[PATCH] sanitize __user_walk_fd() et.al.

* do not pass nameidata; struct path is all the callers want.
* switch to new helpers:
	user_path_at(dfd, pathname, flags, &path)
	user_path(pathname, &path)
	user_lpath(pathname, &path)
	user_path_dir(pathname, &path)  (fail if not a directory)
  The last 3 are trivial macro wrappers for the first one.
* remove nameidata in callers.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2 files changed, 10 insertions, 10 deletions

diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 32ca1b927307..6e943135f0e0 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -253,15 +253,15 @@ do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
 }
 
 asmlinkage int
-osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz)
+osf_statfs(char __user *pathname, struct osf_statfs __user *buffer, unsigned long bufsiz)
 {
-        struct nameidata nd;
+        struct path path;
         int retval;
 
-        retval = user_path_walk(path, &nd);
+        retval = user_path(pathname, &path);
         if (!retval) {
-                retval = do_osf_statfs(nd.path.dentry, buffer, bufsiz);
-                path_put(&nd.path);
+                retval = do_osf_statfs(path.dentry, buffer, bufsiz);
+                path_put(&path);
         }
         return retval;
 }
diff --git a/arch/parisc/hpux/sys_hpux.c b/arch/parisc/hpux/sys_hpux.c
index be255ebb609c..18072e03a019 100644
--- a/arch/parisc/hpux/sys_hpux.c
+++ b/arch/parisc/hpux/sys_hpux.c
@@ -210,19 +210,19 @@ static int vfs_statfs_hpux(struct dentry *dentry, struct hpux_statfs *buf)
 }
 
 /* hpux statfs */
-asmlinkage long hpux_statfs(const char __user *path,
+asmlinkage long hpux_statfs(const char __user *pathname,
                                                 struct hpux_statfs __user *buf)
 {
-        struct nameidata nd;
+        struct path path;
         int error;
 
-        error = user_path_walk(path, &nd);
+        error = user_path(pathname, &path);
         if (!error) {
                 struct hpux_statfs tmp;
-                error = vfs_statfs_hpux(nd.path.dentry, &tmp);
+                error = vfs_statfs_hpux(path.dentry, &tmp);
                 if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                         error = -EFAULT;
-                path_put(&nd.path);
+                path_put(&path);
         }
         return error;
 }