From nobody Mon Feb 9 10:57:03 2026 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E75AC8635E for ; Wed, 12 Mar 2025 01:12:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741741975; cv=none; b=JoOnEruWRm9JrGZjsnnH09soPzWQlsiYhLbwT4tnfI9ML0Bru7CLk43bzWYjoYdCePlxkMnYcDJaEgY7anQEP4phIY0mjsDCH8Z7tWnl80qcYnWX0ygs3ka06o6muDWGY/frc1tQa2V/jZxixssAZgm5SL9xyQT0zAz+cp70PGY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741741975; c=relaxed/simple; bh=0wdPpJA3G74zhCuvagASQhPmP8VJDseVqJLKak/17mk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=UC28B4acfpxxR7LA8cvWM47+WFPvgvT/ffv61sc1UjPT2I3v+FYpJ6U0pVzWeCTx3I5I4QJlYE1OO3pB6O7MwlWL7OVJdz019FCZV+/DH0ezkNqxxzGVtRp9ZC44k8gd+vGhcptXAToJUCuLVILrI9FDKbYiHafRjCEuAb50euU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: 188ecadcfedf11efa216b1d71e6e1362-20250312 X-CTIC-Tags: HR_CC_COUNT, HR_CC_DOMAIN_COUNT, HR_CC_NAME, HR_CC_NO_NAME, HR_CTE_8B HR_CTT_MISS, HR_DATE_H, HR_DATE_WKD, HR_DATE_ZONE, HR_FROM_NAME HR_SJ_LANG, HR_SJ_LEN, HR_SJ_LETTER, HR_SJ_NOR_SYM, HR_SJ_PHRASE HR_SJ_PHRASE_LEN, HR_SJ_WS, HR_TO_COUNT, HR_TO_DOMAIN_COUNT, HR_TO_NO_NAME IP_TRUSTED, SRC_TRUSTED, DN_TRUSTED, SA_EXISTED, SN_EXISTED SPF_NOPASS, DKIM_NOPASS, DMARC_NOPASS, CIE_BAD, CIE_GOOD_SPF GTI_FG_BS, GTI_RG_INFO, GTI_C_BU, AMN_T1, AMN_GOOD AMN_C_TI, AMN_C_BU, ABX_MISS_RDNS X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.45,REQID:cca12701-6ab0-466c-9635-9c1ff00f7774,IP:10, URL:0,TC:0,Content:0,EDM:0,RT:0,SF:-15,FILE:0,BULK:0,RULE:Release_Ham,ACTI ON:release,TS:-5 X-CID-INFO: VERSION:1.1.45,REQID:cca12701-6ab0-466c-9635-9c1ff00f7774,IP:10,UR L:0,TC:0,Content:0,EDM:0,RT:0,SF:-15,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:6493067,CLOUDID:74e0be48d2abf02b67b5e6b1e006481e,BulkI D:250312091244T2LLILD2,BulkQuantity:0,Recheck:0,SF:17|19|24|44|66|78|102,T C:nil,Content:0|50,EDM:-3,IP:-2,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC: nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_FAS,TF_CID_SPAM_FSD,TF_CID_SPAM_FSI X-UUID: 188ecadcfedf11efa216b1d71e6e1362-20250312 X-User: liuye@kylinos.cn Received: from localhost.localdomain [(223.70.159.239)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 1136214138; Wed, 12 Mar 2025 09:12:41 +0800 From: Liu Ye To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Liu Ye Subject: [PATCH] mm/debug: Fix minor issues in mm Date: Wed, 12 Mar 2025 09:12:36 +0800 Message-Id: <20250312011236.262766-1-liuye@kylinos.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This patch includes several minor fixes: - Fix out-of-bounds access in page_type_name(). - Simplify compound page judgment conditions. - Missing a newline character at the end of the format string. Each change is independent. Signed-off-by: Liu Ye --- mm/debug.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/mm/debug.c b/mm/debug.c index 8d2acf432385..9a3092e65765 100644 --- a/mm/debug.c +++ b/mm/debug.c @@ -62,7 +62,7 @@ static const char *page_type_name(unsigned int page_type) { unsigned i =3D (page_type >> 24) - 0xf0; =20 - if (i >=3D ARRAY_SIZE(page_type_names)) + if (i < 0 || i >=3D ARRAY_SIZE(page_type_names)) return "unknown"; return page_type_names[i]; } @@ -132,15 +132,15 @@ static void __dump_page(const struct page *page) again: memcpy(&precise, page, sizeof(*page)); head =3D precise.compound_head; - if ((head & 1) =3D=3D 0) { + if (head & 1) { + foliop =3D (struct folio *)(head - 1); + idx =3D folio_page_idx(foliop, page); + } else { foliop =3D (struct folio *)&precise; idx =3D 0; if (!folio_test_large(foliop)) goto dump; foliop =3D (struct folio *)page; - } else { - foliop =3D (struct folio *)(head - 1); - idx =3D folio_page_idx(foliop, page); } =20 if (idx < MAX_FOLIO_NR_PAGES) { @@ -165,7 +165,7 @@ static void __dump_page(const struct page *page) void dump_page(const struct page *page, const char *reason) { if (PagePoisoned(page)) - pr_warn("page:%p is uninitialized and poisoned", page); + pr_warn("page:%p is uninitialized and poisoned\n", page); else __dump_page(page); if (reason) --=20 2.25.1