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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 AD8B3C43331 for ; Thu, 2 Apr 2020 11:02:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8D3FB206F8 for ; Thu, 2 Apr 2020 11:02:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387977AbgDBLCP (ORCPT ); Thu, 2 Apr 2020 07:02:15 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:34982 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728803AbgDBLCN (ORCPT ); Thu, 2 Apr 2020 07:02:13 -0400 Received: by mail-io1-f69.google.com with SMTP id c10so2483204ioc.2 for ; Thu, 02 Apr 2020 04:02:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=HEen/pjteG0riA5Fq+vm6ECwHW6v+ASlw0ZuUHgsq9k=; b=cDRr/or1k2ab4qVsZqhhUvhdU6+si7BZp54EYl/s1Ao0OxFucYMJXQrzakC4zsNtUj LIXOG0pn1nRygkFFi8WoIpaHk7B76KkueyjfN0uAcNleVfGXOClPqdabL2p6agXvSAF4 D5IMc0kXdyBQCLmsWbwwtDDFZLA4qgG3IVQgBvFIvXvCxWkzFhnGGWfS6EeZcstmP3RG m2UoZzLR4ofj9JJH57qTDfK4FlT7TyVA54WErNO9fxXxDni2n9afD3e4rFDAqSR1uI8b yIPngMMUUt9VoR7qamHgXxNGF6HA2g5A0LzrUGvQ7mDIpaJNCHkjKMC4/4cPee1H3m+v RJ4Q== X-Gm-Message-State: AGi0PuZLPZ4Nh74JRyCeFbxoWTfW2DCjh6lsMxjLVA6HBOsCgbRjpLKE 8UenyE3Oi5x1AmqgOKnLgHHibPD45grOoe1e/QG6iJzvpa4A X-Google-Smtp-Source: APiQypKHwawm+XbPWjWm1WiRkJzzTagLnpKvQGlicoTPOrocdiTCMJ/gjTwzIrZQK9hMY9riqRRVEZaqILPuquo840fL+Y/tOjQR MIME-Version: 1.0 X-Received: by 2002:a02:8c4:: with SMTP id 187mr2706675jac.50.1585825331302; Thu, 02 Apr 2020 04:02:11 -0700 (PDT) Date: Thu, 02 Apr 2020 04:02:11 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008c5a4605a24cbb16@google.com> Subject: WARNING in ext4_da_update_reserve_space From: syzbot To: a@unstable.cc, adilger.kernel@dilger.ca, b.a.t.m.a.n@lists.open-mesh.org, benh@kernel.crashing.org, davem@davemloft.net, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, mareklindner@neomailbox.ch, mpe@ellerman.id.au, muriloo@linux.ibm.com, netdev@vger.kernel.org, paulus@samba.org, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 1a147b74 Merge branch 'DSA-mtu' git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=14237713e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=46ee14d4915944bc dashboard link: https://syzkaller.appspot.com/bug?extid=67e4f16db666b1c8253c compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12237713e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10ec7c97e00000 The bug was bisected to: commit 658b0f92bc7003bc734471f61bf7cd56339eb8c3 Author: Murilo Opsfelder Araujo Date: Wed Aug 1 21:33:15 2018 +0000 powerpc/traps: Print unhandled signals in a separate function bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15979f5be00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=17979f5be00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13979f5be00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+67e4f16db666b1c8253c@syzkaller.appspotmail.com Fixes: 658b0f92bc70 ("powerpc/traps: Print unhandled signals in a separate function") EXT4-fs warning (device sda1): ext4_da_update_reserve_space:344: ext4_da_update_reserve_space: ino 15722, used 1 with only 0 reserved data blocks ------------[ cut here ]------------ WARNING: CPU: 1 PID: 359 at fs/ext4/inode.c:348 ext4_da_update_reserve_space+0x622/0x7d0 fs/ext4/inode.c:344 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 359 Comm: kworker/u4:5 Not tainted 5.6.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-8:0) Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:ext4_da_update_reserve_space+0x622/0x7d0 fs/ext4/inode.c:348 Code: 02 00 0f 85 94 01 00 00 48 8b 7d 28 49 c7 c0 20 72 3c 88 41 56 48 c7 c1 80 60 3c 88 53 ba 58 01 00 00 4c 89 c6 e8 1e 6d 0d 00 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 04 RSP: 0018:ffffc90002197288 EFLAGS: 00010296 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff820bf066 RDI: fffff52000432e21 RBP: ffff888086b744c8 R08: 0000000000000091 R09: ffffed1015ce6659 R10: ffffed1015ce6658 R11: ffff8880ae7332c7 R12: 0000000000000001 R13: ffff888086b74990 R14: 0000000000000000 R15: ffff888086b74a40 ext4_ext_map_blocks+0x24aa/0x37d0 fs/ext4/extents.c:4500 ext4_map_blocks+0x4cb/0x1650 fs/ext4/inode.c:622 mpage_map_one_extent fs/ext4/inode.c:2365 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2418 [inline] ext4_writepages+0x19eb/0x3080 fs/ext4/inode.c:2772 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344 __writeback_single_inode+0x12a/0x1410 fs/fs-writeback.c:1452 writeback_sb_inodes+0x515/0xdd0 fs/fs-writeback.c:1716 wb_writeback+0x2a5/0xd90 fs/fs-writeback.c:1892 wb_do_writeback fs/fs-writeback.c:2037 [inline] wb_workfn+0x339/0x11c0 fs/fs-writeback.c:2078 process_one_work+0x94b/0x1690 kernel/workqueue.c:2266 worker_thread+0x96/0xe20 kernel/workqueue.c:2412 kthread+0x357/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches