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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 6F114C433E0 for ; Sun, 7 Jun 2020 14:27:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A4452064C for ; Sun, 7 Jun 2020 14:27:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=canb.auug.org.au header.i=@canb.auug.org.au header.b="PcFILSxK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726673AbgFGO1i (ORCPT ); Sun, 7 Jun 2020 10:27:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726595AbgFGO1i (ORCPT ); Sun, 7 Jun 2020 10:27:38 -0400 Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6D6E8C08C5C3; Sun, 7 Jun 2020 07:27:38 -0700 (PDT) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 49fzHX1vzxz9sRR; Mon, 8 Jun 2020 00:27:36 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=canb.auug.org.au; s=201702; t=1591540056; bh=ozemjoQ+jyIL5Skqab22pLsAweolvWFNHsQUTkpkzcY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=PcFILSxKMUW6V4EavkPGxAfXWjGnvEclP1O1lp9UP3c1BB5Fx1YDW5ThT+hTzifls I8PhHDTj7HvrrsS6DPXnV6YG+uUEhkqALGA8OYfNOyCJkC6n//ngGLtCm+1Kvf8ORD KNK4LMohkEMPLXIXQA8cpzU7eDjNIjqqH4mU5R4a1osyAfsAQqxDtdaa0ZDnv+McJX uMsQsh/rMsMDOajubb+TPlsambhmnXKew59CQ71C9CAFRO5SpwvM3KBjBu4sbS33Dq pES3ec6R6zF+FwBwbGe13Qcky8r/ws/7qUceUj7RuYXXxiJQfTUR8ztn5QjpqdgBmJ Dj0KgSzq0m7ww== Date: Mon, 8 Jun 2020 00:27:35 +1000 From: Stephen Rothwell To: syzbot Cc: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-next@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Subject: Re: linux-next test error: BUG: using smp_processor_id() in preemptible [ADDR] code: kworker/u4:LINE/198 Message-ID: <20200608002735.32311614@canb.auug.org.au> In-Reply-To: <0000000000008e483f05a773388c@google.com> References: <0000000000008e483f05a773388c@google.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/5O_yLLI8gGPQJ26puuUp6h/"; protocol="application/pgp-signature"; micalg=pgp-sha256 Sender: linux-next-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org --Sig_/5O_yLLI8gGPQJ26puuUp6h/ Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi syzbot, On Sat, 06 Jun 2020 17:03:15 -0700 syzbot wrote: > > Hello, >=20 > syzbot found the following crash on: >=20 > HEAD commit: 0e21d462 Add linux-next specific files for 20200602 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=3D107072f2100000 > kernel config: https://syzkaller.appspot.com/x/.config?x=3Decc1aef35f550= ee3 > dashboard link: https://syzkaller.appspot.com/bug?extid=3Dca020d38a27ddc8= e3cae > compiler: gcc (GCC) 9.0.0 20181231 (experimental) >=20 > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+ca020d38a27ddc8e3cae@syzkaller.appspotmail.com >=20 > BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:= 4/198 > caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711 > CPU: 0 PID: 198 Comm: kworker/u4:4 Not tainted 5.7.0-next-20200602-syzkal= ler #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS G= oogle 01/01/2011 > Workqueue: writeback wb_workfn (flush-8:0) > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x18f/0x20d lib/dump_stack.c:118 > check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48 > ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711 > ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244 > ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626 > mpage_map_one_extent fs/ext4/inode.c:2377 [inline] > mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline] > ext4_writepages+0x1ab5/0x3400 fs/ext4/inode.c:2782 > do_writepages+0xfa/0x2a0 mm/page-writeback.c:2338 > __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1453 > writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1717 > __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1786 > wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1895 > wb_check_old_data_flush fs/fs-writeback.c:1997 [inline] > wb_do_writeback fs/fs-writeback.c:2050 [inline] > wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2079 > process_one_work+0x965/0x1690 kernel/workqueue.c:2269 > worker_thread+0x96/0xe10 kernel/workqueue.c:2415 > kthread+0x3b5/0x4a0 kernel/kthread.c:291 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 > tipc: TX() has been purged, node left! >=20 >=20 > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. >=20 > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. #syz dup: linux-next test error: BUG: using smp_processor_id() in preemptib= le [ADDR] code: syz-fuzzer/6792 --=20 Cheers, Stephen Rothwell --Sig_/5O_yLLI8gGPQJ26puuUp6h/ Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAl7c+VcACgkQAVBC80lX 0GxR1QgApf+7sM7t85Zy5Fef9wVS7Jq2k8MJGd+SE8DOYR4L1aC7KzNvG9Clcoem TYronHepjNA3A9kvuB5E0Y8b/ZU2aRzYYJUOq4CdjAelS+tTgBE+ehbu/9FyFBvG gi8D8LqC8zGQHeIiFgAW1r1r57DzKF+7BxWQrhM4uUGqlfwH0ZxJcHI1eMTEN8eB eIGJK3oBAdtbz9uM/6nRhYB3OhjMAk9pEcq6CCUyAS4KxU10DmP9TDetsMwMaAs7 EudhykgtdL6TZwakuFZoh/N6VsH1taTBYaHfwBVOkgQ0aV4VpPEjIZP53m0IOpHP dsx8HdCivlhlknCE9+546qPP0sIjmA== =wO+N -----END PGP SIGNATURE----- --Sig_/5O_yLLI8gGPQJ26puuUp6h/--