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Tue, 17 Oct 2023 15:06:05 +0900 (KST) Received: from [107.122.11.51] (unknown [107.122.11.51]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20231017060604epsmtip29607f54dabc8287380fca98bba4dcfac~Oz-Xpy4531090510905epsmtip2p; Tue, 17 Oct 2023 06:06:04 +0000 (GMT) Message-ID: <054938ef-a31e-709d-f1ea-47caedf1fdb3@samsung.com> Date: Tue, 17 Oct 2023 11:36:03 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [PATCHv2] nvme: sanitize metadata bounce buffer for reads Content-Language: en-US To: Keith Busch , hch@lst.de, linux-nvme@lists.infradead.org Cc: sagi@grimberg.me, axboe@kernel.dk, Keith Busch From: Kanchan Joshi In-Reply-To: <20231016230625.3792823-1-kbusch@meta.com> Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprKJsWRmVeSWpSXmKPExsWy7bCmpq6fil6qwcRdzBar7/azWaxcfZTJ YtKha4wWZ64uZLGYv+wpu8W61+9ZHNg8zt/byOJx+Wypx6ZVnWwem5fUe+y+2cDmce5iRQBb VLZNRmpiSmqRQmpecn5KZl66rZJ3cLxzvKmZgaGuoaWFuZJCXmJuqq2Si0+ArltmDtARSgpl iTmlQKGAxOJiJX07m6L80pJUhYz84hJbpdSClJwCkwK94sTc4tK8dL281BIrQwMDI1OgwoTs jHX3fzAVHGSqePNtBXsDYwdTFyMnh4SAicST928Zuxi5OIQEdjNKrDo1mxnC+cQo8WHZfjYI 5xujxMaNp9lhWrZv+c0KYgsJ7GWUmHHUCaLoLaPEl1+nWboYOTh4Bewk9q1yAjFZBFQlFjeZ gJTzCghKnJz5hAXEFhVIkvh1dQ4jiC0s4CZx+Mg/MJtZQFzi1pP5YNeJCPhLrNqwB2wiM1DN rlYLEJNNQFPiwuRSkApOAXOJhXv6WCE65SW2v50Ddr6EQCuHxKcla6CedJHYvegelC0s8er4 FqhPpCQ+v9vLBmEnS1yaeQ6qpkTi8Z6DULa9ROupfmaIEzQl1u/Sh9jFJ9H7+wkTSFhCgFei o00IolpR4t6kp6wQtrjEwxlLoGwPiZZpp6GB2cUo8ffGJ9YJjAqzkAJlFpLnZyF5ZxbC5gWM LKsYJVMLinPTU5NNCwzzUsvhkZ2cn7uJEZw+tVx2MN6Y/0/vECMTB+MhRgkOZiUR3vRgnVQh 3pTEyqrUovz4otKc1OJDjKbAyJnILCWanA9M4Hkl8YYmlgYmZmZmJpbGZoZK4ryvW+emCAmk J5akZqemFqQWwfQxcXBKNTAxzIldeSn1uvPUJGPxGobLoUX1Nm8cZZWXq6oq6Elvf8YYKvG+ Zs7irLg0izclEg9ffS8V3JH2dLNOreirq9VHP8xYvlzpgE2ngFmPLcPy3sUekmuKLuUJbkvr XHjPmulUiePXhIaldidDg/k+ystcqPnbeLX8hHWf4dPjU+driPke27a+7KFr3eLJ0W1RGy4+ E2H9Vbf416tJx0SdFH1NX01cZduWUvDQdb/sar/Zt56VrfDcEDkzzf7o/u1NYhtj1tf9kj5/ rLJ42ful9/g+fHryyXby6seHyplNJ734yLp9n9WJB49YBI/5/VMoe99xnvPOvBl9b4s/K3wx S13qGFqksOzmisgJr99d2vtaQomlOCPRUIu5qDgRAP/9RGgoBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrELMWRmVeSWpSXmKPExsWy7bCSvK6vil6qwe3tGhar7/azWaxcfZTJ YtKha4wWZ64uZLGYv+wpu8W61+9ZHNg8zt/byOJx+Wypx6ZVnWwem5fUe+y+2cDmce5iRQBb FJdNSmpOZllqkb5dAlfGuvs/mAoOMlW8+baCvYGxg6mLkZNDQsBEYvuW36xdjFwcQgK7GSXu r9zIDpEQl2i+9gPKFpZY+e85O0TRa0aJx/MambsYOTh4Bewk9q1yAjFZBFQlFjeZgJTzCghK nJz5hAXEFhVIkthzvxFsl7CAm8ThI/8YQWxmoPG3nswHi4sI+Ers/POXDWQMM1DNrlYLiE1d jBJv97WxgsTZBDQlLkwuBSnnFDCXWLinjxVijJlE19YuqJHyEtvfzmGewCg0C8kVs5Bsm4Wk ZRaSlgWMLKsYJVMLinPTc4sNC4zyUsv1ihNzi0vz0vWS83M3MYKjRUtrB+OeVR/0DjEycTAe YpTgYFYS4U0P1kkV4k1JrKxKLcqPLyrNSS0+xCjNwaIkzvvtdW+KkEB6YklqdmpqQWoRTJaJ g1Oqgam9fnOGYHdE19qkYMEM6StSOv//GancqLfcoL9P5vpr4/5Al1tTnQvOFVpZNq895ThT mTNe4/Tv9Jqdc48cnxs6w1ngjMs87ssb3bX74/c7nC089GGG9ZemoHf/vsXfyF7//yVPtbUc p2LkGZmvyqu04zTkJ/50DFBik/we/+GobdtEVZlFFk0FlZlRu8XubuGITpsmfe5jS+KSIr/Y oODa3HZGs5obqbZzL3Xu/FITLru4dpZ8QqDZltaXd10NirqFmJb35P55GeoUyHyF4Yqk2IPG j1dsEkyCTq8TPh1Y6/X0fsLlu3Vbtsyeyflr8cN7cz4KnEvKu8FheeZQc9jMBnOeJwV33hoe XM++TomlOCPRUIu5qDgRAMI381oFAwAA X-CMS-MailID: 20231017060605epcas5p41a7f1c7297ff6b377fce5f88edb0375f X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20231016230939epcas5p47d9b62301959586c168c9baca580c874 References: <20231016230625.3792823-1-kbusch@meta.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231016_230623_267595_05F157F6 X-CRM114-Status: UNSURE ( 8.94 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 10/17/2023 4:36 AM, Keith Busch wrote: > From: Keith Busch > > User can request more metadata bytes than the device will write. Ensure > kernel buffer is initialized so we are not leaking unsanitized memory on > the completion's copy-out. Reviewed-by: Kanchan Joshi