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[2620:137:e000::1:20]) by mx.google.com with ESMTP id g22-20020a170906521600b006b1c4eaf5a0si7573854ejm.756.2022.03.01.09.40.53; Tue, 01 Mar 2022 09:41:16 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linux-foundation.org header.s=korg header.b=fuxIhc29; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236064AbiCARei (ORCPT + 99 others); Tue, 1 Mar 2022 12:34:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234133AbiCAReh (ORCPT ); Tue, 1 Mar 2022 12:34:37 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1092D41 for ; Tue, 1 Mar 2022 09:33:52 -0800 (PST) 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 ams.source.kernel.org (Postfix) with ESMTPS id 2B340B81BE7 for ; Tue, 1 Mar 2022 17:33:51 +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-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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()