f2fs: fix wrong error hanlder in f2fs_follow_link

The page_follow_link_light returns NULL and its error pointer was remained
in nd->path.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 7e3794edae42ab5c656f2ae9fec69e7431476b35..658e8079aaf9b9020068bd30aad723d168899309 100644 (file)
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -298,16 +298,14 @@ fail:
 
 static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
-       struct page *page;
+       struct page *page = page_follow_link_light(dentry, nd);
 
-       page = page_follow_link_light(dentry, nd);
-       if (IS_ERR(page))
+       if (IS_ERR_OR_NULL(page))
                return page;
 
        /* this is broken symlink case */
        if (*nd_get_link(nd) == 0) {
-               kunmap(page);
-               page_cache_release(page);
+               page_put_link(dentry, nd, page);
                return ERR_PTR(-ENOENT);
        }
        return page;