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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3E05C433EF for ; Tue, 1 Mar 2022 17:33:52 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 8475B8D0002; Tue, 1 Mar 2022 12:33:52 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 7F68F8D0001; Tue, 1 Mar 2022 12:33:52 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6E5458D0002; Tue, 1 Mar 2022 12:33:52 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0141.hostedemail.com [216.40.44.141]) by kanga.kvack.org (Postfix) with ESMTP id 5B52C8D0001 for ; Tue, 1 Mar 2022 12:33:52 -0500 (EST) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 19D29181C49BF for ; Tue, 1 Mar 2022 17:33:52 +0000 (UTC) X-FDA: 79196515104.21.A53B823 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf27.hostedemail.com (Postfix) with ESMTP id 712F340005 for ; Tue, 1 Mar 2022 17:33:51 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 640FC61239; Tue, 1 Mar 2022 17:33:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9E568C340EE; Tue, 1 Mar 2022 17:33:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1646156029; bh=nTSYxKRUBidJMvHb24iohQB1FzSc4ZEUjlCWVMB2nKM=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=fuxIhc29THQGxx+xgQsKZkVW0Wh5XIuPam/ryISWwjOl9CILSZwa8cflV1Xs4Gllb n1YSI2+emVkunbelsWd6w6CEjjA4mjjSF7L0TPNNMp/ICL2p+b9eIXv9ZUOqT2BY5y X+oidhtU6kji9Cp18u2AlwrYhes1YkClG5Q1wsY4= Date: Tue, 1 Mar 2022 09:33:48 -0800 From: Andrew Morton To: syzbot Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] kernel BUG in hugepage_add_anon_rmap Message-Id: <20220301093348.0eb7071cab3d8f0e49613fdf@linux-foundation.org> In-Reply-To: <0000000000009ee0ca05d9288b83@google.com> References: <0000000000009ee0ca05d9288b83@google.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 712F340005 X-Stat-Signature: 9tkztz7grmygqgzim6ray5ie19osnw1u X-Rspam-User: Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=fuxIhc29; dmarc=none; spf=pass (imf27.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org X-Rspamd-Server: rspam03 X-HE-Tag: 1646156031-99946 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: On Tue, 01 Mar 2022 05:57:27 -0800 syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 196d330d7fb1 Add linux-next specific files for 20220222 This seems to be a relatively old kernel? > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=15b0618a700000 > kernel config: https://syzkaller.appspot.com/x/.config?x=45b71d0aea81d553 > dashboard link: https://syzkaller.appspot.com/bug?extid=d7ed29a6231d3747fb31 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > > Unfortunately, I don't have any reproducer for this issue yet. > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+d7ed29a6231d3747fb31@syzkaller.appspotmail.com > > ------------[ cut here ]------------ > kernel BUG at mm/rmap.c:2330! BUG_ON(!PageLocked(page)) in hugepage_add_anon_rmap()