linux-kernel - [PATCH RFC v7 3/8] security: Export security_inode_init_security_anon for KVM guest

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Message-ID: <20250408112402.181574-4-shivankg@amd.com>
Date: Tue, 8 Apr 2025 11:23:57 +0000
From: Shivank Garg <shivankg@....com>
To: <seanjc@...gle.com>, <david@...hat.com>, <vbabka@...e.cz>,
	<willy@...radead.org>, <akpm@...ux-foundation.org>, <shuah@...nel.org>,
	<pbonzini@...hat.com>
CC: <ackerleytng@...gle.com>, <paul@...l-moore.com>, <jmorris@...ei.org>,
	<serge@...lyn.com>, <pvorel@...e.cz>, <bfoster@...hat.com>,
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	<kalyazin@...zon.com>, <peterx@...hat.com>, <shivankg@....com>,
	<linux-fsdevel@...r.kernel.org>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, <linux-security-module@...r.kernel.org>,
	<kvm@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
	<linux-coco@...ts.linux.dev>
Subject: [PATCH RFC v7 3/8] security: Export security_inode_init_security_anon for KVM guest_memfd

KVM guest_memfd is implementing its own inodes to store metadata for
backing memory using a custom filesystem. This requires the ability to
initialize anonymous inode using security_inode_init_security_anon().

As guest_memfd currently resides in the KVM module, we need to export this
symbol for use outside the core kernel. In the future, guest_memfd might be
moved to core-mm, at which point the symbols no longer would have to be
exported. When/if that happens is still unclear.

Signed-off-by: Shivank Garg <shivankg@....com>
---
 security/security.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/security/security.c b/security/security.c
index fb57e8fddd91..097283bb06a5 100644
--- a/security/security.c
+++ b/security/security.c
@@ -1877,6 +1877,7 @@ int security_inode_init_security_anon(struct inode *inode,
 	return call_int_hook(inode_init_security_anon, inode, name,
 			     context_inode);
 }
+EXPORT_SYMBOL(security_inode_init_security_anon);
 
 #ifdef CONFIG_SECURITY_PATH
 /**
-- 
2.34.1