From nobody Sun Feb 8 05:53:46 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB523EB64DA for ; Mon, 19 Jun 2023 04:44:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229671AbjFSEoT (ORCPT ); Mon, 19 Jun 2023 00:44:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48922 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229482AbjFSEoR (ORCPT ); Mon, 19 Jun 2023 00:44:17 -0400 Received: from mail-pg1-x531.google.com (mail-pg1-x531.google.com [IPv6:2607:f8b0:4864:20::531]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5A721B8 for ; Sun, 18 Jun 2023 21:44:15 -0700 (PDT) Received: by mail-pg1-x531.google.com with SMTP id 41be03b00d2f7-53fbf2c42bfso2482069a12.3 for ; Sun, 18 Jun 2023 21:44:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1687149855; x=1689741855; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=DRiCzck3okYf2yD4tBPHZkTboxRNgYiqksP+cRAkLVk=; b=mnc3P2Qj80BPwmWZJ0SVhjnbMIysbydBl46s6xqRQvO6P7LLdvLW35FqowO6QuOymq cvUNzzIUItOymNe+uuS961cxI0bUV/Y5E0fc8gpnPHl7BZ7oHEM83CO+zed//5qiNaEM HmNOizLx4YH5oO/OYTuPPhKyqgqpz7rNuYB/gOPhwDdjPsY1l3mWx060dmu6C02y0rz2 9yTbSORX0vuGoyvtsMUQYYZ6uIhCAxuy1Lu0KFULktlwbwO0m4PcYmCc/QpUf38NYnRc EtFOcyItjxj9CzqdfJG0gqvpBiDsfDOaznXs9fso72eZ/vxGbe96VP3xBriKH83rs79Z vWSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687149855; x=1689741855; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=DRiCzck3okYf2yD4tBPHZkTboxRNgYiqksP+cRAkLVk=; b=MNNLqtred+BUfwxjabtMIMznkXxoD4N4OKnM1CNUdJvlVdabN9epT05RasPEPdJA+B pIp/snEY3yaU7ym8rmd8PJN3fAwm5UKkdexsx+OnCMf44bfUDbio1aW2gJ5KBS+GLB6/ M2pwez5yh6S52RfQQkuBqpdz78QZ1YxnrDm7jhxj5kouCgcKNaH+xUeyijdxYo+ZCDSU yZO4XoEsanGvtJq0dJNhyeFRoXewVzW/sU/ch9r7aPCjMVjsHqqq7YZWgkk1f1T6Y6RR Zaf/4xYJtghjmzyhvaCLpoA0NbHcRTzxtixofPZ/KiKT4DzEe2pQBo3QyfMT7+2YSbIg Dh+w== X-Gm-Message-State: AC+VfDy5XBixypLkK0er+ZNIKUpbTTTQCv96d7ROirrWVNvDaSX/KIFK DIqz1jmqT5o+zFQm0hghlaQ= X-Google-Smtp-Source: ACHHUZ6lV6WX6WtLXua+DDOER+macE3jWFt0K/xpjSbRgR8zXbpQqOMO/D+579fT0bGGeW9WjBl82A== X-Received: by 2002:a05:6a20:8f15:b0:121:4ae4:ee2e with SMTP id b21-20020a056a208f1500b001214ae4ee2emr4976747pzk.34.1687149854925; Sun, 18 Jun 2023 21:44:14 -0700 (PDT) Received: from aa-PC.zhaoxin.com ([180.169.121.82]) by smtp.gmail.com with ESMTPSA id w22-20020a1709027b9600b001ac95be5081sm19379400pll.307.2023.06.18.21.44.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 18 Jun 2023 21:44:14 -0700 (PDT) From: Liam Ni To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, rppt@kernel.org, Liam Ni Subject: [PATCH] mm/sparse: Check the return value of first_present_section_nr() Date: Mon, 19 Jun 2023 12:44:03 +0800 Message-Id: <20230619044403.1519685-1-zhiguangni01@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" first_present_section_nr() may return -1, which means there is no present section in system,or other errors, so we cause panic here. Signed-off-by: Liam Ni --- mm/sparse.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/sparse.c b/mm/sparse.c index b8d5d58fe240..175727e10deb 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -564,6 +564,8 @@ void __init sparse_init(void) memblocks_present(); =20 pnum_begin =3D first_present_section_nr(); + if (pnum_begin =3D=3D -1) + panic("There is no present section in system\n"); nid_begin =3D sparse_early_nid(__nr_to_section(pnum_begin)); =20 /* Setup pageblock_order for HUGETLB_PAGE_SIZE_VARIABLE */ --=20 2.25.1