svn commit: r199357 - stable/8/sys/kern

[Konstantin Belousov]

Author: kib
Date: Tue Nov 17 11:46:55 2009
New Revision: 199357
URL: http://svn.freebsd.org/changeset/base/199357

Log:
  MFC r199137:
  Detect the slashdot lookup for RENAME or REMOVE in lookup(), and return
  EINVAL.

Modified:
  stable/8/sys/kern/vfs_lookup.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/xen/xenpci/   (props changed)
  stable/8/sys/netinet6/   (props changed)

Modified: stable/8/sys/kern/vfs_lookup.c
==============================================================================
--- stable/8/sys/kern/vfs_lookup.c	Tue Nov 17 11:43:53 2009	(r199356)
+++ stable/8/sys/kern/vfs_lookup.c	Tue Nov 17 11:46:55 2009	(r199357)
@@ -552,6 +552,12 @@ dirloop:
 	else
 		cnp->cn_flags &= ~ISLASTCN;
 
+	if ((cnp->cn_flags & ISLASTCN) != 0 &&
+	    cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.' &&
+	    (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) {
+		error = EINVAL;
+		goto bad;
+	}
 
 	/*
 	 * Check for degenerate name (e.g. / or "")