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[PATCH] sanitize __user_walk_fd() et.al.

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* 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>
This commit is contained in:
Al Viro
2008-07-22 09:59:21 -04:00
parent 256984a838
commit 2d8f30380a
13 changed files with 235 additions and 238 deletions
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10
arch/parisc/hpux/sys_hpux.c
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@@ -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;
}