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 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 6/19/2025 2:43 PM, Vlastimil Babka wrote: > On 6/19/25 09:31, Shivank Garg wrote: >> Export anon_inode_make_secure_inode() to allow KVM guest_memfd to create >> anonymous inodes with proper security context. This replaces the current >> pattern of calling alloc_anon_inode() followed by >> inode_init_security_anon() for creating security context manually. >> >> This change also fixes a security regression in secretmem where the >> S_PRIVATE flag was not cleared after alloc_anon_inode(), causing >> LSM/SELinux checks to be bypassed for secretmem file descriptors. >> >> As guest_memfd currently resides in the KVM module, we need to export this > > Could we use the new EXPORT_SYMBOL_GPL_FOR_MODULES() thingy to make this > explicit for KVM? > Thanks for the suggestion. I wasn't aware of this earlier. I think it makes sense to use it now. So, the code would look like this: +EXPORT_SYMBOL_GPL_FOR_MODULES(anon_inode_make_secure_inode, "kvm"); which builds fine for me. I hope this is the correct usage. Thanks, Shivank