--- linux/ipc/sem.c	2004-03-26 05:19:22.833959160 -0800
+++ linux.new/ipc/sem.c	2004-03-26 20:59:46.496258680 -0800
@@ -972,8 +972,10 @@ static struct sem_undo *find_undo(int se
 	if(sma==NULL)
 		goto out;
 	un = ERR_PTR(-EIDRM);
-	if (sem_checkid(sma,semid))
-		goto out_unlock;
+	if (sem_checkid(sma,semid)) {
+		sem_unlock(sma);
+		goto out;
+	}
 	nsems = sma->sem_nsems;
 	sem_unlock(sma);