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De Francesco" , John Hubbard , Matthew Wilcox , Thomas Gleixner Subject: Re: [PATCH v2 1/4] highmem: Enhance is_kmap_addr() to check kmap_local_page() mappings Message-Id: <20230210135902.343f6c40001f1f2e10cedd93@linux-foundation.org> In-Reply-To: <20230203-get_kernel_pages-v2-1-f1dc4af273f1@intel.com> References: <20230203-get_kernel_pages-v2-0-f1dc4af273f1@intel.com> <20230203-get_kernel_pages-v2-1-f1dc4af273f1@intel.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam03 X-Stat-Signature: 6naesecji994je4hijkcygd139eqd4jk X-Rspamd-Queue-Id: CEEF74000A X-HE-Tag: 1676066349-370703 X-HE-Meta: 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 O3sHj0HV yQD31n4S4zx5WZmx93sPCqxB8ZpwsZB+hVvAnGLI5AjQN0MfNlFYDiWF4ie4bsnOMuqk3hSE7b++tloB1F4c2TEz7PzPlcLjDdQhVhBepjb3S64itvKFgJoQ1JLDuvDSPBBJsby5FMzK/zvs1u0aryi5tcrWv/2PafXSCHtf6sgaFobeFeBH1qKMw65cuaXlRTJJgerNwfG4vAZ01ErfgrTgiGBHmAKQYcKbUbabNVbuRrndFerr9U6DVxe1SrFouZoiS5YGoSmapn5PIGVunWBOkQ2eoE2p/soa429Xrcd7nRAdnRqro1Nr/Gp4Y6W3rtkDduht/ubFfeFCWw4SO8SANKJ+nQSzWHHHw0ogc16KjAq2/dn1Za2t87buACQodVS7zLdo1nINaX4B6ZEAjOfsJja6w9TIr65frR3DpPHHCB6ZTQVwyIluMEs6Ybp9K7TYiQTqmm3W7DI3SV05Mfe5MCyMJ6lduApUK 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: On Fri, 03 Feb 2023 20:06:32 -0800 Ira Weiny wrote: > is_kmap_addr() is only looking at the kmap() address range which may > cause check_heap_object() to miss checking an overflow on a > kmap_local_page() page. > > Add a check for the kmap_local_page() address range to is_kmap_addr(). Acked-by: Andrew Morton