Received: by 2002:a25:ef43:0:0:0:0:0 with SMTP id w3csp1223729ybm; Sat, 30 May 2020 02:27:21 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwWQ9KnksGDKeWc3X3dRR9ZlSQtCVuqIwLkQ5oigzjICkTTABRc5AeLq4iCMEPG99cgOhA4 X-Received: by 2002:a05:6402:357:: with SMTP id r23mr12191425edw.230.1590830840924; Sat, 30 May 2020 02:27:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1590830840; cv=none; d=google.com; s=arc-20160816; b=aBW4MrW9KiQLEXkm1GPPYpzCjmfhImGe3TbJOA1eDw9jOqDSqeEp1bQtYTaoWQYaKC jfG/jWH9eyPETHfyOUMkaZ0sD/7oMqXp9nEYmzwj3S3HD+S08HcptTAjh1UdbiAJS0Ij RsJdaKxS31trToFQJ4zJ0cSLaGOGLJKB6q6Q9pFooDSNDbRNiBG2QNjfR/1Qt58gEp9K na+3CTvaIXtEIZytlXbo229LdG2AIaCoTxvm4wKRZ7vWvM+fwIFDdx5u1bCbJBTu4xpQ usHUJpyzU1ttxx4uu19z82W16+URULui3YioQn7tNsk6BKAWkNqzVItMsL5Y6+tOQAdA VCBQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:mime-version:user-agent:date:message-id:autocrypt :from:subject:cc:to:dkim-signature; bh=twtscBheMlJsZiveAf69uhR4y7ZHLrG0SnprN7nwbuA=; b=dO151SAiYC0E2qQkIqVgAJBoZBxH7bWCrHaOygDYYBh/Z3J+sn3uFAwW4YgdTHaKlH nZzv4Z/YSrfKx6FsHii37pFqZ50RcKxlvzqIMOmcG5Qd0wWpz+071WlRTYMDEyyTot3g 0KsvclwQR5bUMFQRb36wT6sO3bszjj9WJBEw5EgiNK0gSFBDqoHjeXvAhjX/jlwesnEP F/QRsh6pNfEYC17YcaqRL1KROk051bUtx5gWrmkjBuO+9L5ffksLHRl7koU7T3144UKO /OZim2fYR4tZyFDUpbmQX5PFd2y9pST4C65v/iLuoGGi1p9dMES8g3hQEbFZL1x3zMV2 H7uQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@web.de header.s=dbaedf251592 header.b=ft0vF7pA; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id g19si6759075ejh.598.2020.05.30.02.26.57; Sat, 30 May 2020 02:27:20 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@web.de header.s=dbaedf251592 header.b=ft0vF7pA; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728638AbgE3JYu (ORCPT + 99 others); Sat, 30 May 2020 05:24:50 -0400 Received: from mout.web.de ([212.227.15.4]:38461 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728071AbgE3JYt (ORCPT ); Sat, 30 May 2020 05:24:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1590830665; bh=D/PFUzv6CfvJZCUeNBxauZnNL547fXvqgd8mvATU+n4=; h=X-UI-Sender-Class:To:Cc:Subject:From:Date; b=ft0vF7pAydNWEQ0cr7OgfD8MSFywSXZqhT3qxTAnYx/4M4p3VwW2H41QRHOnHG+of d8SVjuw20aXAEUQM3gWAOilmGwQLTQkj4hzqlgKXCrAR7aL4ks2Lr6Ae8O36rDvKdl LKepEQqW1H/ufE4j1RoaSpEH4H9vtYgxsbCXX8qs= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.2] ([93.133.149.250]) by smtp.web.de (mrweb004 [213.165.67.108]) with ESMTPSA (Nemesis) id 0MdYXk-1jMLyu3quK-00POEZ; Sat, 30 May 2020 11:24:25 +0200 To: Jia-Ju Bai , linux-usb@vger.kernel.