HTRepUsKMv pVx/BmmxX4bFdCZVIpPfzc8Iyy4uSOTaYEAReqoBDr5Fha0RrAJJJ1KSRNs3uMTD6QXoPvwDi 2Qkdnk43grCUEVfoW48RDjOot6FQL+Usopqb7DPYeaKY4+JOxdSNnoXImco5q+2GfdMwn0ell 7N8awBmC5qiebRXok04jTgdDPhZdV5AvhJPDmOnHf4rnB6RkRZAjjfSFUg2x03ju6RaFS+RR2 6O2ukrZdM/Z2tC/AGpBWkdJ5SMKwa3C2pvjlBhd7g3QJD1vSF6Y06IEjf4uG0CBmXY0C08c/B QMkdZ0I+1vOHdBnqCzY85RIbGSjGQDknYtcYsvengBwpR6sJirgEkfpKc2BNDiQRNPkev2LH+ bDPTDoLntHDhpE3vHZtr3BuLMv8r/6SzVx7Ro3pEvZiK7YBGLGSowi+176oMdnPm0bC4Prk0C M/gXcYgpquWcu8xECuh82aZfdYblY6tLxWjofl/U4MjIMIK2AFMyk6Vki95ycb/vIaIARFjjH EojgwJzIiGSZ/2AssbL+O9a00XJWblMXKnTbQCB+UwTE9PoI/yP42Y5S7uBZfcs7cbBKSzmM+ VOt0ht6QM5iMrDSve X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: LKML , Oliver O'Halloran , Paul Mackerras , Thomas Gleixner Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" >>> Here needs a NULL check as kzalloc may fail returning NULL. I find this wording potentially confusing. * Such function calls will usually succeed to return a pointer. * The desired memory allocation can fail. * Please choose an imperative wording for the change description. >>> Issue was found by coccinelle. Please omit this line after the addition for the reference to the SmPL scr= ipt. >>> Generated by: scripts/coccinelle/null/kmerr.cocci =E2=80=A6 >>> Reviewed-by: Oliver O'Halloran I wonder about this tag because of requested changes for the shown patch a= pproach. I recommend to add the tag =E2=80=9CFixes=E2=80=9D. >> Thanks for putting up with all the review comments :) This seems to become challenging here. >> But I think this should actually be two patches now. =E2=80=A6 > Get that, I'll separate them. I wonder why it was not directly tried in this patch version. >>> v3->v4: I suggest to apply a shorter version numbering format (without an arrow). Regards, Markus