From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDDBDC433E1 for ; Tue, 2 Jun 2020 04:52:52 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B3E632072F for ; Tue, 2 Jun 2020 04:52:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="ki5tFNPz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B3E632072F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 53ADC28006B; Tue, 2 Jun 2020 00:52:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4C4BE280012; Tue, 2 Jun 2020 00:52:52 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3B24B28006B; Tue, 2 Jun 2020 00:52:52 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0065.hostedemail.com [216.40.44.65]) by kanga.kvack.org (Postfix) with ESMTP id 1DB96280012 for ; Tue, 2 Jun 2020 00:52:52 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id CEFD78248047 for ; Tue, 2 Jun 2020 04:52:51 +0000 (UTC) X-FDA: 76883051742.03.offer81_53278ba4fe73e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin03.hostedemail.com (Postfix) with ESMTP id ABAB228A4E8 for ; Tue, 2 Jun 2020 04:52:51 +0000 (UTC) X-HE-Tag: offer81_53278ba4fe73e X-Filterd-Recvd-Size: 3898 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf25.hostedemail.com (Postfix) with ESMTP for ; Tue, 2 Jun 2020 04:52:51 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 458D7207D5; Tue, 2 Jun 2020 04:52:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591073570; bh=zm3OmR7Z67ldFsGRAoAijiIpfR6qxqWPKNeBYl3ZKAE=; h=Date:From:To:Subject:In-Reply-To:From; b=ki5tFNPzx6z6fcO2zUbppJReoHyIPyu2O1oNYuVE8ziGy0pRPxNSkBCq52uEu/T9C ghJRWZMZ7tND1DyYq4kmCzhSMuhGn6et3H4S28inmqiyb2IaXAQpGTT3qiGNIz4oOH mJbR2M/eE0cKUNo+GcX127q0dPxVWA5ihC/OTvGQ= Date: Mon, 01 Jun 2020 21:52:49 -0700 From: Andrew Morton To: akpm@linux-foundation.org, aryabinin@virtuozzo.com, chunyan.zhang@unisoc.com, dvyukov@google.com, glider@google.com, jing.xia@unisoc.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, orson.zhai@unisoc.com, torvalds@linux-foundation.org Subject: [patch 127/128] mm/mm_init.c: report kasan-tag information stored in page->flags Message-ID: <20200602045249.sPyr89GXs%akpm@linux-foundation.org> In-Reply-To: <20200601214457.919c35648e96a2b46b573fe1@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Queue-Id: ABAB228A4E8 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Jing Xia Subject: mm/mm_init.c: report kasan-tag information stored in page->flags The pageflags_layout_usage shows incorrect message by means of mminit_loglevel when Kasan runs in the mode of software tag-based enabled with CONFIG_KASAN_SW_TAGS. This patch corrects it and reports kasan-tag information. Link: http://lkml.kernel.org/r/1586929370-10838-1-git-send-email-jing.xia.mail@gmail.com Signed-off-by: Jing Xia Cc: Chunyan Zhang Cc: Orson Zhai Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Dmitry Vyukov Signed-off-by: Andrew Morton --- mm/mm_init.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) --- a/mm/mm_init.c~mm-init-report-kasan-tag-information-stored-in-page-flags +++ a/mm/mm_init.c @@ -67,26 +67,30 @@ void __init mminit_verify_pageflags_layo unsigned long or_mask, add_mask; shift = 8 * sizeof(unsigned long); - width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH - LAST_CPUPID_SHIFT; + width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH + - LAST_CPUPID_SHIFT - KASAN_TAG_WIDTH; mminit_dprintk(MMINIT_TRACE, "pageflags_layout_widths", - "Section %d Node %d Zone %d Lastcpupid %d Flags %d\n", + "Section %d Node %d Zone %d Lastcpupid %d Kasantag %d Flags %d\n", SECTIONS_WIDTH, NODES_WIDTH, ZONES_WIDTH, LAST_CPUPID_WIDTH, + KASAN_TAG_WIDTH, NR_PAGEFLAGS); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_shifts", - "Section %d Node %d Zone %d Lastcpupid %d\n", + "Section %d Node %d Zone %d Lastcpupid %d Kasantag %d\n", SECTIONS_SHIFT, NODES_SHIFT, ZONES_SHIFT, - LAST_CPUPID_SHIFT); + LAST_CPUPID_SHIFT, + KASAN_TAG_WIDTH); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_pgshifts", - "Section %lu Node %lu Zone %lu Lastcpupid %lu\n", + "Section %lu Node %lu Zone %lu Lastcpupid %lu Kasantag %lu\n", (unsigned long)SECTIONS_PGSHIFT, (unsigned long)NODES_PGSHIFT, (unsigned long)ZONES_PGSHIFT, - (unsigned long)LAST_CPUPID_PGSHIFT); + (unsigned long)LAST_CPUPID_PGSHIFT, + (unsigned long)KASAN_TAG_PGSHIFT); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodezoneid", "Node/Zone ID: %lu -> %lu\n", (unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT), _