--- x/fs/exec.c.~1~	2003-10-10 08:08:12.000000000 +0200
+++ x/fs/exec.c	2003-10-17 21:31:49.000000000 +0200
@@ -426,6 +426,13 @@ static int exec_mmap(void)
 	struct mm_struct * mm, * old_mm;
 
 	old_mm = current->mm;
+	if (old_mm && atomic_read(&old_mm->mm_users) == 1) {
+		mm_release();
+		down_write(&old_mm->mmap_sem);
+		exit_mmap(old_mm);
+		up_write(&old_mm->mmap_sem);
+		return 0;
+	}
 
 	mm = mm_alloc();
 	if (mm) {