From: Philip Homburg <philip@cs.vu.nl>
Date: Wed, 8 Aug 2007 15:26:47 +0000 (+0000)
Subject: Directory check before access check.
X-Git-Tag: v3.1.4~334
X-Git-Url: http://zhaoyanbai.com/repos/man.dig.html?a=commitdiff_plain;h=e2f06e7c892ab8f2eba3ad04a1f4844fd72944a8;p=minix.git

Directory check before access check.
---

diff --git a/servers/vfs/link.c b/servers/vfs/link.c
index b61bfb217..0e901f4b3 100644
--- a/servers/vfs/link.c
+++ b/servers/vfs/link.c
@@ -68,6 +68,14 @@ PUBLIC int do_link()
         return EXDEV;
   }
 
+  /* Make sure that the object is a directory */
+  if ((vp_d->v_mode & I_TYPE) != I_DIRECTORY)
+  {
+	put_vnode(vp_o);
+	put_vnode(vp_d);
+	return ENOTDIR;
+  }
+
   r= forbidden(vp_d, W_BIT|X_BIT, 0 /*!use_realuid*/);
   if (r != OK)
   {