linux-kernel - [PATCH 08/28] evm: Align evm_inode_post_setattr() definition with LSM infrastructure

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Date:   Fri,  3 Mar 2023 19:18:22 +0100
From:   Roberto Sassu <roberto.sassu@...weicloud.com>
To:     viro@...iv.linux.org.uk, chuck.lever@...cle.com,
        jlayton@...nel.org, zohar@...ux.ibm.com, dmitry.kasatkin@...il.com,
        paul@...l-moore.com, jmorris@...ei.org, serge@...lyn.com,
        dhowells@...hat.com, jarkko@...nel.org,
        stephen.smalley.work@...il.com, eparis@...isplace.org,
        casey@...aufler-ca.com, brauner@...nel.org
Cc:     linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, keyrings@...r.kernel.org,
        selinux@...r.kernel.org, linux-kernel@...r.kernel.org,
        stefanb@...ux.ibm.com, Roberto Sassu <roberto.sassu@...wei.com>
Subject: [PATCH 08/28] evm: Align evm_inode_post_setattr() definition with LSM infrastructure

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

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

Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
---
 fs/attr.c                         | 2 +-
 include/linux/evm.h               | 6 ++++--
 security/integrity/evm/evm_main.c | 4 +++-
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/fs/attr.c b/fs/attr.c
index 5050ab4cc45..da45cf01be6 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -486,7 +486,7 @@ int notify_change(struct mnt_idmap *idmap, struct dentry *dentry,
 	if (!error) {
 		fsnotify_change(dentry, ia_valid);
 		ima_inode_post_setattr(idmap, dentry, ia_valid);
-		evm_inode_post_setattr(dentry, ia_valid);
+		evm_inode_post_setattr(idmap, dentry, ia_valid);
 	}
 
 	return error;
diff --git a/include/linux/evm.h b/include/linux/evm.h
index cc64cea354e..b41f98791a7 100644
--- a/include/linux/evm.h
+++ b/include/linux/evm.h
@@ -23,7 +23,8 @@ extern enum integrity_status evm_verifyxattr(struct dentry *dentry,
 					     struct integrity_iint_cache *iint);
 extern int evm_inode_setattr(struct mnt_idmap *idmap,
 			     struct dentry *dentry, struct iattr *attr);
-extern void evm_inode_post_setattr(struct dentry *dentry, int ia_valid);
+extern void evm_inode_post_setattr(struct mnt_idmap *idmap,
+				   struct dentry *dentry, int ia_valid);
 extern int evm_inode_setxattr(struct mnt_idmap *idmap,
 			      struct dentry *dentry, const char *name,
 			      const void *value, size_t size);
@@ -96,7 +97,8 @@ static inline int evm_inode_setattr(struct mnt_idmap *idmap,
 	return 0;
 }
 
-static inline void evm_inode_post_setattr(struct dentry *dentry, int ia_valid)
+static inline void evm_inode_post_setattr(struct mnt_idmap *idmap,
+					  struct dentry *dentry, int ia_valid)
 {
 	return;
 }
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index 40cfe0d16c8..0cb63dfc998 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -838,6 +838,7 @@ int evm_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 
 /**
  * evm_inode_post_setattr - update 'security.evm' after modifying metadata
+ * @idmap: idmap of the idmapped mount
  * @dentry: pointer to the affected dentry
  * @ia_valid: for the UID and GID status
  *
@@ -847,7 +848,8 @@ int evm_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
  * This function is called from notify_change(), which expects the caller
  * to lock the inode's i_mutex.
  */
-void evm_inode_post_setattr(struct dentry *dentry, int ia_valid)
+void evm_inode_post_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
+			    int ia_valid)
 {
 	if (!evm_revalidate_status(NULL))
 		return;
-- 
2.25.1