[v9,07/25] evm: Align evm_inode_setxattr() definition with LSM infrastructure

Commit Message

Roberto Sassu Jan. 15, 2024, 6:17 p.m. UTC

From: Roberto Sassu <[e-mail]>

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

Signed-off-by: Roberto Sassu <[e-mail]>
Reviewed-by: Stefan Berger <[e-mail]>
Reviewed-by: Mimi Zohar <[e-mail]>
Reviewed-by: Casey Schaufler <[e-mail]>
---
 include/linux/evm.h               | 4 ++--
 security/integrity/evm/evm_main.c | 3 ++-
 security/security.c               | 2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)

Comments

Paul Moore Feb. 8, 2024, 3:18 a.m. UTC | #1

On Jan 15, 2024 Roberto Sassu <[e-mail]> wrote:
> 
> Change evm_inode_setxattr() definition, so that it can be registered as
> implementation of the inode_setxattr hook.
> 
> Signed-off-by: Roberto Sassu <[e-mail]>
> Reviewed-by: Stefan Berger <[e-mail]>
> Reviewed-by: Mimi Zohar <[e-mail]>
> Reviewed-by: Casey Schaufler <[e-mail]>
> ---
>  include/linux/evm.h               | 4 ++--
>  security/integrity/evm/evm_main.c | 3 ++-
>  security/security.c               | 2 +-
>  3 files changed, 5 insertions(+), 4 deletions(-)

Acked-by: Paul Moore <[e-mail]>

--
paul-moore.com

Patch

diff --git a/include/linux/evm.h b/include/linux/evm.h
index 5cc386312b5a..7de24c1ada90 100644
--- a/include/linux/evm.h
+++ b/include/linux/evm.h
@@ -27,7 +27,7 @@  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);
+			      const void *value, size_t size, int flags);
 extern void evm_inode_post_setxattr(struct dentry *dentry,
 				    const char *xattr_name,
 				    const void *xattr_value,
@@ -107,7 +107,7 @@  static inline void evm_inode_post_setattr(struct mnt_idmap *idmap,
 
 static inline int evm_inode_setxattr(struct mnt_idmap *idmap,
 				     struct dentry *dentry, const char *name,
-				     const void *value, size_t size)
+				     const void *value, size_t size, int flags)
 {
 	return 0;
 }
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index ac34f21122cd..12ba3207fd31 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -581,6 +581,7 @@  static int evm_protect_xattr(struct mnt_idmap *idmap,
  * @xattr_name: pointer to the affected extended attribute name
  * @xattr_value: pointer to the new extended attribute value
  * @xattr_value_len: pointer to the new extended attribute value length
+ * @flags: flags to pass into filesystem operations
  *
  * Before allowing the 'security.evm' protected xattr to be updated,
  * verify the existing value is valid.  As only the kernel should have
@@ -590,7 +591,7 @@  static int evm_protect_xattr(struct mnt_idmap *idmap,
  */
 int evm_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)
 {
 	const struct evm_ima_xattr_data *xattr_data = xattr_value;
 
diff --git a/security/security.c b/security/security.c
index fda78023de48..f0d1f8f0da80 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2272,7 +2272,7 @@  int security_inode_setxattr(struct mnt_idmap *idmap,
 	ret = ima_inode_setxattr(idmap, dentry, name, value, size, flags);
 	if (ret)
 		return ret;
-	return evm_inode_setxattr(idmap, dentry, name, value, size);
+	return evm_inode_setxattr(idmap, dentry, name, value, size, flags);
 }
 
 /**