[AppArmor 22/47] Pass struct vfsmount to the inode_setxattr LSM hook
From: John
Date: Thu Dec 20 2007 - 09:21:51 EST
This is needed for computing pathnames in the AppArmor LSM.
Signed-off-by: Tony Jones <tonyj@xxxxxxx>
Signed-off-by: Andreas Gruenbacher <agruen@xxxxxxx>
Signed-off-by: John Johansen <jjohansen@xxxxxxx>
---
fs/xattr.c | 4 ++--
include/linux/security.h | 35 +++++++++++++++++++++--------------
security/commoncap.c | 4 ++--
security/dummy.c | 9 ++++++---
security/security.c | 14 ++++++++------
security/selinux/hooks.c | 8 ++++++--
6 files changed, 45 insertions(+), 29 deletions(-)
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -78,7 +78,7 @@ vfs_setxattr(struct dentry *dentry, stru
return error;
mutex_lock(&inode->i_mutex);
- error = security_inode_setxattr(dentry, name, value, size, flags);
+ error = security_inode_setxattr(dentry, mnt, name, value, size, flags);
if (error)
goto out;
error = -EOPNOTSUPP;
@@ -86,7 +86,7 @@ vfs_setxattr(struct dentry *dentry, stru
error = inode->i_op->setxattr(dentry, name, value, size, flags);
if (!error) {
fsnotify_xattr(dentry);
- security_inode_post_setxattr(dentry, name, value,
+ security_inode_post_setxattr(dentry, mnt, name, value,
size, flags);
}
} else if (!strncmp(name, XATTR_SECURITY_PREFIX,
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -57,7 +57,7 @@ extern void cap_capset_set (struct task_
extern int cap_bprm_set_security (struct linux_binprm *bprm);
extern void cap_bprm_apply_creds (struct linux_binprm *bprm, int unsafe);
extern int cap_bprm_secureexec(struct linux_binprm *bprm);
-extern int cap_inode_setxattr(struct dentry *dentry, char *name, void *value, size_t size, int flags);
+extern int cap_inode_setxattr(struct dentry *dentry, struct vfsmount *mnt, char *name, void *value, size_t size, int flags);
extern int cap_inode_removexattr(struct dentry *dentry, char *name);
extern int cap_inode_need_killpriv(struct dentry *dentry);
extern int cap_inode_killpriv(struct dentry *dentry);
@@ -415,11 +415,11 @@ struct request_sock;
* inode.
* @inode_setxattr:
* Check permission before setting the extended attributes
- * @value identified by @name for @dentry.
+ * @value identified by @name for @dentry and @mnt.
* Return 0 if permission is granted.
* @inode_post_setxattr:
* Update inode security field after successful setxattr operation.
- * @value identified by @name for @dentry.
+ * @value identified by @name for @dentry and @mnt.
* @inode_getxattr:
* Check permission before obtaining the extended attributes
* identified by @name for @dentry.
@@ -1310,9 +1310,11 @@ struct security_operations {
struct iattr *attr);
int (*inode_getattr) (struct vfsmount *mnt, struct dentry *dentry);
void (*inode_delete) (struct inode *inode);
- int (*inode_setxattr) (struct dentry *dentry, char *name, void *value,
- size_t size, int flags);
- void (*inode_post_setxattr) (struct dentry *dentry, char *name, void *value,
+ int (*inode_setxattr) (struct dentry *dentry, struct vfsmount *mnt,
+ char *name, void *value, size_t size, int flags);
+ void (*inode_post_setxattr) (struct dentry *dentry,
+ struct vfsmount *mnt,
+ char *name, void *value,
size_t size, int flags);
int (*inode_getxattr) (struct dentry *dentry, char *name);
int (*inode_listxattr) (struct dentry *dentry);
@@ -1580,10 +1582,11 @@ int security_inode_setattr(struct dentry
struct iattr *attr);
int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry);
void security_inode_delete(struct inode *inode);
-int security_inode_setxattr(struct dentry *dentry, char *name,
- void *value, size_t size, int flags);
-void security_inode_post_setxattr(struct dentry *dentry, char *name,
- void *value, size_t size, int flags);
+int security_inode_setxattr(struct dentry *dentry, struct vfsmount *mnt,
+ char *name, void *value, size_t size, int flags);
+void security_inode_post_setxattr(struct dentry *dentry, struct vfsmount *mnt,
+ char *name, void *value, size_t size,
+ int flags);
int security_inode_getxattr(struct dentry *dentry, char *name);
int security_inode_listxattr(struct dentry *dentry);
