cifs: Fix separator when building path from dentry

Make sure to use the CIFS_DIR_SEP(cifs_sb) as path separator for
prefixpath too. Fixes a bug with smb1 UNIX extensions.

Fixes: a6b5058fafdf ("fs/cifs: make share unaccessible at root level mountable")
Signed-off-by: Paulo Alcantara <palcantara@suse.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 3713d22b95a7..907e85d65bb4 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -174,7 +174,7 @@ cifs_bp_rename_retry:
 
                 cifs_dbg(FYI, "using cifs_sb prepath <%s>\n", cifs_sb->prepath);
                 memcpy(full_path+dfsplen+1, cifs_sb->prepath, pplen-1);
-                full_path[dfsplen] = '\\';
+                full_path[dfsplen] = dirsep;
                 for (i = 0; i < pplen-1; i++)
                         if (full_path[dfsplen+1+i] == '/')
                                 full_path[dfsplen+1+i] = CIFS_DIR_SEP(cifs_sb);