linux-kernel - [PATCH v9 09/25] security: Align inode

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Message-Id: <20240115181809.885385-10-roberto.sassu@huaweicloud.com>
Date: Mon, 15 Jan 2024 19:17:53 +0100
From: Roberto Sassu <roberto.sassu@...weicloud.com>
To: viro@...iv.linux.org.uk,
	brauner@...nel.org,
	chuck.lever@...cle.com,
	jlayton@...nel.org,
	neilb@...e.de,
	kolga@...app.com,
	Dai.Ngo@...cle.com,
	tom@...pey.com,
	paul@...l-moore.com,
	jmorris@...ei.org,
	serge@...lyn.com,
	zohar@...ux.ibm.com,
	dmitry.kasatkin@...il.com,
	eric.snowberg@...cle.com,
	dhowells@...hat.com,
	jarkko@...nel.org,
	stephen.smalley.work@...il.com,
	eparis@...isplace.org,
	casey@...aufler-ca.com,
	shuah@...nel.org,
	mic@...ikod.net
Cc: linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	linux-nfs@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-integrity@...r.kernel.org,
	keyrings@...r.kernel.org,
	selinux@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Roberto Sassu <roberto.sassu@...wei.com>,
	Stefan Berger <stefanb@...ux.ibm.com>
Subject: [PATCH v9 09/25] security: Align inode_setattr hook definition with EVM

From: Roberto Sassu <roberto.sassu@...wei.com>

Add the idmap parameter to the definition, so that evm_inode_setattr() can
be registered as this hook implementation.

Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>
Acked-by: Casey Schaufler <casey@...aufler-ca.com>
Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>
---
 include/linux/lsm_hook_defs.h | 3 ++-
 security/security.c           | 2 +-
 security/selinux/hooks.c      | 3 ++-
 security/smack/smack_lsm.c    | 4 +++-
 4 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index 185924c56378..a843bb5f6f4b 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -135,7 +135,8 @@ LSM_HOOK(int, 0, inode_readlink, struct dentry *dentry)
 LSM_HOOK(int, 0, inode_follow_link, struct dentry *dentry, struct inode *inode,
 	 bool rcu)
 LSM_HOOK(int, 0, inode_permission, struct inode *inode, int mask)
-LSM_HOOK(int, 0, inode_setattr, struct dentry *dentry, struct iattr *attr)
+LSM_HOOK(int, 0, inode_setattr, struct mnt_idmap *idmap, struct dentry *dentry,
+	 struct iattr *attr)
 LSM_HOOK(int, 0, inode_getattr, const struct path *path)
 LSM_HOOK(int, 0, inode_setxattr, struct mnt_idmap *idmap,
 	 struct dentry *dentry, const char *name, const void *value,
diff --git a/security/security.c b/security/security.c
index ab847af2c74d..1d332e294704 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2215,7 +2215,7 @@ int security_inode_setattr(struct mnt_idmap *idmap,
 
 	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 		return 0;
-	ret = call_int_hook(inode_setattr, 0, dentry, attr);
+	ret = call_int_hook(inode_setattr, 0, idmap, dentry, attr);
 	if (ret)
 		return ret;
 	return evm_inode_setattr(idmap, dentry, attr);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 179540441115..dae53d7778bb 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3128,7 +3128,8 @@ static int selinux_inode_permission(struct inode *inode, int mask)
 	return rc;
 }
 
-static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
+static int selinux_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
+				 struct iattr *iattr)
 {
 	const struct cred *cred = current_cred();
 	struct inode *inode = d_backing_inode(dentry);
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index c126f6a16de4..9b75216d4a58 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1232,12 +1232,14 @@ static int smack_inode_permission(struct inode *inode, int mask)
 
 /**
  * smack_inode_setattr - Smack check for setting attributes
+ * @idmap: idmap of the mount
  * @dentry: the object
  * @iattr: for the force flag
  *
  * Returns 0 if access is permitted, an error code otherwise
  */
-static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr)
+static int smack_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
+			       struct iattr *iattr)
 {
 	struct smk_audit_info ad;
 	int rc;
-- 
2.34.1