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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 <[email protected]>
This commit is contained in:
Al Viro 2008-07-22 09:59:21 -04:00
commit 2d8f30380a
13 changed files with 235 additions and 238 deletions
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8
fs/utimes.c
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@ -152,18 +152,18 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
error = utimes_common(&file->f_path, times);
fput(file);
} else {
struct nameidata nd;
struct path path;
int lookup_flags = 0;
if (!(flags & AT_SYMLINK_NOFOLLOW))
lookup_flags |= LOOKUP_FOLLOW;
error = __user_walk_fd(dfd, filename, lookup_flags, &nd);
error = user_path_at(dfd, filename, lookup_flags, &path);
if (error)
goto out;
error = utimes_common(&nd.path, times);
path_put(&nd.path);
error = utimes_common(&path, times);
path_put(&path);
}
out: