2023-03-03 18:37:42

by Roberto Sassu

Subject: [PATCH 10/28] evm: Align evm_inode_post_setxattr() definition with LSM infrastructure

From: Roberto Sassu <[email protected]>

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

Signed-off-by: Roberto Sassu <[email protected]>
---
include/linux/evm.h | 8 +++++---
security/integrity/evm/evm_main.c | 4 +++-
security/security.c | 2 +-
3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/include/linux/evm.h b/include/linux/evm.h
index 2f8c5a3983f..8c043273552 100644
--- a/include/linux/evm.h
+++ b/include/linux/evm.h
@@ -31,7 +31,8 @@ extern int evm_inode_setxattr(struct mnt_idmap *idmap,
extern void evm_inode_post_setxattr(struct dentry *dentry,
const char *xattr_name,
const void *xattr_value,
- size_t xattr_value_len);
+ size_t xattr_value_len,
+ int flags);
extern int evm_inode_removexattr(struct mnt_idmap *idmap,
struct dentry *dentry, const char *xattr_name);
extern void evm_inode_post_removexattr(struct dentry *dentry,
@@ -55,7 +56,7 @@ static inline void evm_inode_post_set_acl(struct dentry *dentry,
const char *acl_name,
struct posix_acl *kacl)
{
- return evm_inode_post_setxattr(dentry, acl_name, NULL, 0);
+ return evm_inode_post_setxattr(dentry, acl_name, NULL, 0, 0);
}
extern int evm_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr,
@@ -113,7 +114,8 @@ static inline int evm_inode_setxattr(struct mnt_idmap *idmap,
static inline void evm_inode_post_setxattr(struct dentry *dentry,
const char *xattr_name,
const void *xattr_value,
- size_t xattr_value_len)
+ size_t xattr_value_len,
+ int flags)
{
return;
}
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index c884534f3b7..1155a58ae87 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -730,6 +730,7 @@ bool evm_revalidate_status(const char *xattr_name)
* @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
*
* Update the HMAC stored in 'security.evm' to reflect the change.
*
@@ -738,7 +739,8 @@ bool evm_revalidate_status(const char *xattr_name)
* i_mutex lock.
*/
void evm_inode_post_setxattr(struct dentry *dentry, const char *xattr_name,
- const void *xattr_value, size_t xattr_value_len)
+ const void *xattr_value, size_t xattr_value_len,
+ int flags)
{
if (!evm_revalidate_status(xattr_name))
return;
diff --git a/security/security.c b/security/security.c
index dcb98901eb9..df6714aa19d 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2319,7 +2319,7 @@ void security_inode_post_setxattr(struct dentry *dentry, const char *name,
if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
return;
call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
- evm_inode_post_setxattr(dentry, name, value, size);
+ evm_inode_post_setxattr(dentry, name, value, size, flags);
}

/**
--
2.25.1

2023-03-06 17:04:13

by Stefan Berger

Subject: Re: [PATCH 10/28] evm: Align evm_inode_post_setxattr() definition with LSM infrastructure

On 3/3/23 13:18, Roberto Sassu wrote:
> From: Roberto Sassu <[email protected]>
>
> Change evm_inode_post_setxattr() definition, so that it can be registered
> as implementation of the inode_post_setxattr hook.
>
> Signed-off-by: Roberto Sassu <[email protected]>

Reviewed-by: Stefan Berger <[email protected]>