From: John@suse.de, Johansen@suse.de
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, Tony Jones <tonyj@suse.de>,
Andreas Gruenbacher <agruen@suse.de>,
John Johansen <jjohansen@suse.de>
Subject: [AppArmor 13/47] Pass the struct vfsmounts to the inode_link LSM hook
Date: Thu, 20 Dec 2007 06:09:23 -0800 [thread overview]
Message-ID: <20071220140943.294302058@suse.de> (raw)
In-Reply-To: 20071220140910.934607826@suse.de
[-- Attachment #1: security-link.diff --]
[-- Type: text/plain, Size: 5085 bytes --]
This is needed for computing pathnames in the AppArmor LSM.
Signed-off-by: Tony Jones <tonyj@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: John Johansen <jjohansen@suse.de>
---
fs/namei.c | 3 ++-
include/linux/security.h | 16 +++++++++++-----
security/dummy.c | 6 ++++--
security/security.c | 8 +++++---
security/selinux/hooks.c | 9 +++++++--
5 files changed, 29 insertions(+), 13 deletions(-)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2486,7 +2486,8 @@ int vfs_link(struct dentry *old_dentry,
if (S_ISDIR(old_dentry->d_inode->i_mode))
return -EPERM;
- error = security_inode_link(old_dentry, dir, new_dentry);
+ error = security_inode_link(old_dentry, old_mnt, dir, new_dentry,
+ new_mnt);
if (error)
return error;
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -320,8 +320,10 @@ struct request_sock;
* @inode_link:
* Check permission before creating a new hard link to a file.
* @old_dentry contains the dentry structure for an existing link to the file.
+ * @old_mnt is the vfsmount corresponding to @old_dentry (may be NULL).
* @dir contains the inode structure of the parent directory of the new link.
* @new_dentry contains the dentry structure for the new link.
+ * @new_mnt is the vfsmount corresponding to @new_dentry (may be NULL).
* Return 0 if permission is granted.
* @inode_unlink:
* Check the permission to remove a hard link to a file.
@@ -1280,8 +1282,9 @@ struct security_operations {
char **name, void **value, size_t *len);
int (*inode_create) (struct inode *dir, struct dentry *dentry,
struct vfsmount *mnt, int mode);
- int (*inode_link) (struct dentry *old_dentry,
- struct inode *dir, struct dentry *new_dentry);
+ int (*inode_link) (struct dentry *old_dentry, struct vfsmount *old_mnt,
+ struct inode *dir, struct dentry *new_dentry,
+ struct vfsmount *new_mnt);
int (*inode_unlink) (struct inode *dir, struct dentry *dentry);
int (*inode_symlink) (struct inode *dir, struct dentry *dentry,
struct vfsmount *mnt, const char *old_name);
@@ -1546,8 +1549,9 @@ int security_inode_init_security(struct
char **name, void **value, size_t *len);
int security_inode_create(struct inode *dir, struct dentry *dentry,
struct vfsmount *mnt, int mode);
-int security_inode_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *new_dentry);
+int security_inode_link(struct dentry *old_dentry, struct vfsmount *old_mnt,
+ struct inode *dir, struct dentry *new_dentry,
+ struct vfsmount *new_mnt);
int security_inode_unlink(struct inode *dir, struct dentry *dentry);
int security_inode_symlink(struct inode *dir, struct dentry *dentry,
struct vfsmount *mnt, const char *old_name);
@@ -1866,8 +1870,10 @@ static inline int security_inode_create
}
static inline int security_inode_link (struct dentry *old_dentry,
+ struct vfsmount *old_mnt,
struct inode *dir,
- struct dentry *new_dentry)
+ struct dentry *new_dentry,
+ struct vfsmount *new_mnt)
{
return 0;
}
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -295,8 +295,10 @@ static int dummy_inode_create (struct in
return 0;
}
-static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
- struct dentry *new_dentry)
+static int dummy_inode_link (struct dentry *old_dentry,
+ struct vfsmount *old_mnt, struct inode *inode,
+ struct dentry *new_dentry,
+ struct vfsmount *new_mnt)
{
return 0;
}
--- a/security/security.c
+++ b/security/security.c
@@ -356,12 +356,14 @@ int security_inode_create(struct inode *
return security_ops->inode_create(dir, dentry, mnt, mode);
}
-int security_inode_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *new_dentry)
+int security_inode_link(struct dentry *old_dentry, struct vfsmount *old_mnt,
+ struct inode *dir, struct dentry *new_dentry,
+ struct vfsmount *new_mnt)
{
if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
return 0;
- return security_ops->inode_link(old_dentry, dir, new_dentry);
+ return security_ops->inode_link(old_dentry, old_mnt, dir,
+ new_dentry, new_mnt);
}
int security_inode_unlink(struct inode *dir, struct dentry *dentry)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2417,11 +2417,16 @@ static int selinux_inode_create(struct i
return may_create(dir, dentry, SECCLASS_FILE);
}
-static int selinux_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry)
+static int selinux_inode_link(struct dentry *old_dentry,
+ struct vfsmount *old_mnt,
+ struct inode *dir,
+ struct dentry *new_dentry,
+ struct vfsmount *new_mnt)
{
int rc;
- rc = secondary_ops->inode_link(old_dentry,dir,new_dentry);
