diff --git a/Makefile b/Makefile
index 9ebe182..e86b4ba 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 16
-EXTRAVERSION = .10
+EXTRAVERSION = .11
NAME=Sliding Snow Leopard
# *DOCUMENTATION*
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index fed55e3..5e562bc 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -441,6 +441,20 @@ cifs_lookup(struct inode *parent_dir_ino
cifs_sb = CIFS_SB(parent_dir_inode->i_sb);
pTcon = cifs_sb->tcon;
+ /*
+ * Don't allow the separator character in a path component.
+ * The VFS will not allow "/", but "\" is allowed by posix.
+ */
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
+ int i;
+ for (i = 0; i < direntry->d_name.len; i++)
+ if (direntry->d_name.name[i] == '\\') {
+ cFYI(1, ("Invalid file name"));
+ FreeXid(xid);
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
/* can not grab the rename sem here since it would
deadlock in the cases (beginning of sys_rename itself)
in which we already have the sb rename sem */
-
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