linux-kernel - [PATCH v4 01/23] ima: Align ima_inode_post_setattr() definition with LSM infrastructure

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Date:   Fri, 27 Oct 2023 10:35:36 +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 01/23] ima: Align ima_inode_post_setattr() definition with LSM infrastructure

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

Change ima_inode_post_setattr() definition, so that it can be registered as
implementation of the inode_post_setattr hook (to be introduced).

Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>
---
 fs/attr.c                             | 2 +-
 include/linux/ima.h                   | 4 ++--
 security/integrity/ima/ima_appraise.c | 3 ++-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/fs/attr.c b/fs/attr.c
index a8ae5f6d9b16..bb658937f16a 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -502,7 +502,7 @@ int notify_change(struct mnt_idmap *idmap, struct dentry *dentry,
 
 	if (!error) {
 		fsnotify_change(dentry, ia_valid);
-		ima_inode_post_setattr(idmap, dentry);
+		ima_inode_post_setattr(idmap, dentry, ia_valid);
 		evm_inode_post_setattr(dentry, ia_valid);
 	}
 
diff --git a/include/linux/ima.h b/include/linux/ima.h
index 86b57757c7b1..910a2f11a906 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -186,7 +186,7 @@ static inline void ima_post_key_create_or_update(struct key *keyring,
 #ifdef CONFIG_IMA_APPRAISE
 extern bool is_ima_appraise_enabled(void);
 extern void ima_inode_post_setattr(struct mnt_idmap *idmap,
-				   struct dentry *dentry);
+				   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_set_acl(struct mnt_idmap *idmap,
@@ -206,7 +206,7 @@ static inline bool is_ima_appraise_enabled(void)
 }
 
 static inline void ima_inode_post_setattr(struct mnt_idmap *idmap,
-					  struct dentry *dentry)
+					  struct dentry *dentry, int ia_valid)
 {
 	return;
 }
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 870dde67707b..36c2938a5c69 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -629,6 +629,7 @@ void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file)
  * ima_inode_post_setattr - reflect file metadata changes
  * @idmap:  idmap of the mount the inode was found from
  * @dentry: pointer to the affected dentry
+ * @ia_valid: for the UID and GID status
  *
  * Changes to a dentry's metadata might result in needing to appraise.
  *
@@ -636,7 +637,7 @@ void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file)
  * to lock the inode's i_mutex.
  */
 void ima_inode_post_setattr(struct mnt_idmap *idmap,
-			    struct dentry *dentry)
+			    struct dentry *dentry, int ia_valid)
 {
 	struct inode *inode = d_backing_inode(dentry);
 	struct integrity_iint_cache *iint;
-- 
2.34.1