linux-kernel - [PATCH v4 03/23] ima: Align ima_inode_setxattr() definition with LSM infrastructure

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Date:   Fri, 27 Oct 2023 10:35:38 +0200
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,
        dhowells@...hat.com, jarkko@...nel.org,
        stephen.smalley.work@...il.com, eparis@...isplace.org,
        casey@...aufler-ca.com, mic@...ikod.net
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...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, Roberto Sassu <roberto.sassu@...wei.com>,
        Stefan Berger <stefanb@...ux.ibm.com>
Subject: [PATCH v4 03/23] ima: Align ima_inode_setxattr() definition with LSM infrastructure

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

Change ima_inode_setxattr() definition, so that it can be registered as
implementation of the inode_setxattr hook.

Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>
Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>
---
 include/linux/ima.h                   | 11 +++++++----
 security/integrity/ima/ima_appraise.c |  5 +++--
 security/security.c                   |  2 +-
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/include/linux/ima.h b/include/linux/ima.h
index b66353f679e8..077324309c11 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -188,8 +188,9 @@ static inline void ima_post_key_create_or_update(struct key *keyring,
 extern bool is_ima_appraise_enabled(void);
 extern void ima_inode_post_setattr(struct mnt_idmap *idmap,
 				   struct dentry *dentry, int ia_valid);
-extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
-		       const void *xattr_value, size_t xattr_value_len);
+extern int ima_inode_setxattr(struct mnt_idmap *idmap, struct dentry *dentry,
+			      const char *xattr_name, const void *xattr_value,
+			      size_t xattr_value_len, int flags);
 extern int ima_inode_set_acl(struct mnt_idmap *idmap,
 			     struct dentry *dentry, const char *acl_name,
 			     struct posix_acl *kacl);
@@ -212,10 +213,12 @@ static inline void ima_inode_post_setattr(struct mnt_idmap *idmap,
 	return;
 }
 
-static inline int ima_inode_setxattr(struct dentry *dentry,
+static inline int ima_inode_setxattr(struct mnt_idmap *idmap,
+				     struct dentry *dentry,
 				     const char *xattr_name,
 				     const void *xattr_value,
-				     size_t xattr_value_len)
+				     size_t xattr_value_len,
+				     int flags)
 {
 	return 0;
 }
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 36c2938a5c69..cb2d0d11aa77 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -750,8 +750,9 @@ static int validate_hash_algo(struct dentry *dentry,
 	return -EACCES;
 }
 
-int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
-		       const void *xattr_value, size_t xattr_value_len)
+int ima_inode_setxattr(struct mnt_idmap *idmap, struct dentry *dentry,
+		       const char *xattr_name, const void *xattr_value,
+		       size_t xattr_value_len, int flags)
 {
 	const struct evm_ima_xattr_data *xvalue = xattr_value;
 	int digsig = 0;
diff --git a/security/security.c b/security/security.c
index 37f5b3c12f3d..ac1157edc0e2 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2262,7 +2262,7 @@ int security_inode_setxattr(struct mnt_idmap *idmap,
 		ret = cap_inode_setxattr(dentry, name, value, size, flags);
 	if (ret)
 		return ret;
-	ret = ima_inode_setxattr(dentry, name, value, size);
+	ret = ima_inode_setxattr(idmap, dentry, name, value, size, flags);
 	if (ret)
 		return ret;
 	return evm_inode_setxattr(idmap, dentry, name, value, size);
-- 
2.34.1