[AppArmor 43/45] Switch to vfs_permission() in do_path_lookup()

[jjohansen]

Switch from file_permission() to vfs_permission() in do_path_lookup():
this avoids calling permission() with a NULL nameidata here.

Signed-off-by: Andreas Gruenbacher <agruen@xxxxxxx>
Signed-off-by: John Johansen <jjohansen@xxxxxxx>

---
 fs/namei.c |   13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1148,25 +1148,24 @@ static int fastcall do_path_lookup(int d
 		nd->dentry = dget(fs->pwd);
 		read_unlock(&fs->lock);
 	} else {
-		struct dentry *dentry;
-
 		file = fget_light(dfd, &fput_needed);
 		retval = -EBADF;
 		if (!file)
 			goto out_fail;
 
-		dentry = file->f_path.dentry;
+		nd->dentry = file->f_path.dentry;
+		nd->mnt = file->f_path.mnt;
 
 		retval = -ENOTDIR;
-		if (!S_ISDIR(dentry->d_inode->i_mode))
+		if (!S_ISDIR(nd->dentry->d_inode->i_mode))
 			goto fput_fail;
 
-		retval = file_permission(file, MAY_EXEC);
+		retval = vfs_permission(nd, MAY_EXEC);
 		if (retval)
 			goto fput_fail;
 
-		nd->mnt = mntget(file->f_path.mnt);
-		nd->dentry = dget(dentry);
+		mntget(nd->mnt);
+		dget(nd->dentry);
 
 		fput_light(file, fput_needed);
 	}

-- 

-
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