+ rc = secondary_ops->inode_link(old_dentry, old_mnt, dir, new_dentry,
+ new_mnt);
if (rc)
return rc;
return may_link(dir, old_dentry, MAY_LINK);
--
next prev parent reply other threads:[~2007-12-20 14:17 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-20 14:09 [AppArmor 00/47] AppArmor security module overview John, Johansen
2007-12-20 14:09 ` [AppArmor 01/47] Pass struct vfsmount to the inode_create LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 02/47] Pass struct path down to remove_suid and children John, Johansen
2007-12-20 14:09 ` [AppArmor 03/47] Add a vfsmount parameter to notify_change() John, Johansen
2007-12-20 14:09 ` [AppArmor 04/47] Pass struct vfsmount to the inode_setattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 05/47] Add struct vfsmount parameter to vfs_mkdir() John, Johansen
2007-12-20 14:09 ` [AppArmor 06/47] Pass struct vfsmount to the inode_mkdir LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 07/47] Add a struct vfsmount parameter to vfs_mknod() John, Johansen
2007-12-20 14:09 ` [AppArmor 08/47] Pass struct vfsmount to the inode_mknod LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 09/47] Add a struct vfsmount parameter to vfs_symlink() John, Johansen
2007-12-20 14:09 ` [AppArmor 10/47] Pass struct vfsmount to the inode_symlink LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 11/47] Pass struct vfsmount to the inode_readlink " John, Johansen
2007-12-20 14:09 ` [AppArmor 12/47] Add struct vfsmount parameters to vfs_link() John, Johansen
2007-12-20 14:09 ` John, Johansen [this message]
2007-12-20 14:09 ` [AppArmor 14/47] Add a struct vfsmount parameter to vfs_rmdir() John, Johansen
2007-12-20 14:09 ` [AppArmor 15/47] Pass struct vfsmount to the inode_rmdir LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 16/47] Call lsm hook before unhashing dentry in vfs_rmdir() John, Johansen
2007-12-20 14:09 ` [AppArmor 17/47] Add a struct vfsmount parameter to vfs_unlink() John, Johansen
2007-12-20 14:09 ` [AppArmor 18/47] Pass struct vfsmount to the inode_unlink LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 19/47] Add struct vfsmount parameters to vfs_rename() John, Johansen
2007-12-20 14:09 ` [AppArmor 20/47] Pass struct vfsmount to the inode_rename LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 21/47] Add a struct vfsmount parameter to vfs_setxattr() John, Johansen
2007-12-20 14:09 ` [AppArmor 22/47] Pass struct vfsmount to the inode_setxattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 23/47] Add a struct vfsmount parameter to vfs_getxattr() John, Johansen
2007-12-20 14:09 ` [AppArmor 24/47] Pass struct vfsmount to the inode_getxattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 25/47] Add a struct vfsmount parameter to vfs_listxattr() John, Johansen
2007-12-20 14:09 ` [AppArmor 26/47] Pass struct vfsmount to the inode_listxattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 27/47] Add a struct vfsmount parameter to vfs_removexattr() John, Johansen
2007-12-20 14:09 ` [AppArmor 28/47] Pass struct vfsmount to the inode_removexattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 29/47] Fix __d_path() for lazy unmounts and make it unambiguous John, Johansen
2007-12-20 14:09 ` [AppArmor 30/47] Make d_path() consistent across mount operations John, Johansen
2007-12-20 14:09 ` [AppArmor 31/47] Add d_namespace_path() to compute namespace relative pathnames John, Johansen
2007-12-20 14:09 ` [AppArmor 32/47] From: Miklos Szeredi <mszeredi@suse.cz> John, Johansen
2007-12-20 14:09 ` [AppArmor 33/47] VFS: new fsetattr() file operation John, Johansen
2007-12-20 14:09 ` [AppArmor 34/47] Pass struct file down the inode_*xattr security LSM hooks John, Johansen
2007-12-20 14:09 ` [AppArmor 35/47] Factor out sysctl pathname code John, Johansen
2007-12-20 14:09 ` [AppArmor 36/47] Allow permission functions to tell between parent and leaf checks John, Johansen
2007-12-20 14:09 ` [AppArmor 37/47] Switch to vfs_permission() in do_path_lookup() John, Johansen
2007-12-20 14:09 ` [AppArmor 38/47] Switch to vfs_permission() in sys_fchdir() John, Johansen
2007-12-20 14:09 ` [AppArmor 39/47] Fix file_permission() John, Johansen
2007-12-20 14:09 ` [AppArmor 40/47] Export audit subsystem for use by modules John, Johansen
2007-12-20 14:09 ` [AppArmor 41/47] AppArmor: Main Part John, Johansen
2007-12-20 14:09 ` [AppArmor 42/47] AppArmor: Module and LSM hooks John, Johansen
2007-12-20 14:09 ` [AppArmor 43/47] AppArmor: Profile loading and manipulation, pathname matching John, Johansen
2007-12-20 14:09 ` [AppArmor 44/47] AppArmor: all the rest John, Johansen
2007-12-20 14:09 ` [AppArmor 45/47] Add AppArmor LSM to security/Makefile John, Johansen
2007-12-20 14:09 ` [AppArmor 46/47] add simple network toggles to apparmor John, Johansen
2007-12-20 14:09 ` [AppArmor 47/47] --- Documentation/lsm/AppArmor-Security-Goal.txt | 134 +++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) John, Johansen
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