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b=P+EsTW84x8keIwUTvkRWbYosyLbTo2I6umG0mVCEyDCeegk2KQjQyHtZQ5oRJnCgC yNChtyIr674JyBKPoJLDWldDB/JdJIF8/xB47vAIPHom3J84T5GThkEvHsFZ4Hjypu 1VcI5yKbK2uR84tBs9yULm2AzxBuYopTCT5V6Bwp0yFQheF7v6iDaO7wkzApOXScgX tLgEDapvz5RnDH8MTiauHNSr5eqbVgxisHp1FGdWFzpOX5XUyBGrTC0Frrzt4g44FB PkcWEWKdmOeMWtY2aKQvIPl0j1H2btJPIHtSNdxp0QtQ7zDPizKXLPL0j4dcGXfaqG 76ewPadvNMJKQ== Date: Tue, 17 Dec 2024 21:13:29 -0800 From: Kees Cook To: Hajime Tazaki Cc: linux-um@lists.infradead.org, ricarkol@google.com, Liam.Howlett@oracle.com, Eric Biederman , Alexander Viro , Christian Brauner , Jan Kara , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH v5 02/13] x86/um: nommu: elf loader for fdpic Message-ID: <202412172113.21E002F0@keescook> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 8806A1C000F X-Rspamd-Server: rspam12 X-Stat-Signature: jrhaxjtm8kcotn3rbpfokywyka3bbomr X-Rspam-User: X-HE-Tag: 1734498780-843354 X-HE-Meta: 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 3uywDstr lqtniJMY71irF81O0DgmVKWiaBPTSfvd+qOvi4x0jwVHt8pFTOLMq/0ucloLljRlC6SbyA3fwMiO2603Spy2MK0hKTY9cTXAgCCmqtCVArdmq1Rz3hf8Ppo4apVc+1MvKXCEqo6Wie3YVfeXwQPyiKr6gkMo93Q2FBpLl3twGWcJ4VgwukXZU3zhSnahKuqTxzKLFHDbde/5pClAj+CLsp41pWlQ5UpCeCiJxItgY4Ohys+2SAFb3Mx4zur6KVVpMwzgwIRlj6ObB8Xw2wAa8Hq85Hc+X/HvNb3FtNa3k8Rxw46flPu0USNxV5hH8oEq71gV3lmEcNmO5zFAzNt1/FrCZJDtIQDzM1nBWT7i9m4d54JvD6n0dK3b4k7RdHoko8eskH1hUqFls+lMdc0Wb+RYPmQSKuuTxM/SftMdthhnBDrfdx0r0CktLZs1kwvav/ujNeZ+CgqxJ5bJYfLmVL5AuKCXYHAoRI0LK 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: List-Subscribe: List-Unsubscribe: On Thu, Dec 12, 2024 at 07:12:09PM +0900, Hajime Tazaki wrote: > As UML supports CONFIG_MMU=n case, it has to use an alternate ELF > loader, FDPIC ELF loader. In this commit, we added necessary > definitions in the arch, as UML has not been used so far. It also > updates Kconfig file to use BINFMT_ELF_FDPIC under !MMU environment. > > Cc: Eric Biederman > Cc: Kees Cook > Cc: Alexander Viro > Cc: Christian Brauner > Cc: Jan Kara > Cc: linux-mm@kvack.org > Cc: linux-fsdevel@vger.kernel.org > Signed-off-by: Hajime Tazaki Acked-by: Kees Cook -- Kees Cook