Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: husjdodoanthing

kernel/fork.c

@@ -2707,11 +2707,11 @@ __latent_entropy struct task_struct *copy_process(
 	hlist_del_init(&delayed.node);
 	spin_unlock_irq(&current->sighand->siglock);
 	/*
-	 * The error path returns ERR_PTR(retval), which requires a negative
-	 * errno. Normalize unexpected values to avoid returning non-error
-	 * pointers to callers.
+	 * The error path returns ERR_PTR(retval), which requires retval to be a
+	 * negative errno in the range [-MAX_ERRNO, -1]. Normalize unexpected
+	 * values to avoid returning non-error pointers to callers.
 	 */
-	if (unlikely(retval >= 0))
+	if (unlikely(retval >= 0 || retval < -MAX_ERRNO))
 		retval = -EINVAL;
 	return ERR_PTR(retval);
 }