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, Colin Ian King , Felipe Balbi , Greg Kroah-Hartman , Pawel Laszczak , Peter Chen , Roger Quadros , YueHaibing Subject: Re: [PATCH] usb: cdns3: fix possible buffer overflow caused by bad DMA value 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, 30 May 2020 11:24:23 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:KwFD5huqvoEbAm6XI3CNAt5Swh4839eXZ9RLBK+8vXvQhGLEptD QBd5Tj+twa5AMOtdITWI3m1WDq9LBiZGbXBM6nZWI6W5YpFrWES8iStDf+dH6IskgnRzEYQ dU0pLZPvTZzGYBt1L3rd6wP5WvUGnSq/Eyp/g192XfGMTPx7OFjIzbM384JhQ2/zbS4Sg+n sMMAEsjfOiT87+KvfNTnw== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:o8CKB5kNA6U=:Ny4iKf/f5tf6iIhVxjCeAz HXkNFZPrM/7CFo5DMLoUC3S0hkdQHV/424RE0STuZCF/u8Nx5EtCgeMDbq5Iep5PlIx+mkdLc LQx0Hj6YGQ3ne3pE9T6BUKV2qb5/QM19KKZ99dP/KDka6TrTOBak+Z2Uv36Du2oWJfsWnsz7z D3OvXkfryTqcDVVvLAKiDQTmbQlFHAm9kDYqmmnqk66vfrHYjZ+S3TjecggKbL+Grq7froURN A1SlxeOCnk2W+/NdCHxoZOQtM5W/Hl8KZrJNGGrj5pW90PJq3zZX5JVvktOduXk5sM/WIVQqw SUyN+MwoQFVozNlDYDCVhtVGGf745pI72s6w0XEbZ5ySJsOGWX/HjZF0cFHpTSfk0xIORopDS K/3Om/zsyWT9VBrG6au76If+zDEfHe0F+AbL8NSptIXbDJz1ckXtuEYHPR5/7nOlkLebWdIGl ayNfFtBPF3IHyKgMgPTl3vBlDQ+ayE6odKUbMlz7eC+0hvEE3RXMQ5Fuzma0tuFR0IDUeONwB /OhfodGpU3i24DRMyEJT4olCgAyoKxLTDcjwtA0YWFdc5QU41Krl9oO2mRsIK4bDuciwx2tIo MuNacSspZQJcSYkqZypo/HGOuIw1xc22Oh0R2jrMUxOHb4g2Pnenz7f/mMnEyWxM7/7ZkK399 mnJMe452JL1LWghQMZPc3yCuxTRtODlNQSiDwOEsdxgGThAW9b6CAJRC58a1B3TWhdJBUM9++ Ysh36aqStCwque7QkW86LV+p9+nmNGaNt5fuzDYYsrAbqo/+v1pTs4LFd2LHh3k0PXPUH1gvP 2sMw12vqOMdpdsrjKTxj4Km1Z+N8yfMccxcgRRoZplUkAe2cc89Q6Nt0Lhj4LGMp8IPo1i+Rp w/u/up3nuccnFrOSIzp/aolASfnQujA5+N5v/txXRyGQKXjW3vpDReuxAEzWOr5FSafuQhmrR D3h8VlAWjJpDnEGYTCSST9qN/iMixRa7nyh6191+eMmq4++CXsU36UT+SLFcdvV4SwRokgG8O JH+WEwRtXy2ot2NWjfouZ/K5QEIaZHRCFRuBrgj1g2AVfhoFqong6fbPldz0eolUmujkxB+5l 5I2jzeJA8bjSl2in1lgnxYwB+vi2NmY8Mh0pLd/Ac6oUJil4WNVK/Nnz4hyuC5N5GoTRfKRsb OgYD8opB0LprHxNCnO/72deWv5iXt/VaeVBgtBDD6kii1Gpf6WjlOA2yqIOYxNJIZv6XW/FX6 dDPtgjlc63KkGvMdX Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > To fix these possible bugs, index is checked before being used. How do you think about a wording variant like the following? Thus check the index before using it further. Would you like to add the tag =E2=80=9CFixes=E2=80=9D to the commit messag= e? Regards, Markus