diff -ur linux-2.6.9/fs/cifs/connect.c linux-2.6.9-fix/fs/cifs/connect.c
--- linux-2.6.9/fs/cifs/connect.c	2007-09-26 11:54:19.000000000 +0200
+++ linux-2.6.9-fix/fs/cifs/connect.c	2007-09-26 11:58:51.000000000 +0200
@@ -1831,6 +1831,16 @@
 		cFYI(1, ("Existing smb sess found"));
 		kfree(volume_info.password);
 		/* volume_info.UNC freed at end of function */
+
+		/* need to prevent multiple threads trying to
+		simultaneously reconnect the same SMB session */
+		down(&pSesInfo->sesSem);
+		if(pSesInfo->status == CifsNeedReconnect) {
+			rc = cifs_setup_session(0, pSesInfo,
+					        cifs_sb->local_nls);
+		}
+		up(&pSesInfo->sesSem);
+
 	} else if (!rc) {
 		cFYI(1, ("Existing smb sess not found"));
 		pSesInfo = sesInfoAlloc();