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SECURITY: remove nameidata arg from inode_follow_link.

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No ->inode_follow_link() methods use the nameidata arg, and
it is about to become private to namei.c.
So remove from all inode_follow_link() functions.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
NeilBrown 2015-03-23 13:37:39 +11:00 committed by Al Viro
parent b427264629
commit 37882db054
5 changed files with 8 additions and 12 deletions
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2
fs/namei.c
View File

@ -871,7 +871,7 @@ follow_link(struct path *link, struct nameidata *nd, void **p)
touch_atime(link);
nd_set_link(nd, NULL);
error = security_inode_follow_link(link->dentry, nd);
error = security_inode_follow_link(dentry);
if (error)
goto out_put_nd_path;

9
include/linux/security.h
View File

@ -43,7 +43,6 @@ struct file;
struct vfsmount;
struct path;
struct qstr;
struct nameidata;
struct iattr;
struct fown_struct;
struct file_operations;
@ -477,7 +476,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
* @inode_follow_link:
* Check permission to follow a symbolic link when looking up a pathname.
* @dentry contains the dentry structure for the link.
* @nd contains the nameidata structure for the parent directory.
* Return 0 if permission is granted.
* @inode_permission:
* Check permission before accessing an inode. This hook is called by the
@ -1553,7 +1551,7 @@ struct security_operations {
int (*inode_rename) (struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry);
int (*inode_readlink) (struct dentry *dentry);
int (*inode_follow_link) (struct dentry *dentry, struct nameidata *nd);
int (*inode_follow_link) (struct dentry *dentry);
int (*inode_permission) (struct inode *inode, int mask);
int (*inode_setattr) (struct dentry *dentry, struct iattr *attr);
int (*inode_getattr) (const struct path *path);
@ -1839,7 +1837,7 @@ int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags);
int security_inode_readlink(struct dentry *dentry);
int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd);
int security_inode_follow_link(struct dentry *dentry);
int security_inode_permission(struct inode *inode, int mask);
int security_inode_setattr(struct dentry *dentry, struct iattr *attr);
int security_inode_getattr(const struct path *path);
@ -2241,8 +2239,7 @@ static inline int security_inode_readlink(struct dentry *dentry)
return 0;
}
static inline int security_inode_follow_link(struct dentry *dentry,
struct nameidata *nd)
static inline int security_inode_follow_link(struct dentry *dentry)
{
return 0;
}

3
security/capability.c
View File

@ -209,8 +209,7 @@ static int cap_inode_readlink(struct dentry *dentry)
return 0;
}
static int cap_inode_follow_link(struct dentry *dentry,
struct nameidata *nameidata)
static int cap_inode_follow_link(struct dentry *dentry)
{
return 0;
}

4
security/security.c
View File

@ -581,11 +581,11 @@ int security_inode_readlink(struct dentry *dentry)
return security_ops->inode_readlink(dentry);
}
int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd)
int security_inode_follow_link(struct dentry *dentry)
{
if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
return 0;
return security_ops->inode_follow_link(dentry, nd);
return security_ops->inode_follow_link(dentry);
}
int security_inode_permission(struct inode *inode, int mask)

2
security/selinux/hooks.c
View File

@ -2861,7 +2861,7 @@ static int selinux_inode_readlink(struct dentry *dentry)
return dentry_has_perm(cred, dentry, FILE__READ);
}
static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata)
static int selinux_inode_follow_link(struct dentry *dentry)
{
const struct cred *cred = current_cred();