int security_inode_removexattr(struct dentry *dentry, char *name);
@@ -1971,14 +1974,18 @@ static inline int security_inode_getattr
static inline void security_inode_delete (struct inode *inode)
{ }
-static inline int security_inode_setxattr (struct dentry *dentry, char *name,
+static inline int security_inode_setxattr (struct dentry *dentry,
+ struct vfsmount *mnt, char *name,
void *value, size_t size, int flags)
{
- return cap_inode_setxattr(dentry, name, value, size, flags);
+ return cap_inode_setxattr(dentry, mnt, name, value, size, flags);
}
-static inline void security_inode_post_setxattr (struct dentry *dentry, char *name,
- void *value, size_t size, int flags)
+static inline void security_inode_post_setxattr (struct dentry *dentry,
+ struct vfsmount *mnt,
+ char *name,
+ void *value, size_t size,
+ int flags)
{ }
static inline int security_inode_getxattr (struct dentry *dentry, char *name)
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -379,8 +379,8 @@ int cap_bprm_secureexec (struct linux_bi
current->egid != current->gid);
}
-int cap_inode_setxattr(struct dentry *dentry, char *name, void *value,
- size_t size, int flags)
+int cap_inode_setxattr(struct dentry *dentry, struct vfsmount *mnt, char *name,
+ void *value, size_t size, int flags)
{
if (!strcmp(name, XATTR_NAME_CAPS)) {
if (!capable(CAP_SETFCAP))
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -375,8 +375,9 @@ static void dummy_inode_delete (struct i
return;
}
-static int dummy_inode_setxattr (struct dentry *dentry, char *name, void *value,
- size_t size, int flags)
+static int dummy_inode_setxattr (struct dentry *dentry, struct vfsmount *mnt,
+ char *name, void *value, size_t size,
+ int flags)
{
if (!strncmp(name, XATTR_SECURITY_PREFIX,
sizeof(XATTR_SECURITY_PREFIX) - 1) &&
@@ -385,7 +386,9 @@ static int dummy_inode_setxattr (struct
return 0;
}
-static void dummy_inode_post_setxattr (struct dentry *dentry, char *name, void *value,
+static void dummy_inode_post_setxattr (struct dentry *dentry,
+ struct vfsmount *mnt,
+ char *name, void *value,
size_t size, int flags)
{
}
--- a/security/security.c
+++ b/security/security.c
@@ -460,20 +460,22 @@ void security_inode_delete(struct inode
security_ops->inode_delete(inode);
}
-int security_inode_setxattr(struct dentry *dentry, char *name,
- void *value, size_t size, int flags)
+int security_inode_setxattr(struct dentry *dentry, struct vfsmount *mnt,
+ char *name, void *value, size_t size, int flags)
{
if (unlikely(IS_PRIVATE(dentry->d_inode)))
return 0;
- return security_ops->inode_setxattr(dentry, name, value, size, flags);
+ return security_ops->inode_setxattr(dentry, mnt, name, value, size,
+ flags);
}
-void security_inode_post_setxattr(struct dentry *dentry, char *name,
- void *value, size_t size, int flags)
+void security_inode_post_setxattr(struct dentry *dentry, struct vfsmount *mnt,
+ char *name, void *value, size_t size,
+ int flags)
{
if (unlikely(IS_PRIVATE(dentry->d_inode)))
return;
- security_ops->inode_post_setxattr(dentry, name, value, size, flags);
+ security_ops->inode_post_setxattr(dentry, mnt, name, value, size, flags);
}
int security_inode_getxattr(struct dentry *dentry, char *name)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2559,7 +2559,9 @@ static int selinux_inode_setotherxattr(s
return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
}
-static int selinux_inode_setxattr(struct dentry *dentry, char *name, void *value, size_t size, int flags)
+static int selinux_inode_setxattr(struct dentry *dentry, struct vfsmount *mnt,
+ char *name, void *value, size_t size,
+ int flags)
{
struct task_security_struct *tsec = current->security;
struct inode *inode = dentry->d_inode;
@@ -2608,7 +2610,9 @@ static int selinux_inode_setxattr(struct
&ad);
}
-static void selinux_inode_post_setxattr(struct dentry *dentry, char *name,
+static void selinux_inode_post_setxattr(struct dentry *dentry,
+ struct vfsmount *mnt,
+ char *name,
void *value, size_t size, int flags)
{
struct inode *inode = dentry->d_inode;
--
--
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