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 F3288C433E0 for ; Sun, 7 Jun 2020 14:26:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CA0192064C for ; Sun, 7 Jun 2020 14:26:39 +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="iNvZZKbF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726679AbgFGO0f (ORCPT ); Sun, 7 Jun 2020 10:26:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43196 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726615AbgFGO0f (ORCPT ); Sun, 7 Jun 2020 10:26:35 -0400 Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E2B6C08C5C3; Sun, 7 Jun 2020 07:26:35 -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 49fzGK1H3yz9sRR; Mon, 8 Jun 2020 00:26:33 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=canb.auug.org.au; s=201702; t=1591539993; bh=fBU38VASPvpTXqBHSAfc0fHBHWRr0IgmWg+cDVLfiiU=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=iNvZZKbFzWyjNTxLGjeanGieBKVbn7NfRD1Z7HtMUxtrCHEijQD4s+PM3AAo+tv0x dl6Xevdx9m9t7s4V9fEyTvZJwlpFJYw8oXSDYDtowoSi5c2Q1eNxTL4pHaCTbmMue1 1uMnCv4g1WF7mV/eCOD0qSv4ZH89BXUD10VBmrhffeIaHs5sOOqG34tdWTT7m/Urhc WXeSqTLSRo0FDxpeJOTweWH1nwOG3ZWLBl/EhZS4anAgT7VI+Euwq96M3GBfMwatN1 yFuqVg686nWbM1Is0SOd7WqBTavvNZNm12nGULQSMrwIlu2yo8vncWtQ4B81tQWdKY sG1Ho3mZcKfeQ== Date: Mon, 8 Jun 2020 00:26:32 +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: syz-fuzzer/6793 Message-ID: <20200608002632.392b79b1@canb.auug.org.au> In-Reply-To: <000000000000872ad205a77c947c@google.com> References: <000000000000872ad205a77c947c@google.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/mclT.rawDJ0Wx4O+9TdoaCN"; protocol="application/pgp-signature"; micalg=pgp-sha256 Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org --Sig_/mclT.rawDJ0Wx4O+9TdoaCN Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi syzbot, On Sun, 07 Jun 2020 04:13:13 -0700 syzbot wrote: > > Hello, >=20 > syzbot found the following crash on: >=20 > HEAD commit: 48f99181 Add linux-next specific files for 20200603 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=3D1006bca6100000 > kernel config: https://syzkaller.appspot.com/x/.config?x=3D365f706273eaf= 502 > dashboard link: https://syzkaller.appspot.com/bug?extid=3D878f276b4892a44= 38f95 > 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+878f276b4892a4438f95@syzkaller.appspotmail.com >=20 > BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/= 6793 > caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711 > CPU: 1 PID: 6793 Comm: syz-fuzzer Not tainted 5.7.0-next-20200603-syzkall= er #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS G= oogle 01/01/2011 > 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 > ext4_getblk+0xad/0x520 fs/ext4/inode.c:833 > ext4_bread+0x7c/0x380 fs/ext4/inode.c:883 > ext4_append+0x153/0x360 fs/ext4/namei.c:67 > ext4_init_new_dir fs/ext4/namei.c:2757 [inline] > ext4_mkdir+0x5e0/0xdf0 fs/ext4/namei.c:2802 > vfs_mkdir+0x419/0x690 fs/namei.c:3632 > do_mkdirat+0x21e/0x280 fs/namei.c:3655 > do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 > entry_SYSCALL_64_after_hwframe+0x44/0xa9 > RIP: 0033:0x4b02a0 > Code: Bad RIP value. > RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 > RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 > RDX: 00000000000001c0 RSI: 000000c000026960 RDI: ffffffffffffff9c > RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff > R13: 000000000000004c R14: 000000000000004b R15: 0000000000000100 >=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_/mclT.rawDJ0Wx4O+9TdoaCN Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAl7c+RgACgkQAVBC80lX 0Gyokgf/aJqe1EULZ22lvRy+LkFe558CoxybDc3V5WlwcfxU0J+7so7eft4AfKKX 0rPnqV4FPpSmvRZVh8Wave4pSFATs9JreC0MkPHEyoYb2+bGUULGTwQtPhFNWYug pFcFu3C0OsxojiMvQwG4CoXndLvy7PVEr1g7FjVphmTVzxajqpOGXQubZesplFIL FdTI0in13Pb80DjTlfRyxPDr0vCxti6LxNbTO+SL49I2apMC+Gs5SxerFhvfgiZw EXwrK056Ul6mY8l5F+mYFeO8y/Nnw7jq53+36pzY2B1vNbWcAFFdK6BwdVH1Zo5/ aTCN1MXTsRxrdTE/QR/j0CuoULBgYQ== =6DUw -----END PGP SIGNATURE----- --Sig_/mclT.rawDJ0Wx4O+9TdoaCN--