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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/alpha/kernel/osf_sys.c
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@ -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;
}