vfs: do_last(): make ENOENT exit RCU safe

This will allow this code to be used in RCU mode.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/namei.c b/fs/namei.c
index c6b996817bb3..a7e994bb78c2 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2361,8 +2361,10 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
         BUG_ON(nd->flags & LOOKUP_RCU);
         inode = path->dentry->d_inode;
         error = -ENOENT;
-        if (!inode)
-                goto exit_dput;
+        if (!inode) {
+                path_to_nameidata(path, nd);
+                goto exit;
+        }
 
         if (should_follow_link(inode, !symlink_ok)) {
                 if (nd->flags & LOOKUP_RCU) {