From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 520877F460 for ; Mon, 18 Nov 2024 04:34:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731904463; cv=none; b=XLcuxaIdHFCGbeeF7TmcFhY/GMpJabLWh7s27H59N/JietZ4c5u97Da8DApYrhtX0bTys7pgcrUU9jbweJvzbJ308w3upK+ozZBa0kwEa84RQ+wYALhvPi8H9SxUyz3k5xxPmJ6zandYL1PbRTAwceGBbqfteUSgfDik8x2EB34= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731904463; c=relaxed/simple; bh=nAYYGGKvPU2SLH3YjjcZ1qwvVhwc2kLU819TpGwtePA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=kulUUgJo95MN12OrcHxsL+59p/oJrBU+Pp+Kicu97CCE1b2QnC4PBiOd0JqOiSVJesdBSk54ZHcSA+IAcqOzQHmS5mCGBeIwd68qPJAtfqgsWEmXXyBfFJJKjN/5axrsGwMtQTcMGgbWZ6YQwI3LUAEvJBrW7D6OCsGO4MELDHY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f200.google.com with SMTP id e9e14a558f8ab-3a3c3ecaaabso52323405ab.0 for ; Sun, 17 Nov 2024 20:34:22 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731904461; x=1732509261; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=/rwgSRg0agNab0QoDWUuCny3dkOl6ihcHjI7LHymwSU=; b=mBauG6beD/nKRT0pgiGyftND+8ESSAQw6Qdjneh475ul3SFC6ue/oDVT7Lll6OR7Nm hrzUWSEEjGy3MFP/3BVnH9KVSer4Vk76bXzh66G066y5copJ8O2sGx51g/W4gqRnkJ+e H5gab0NqL7RKhHwaSi05D46f6Sc9F79B/hVP5tTrEJ40rh5bKGk86+pbDkho7Zln+5x6 BCDFXuQ8C9sqrA1bppZRs1z74DnOOgWFROxLMwRdh6Yp/y4l/yfFZNKhnumuxnGiFmY5 nXMUBZUxvq3JKCF/LkcOgD8kJYv5qZ+NZCYztwdcSo1aCHjYMzQzWR71bbm6OwkOCPFq KDJA== X-Forwarded-Encrypted: i=1; AJvYcCXhbHhj6dk9ADS/g1N61GPhro8rukq5hVHtAHO6Xg2MNf6vTdsd6j08cfoI6qrHQrSLP/TZUELgDmgV5t8=@vger.kernel.org X-Gm-Message-State: AOJu0Yy8PjibhFBuEb19GIh24gBcpYkp1lUQfJrCApJ7v2fO4+RfGJPT JjcsRIDf2EJWutpBbokk9Sd3q9dEHSJ40KlLKYfDFZT+HRKPgS7Rm6oSgMSSWCb0EVHt8XlsKLt 85BErjZb/22wImP2bYEe+KmFF9aaq/tDZk1TE///WHMRGUAUuleW6G44= X-Google-Smtp-Source: AGHT+IHal0Idqvv4i8Vbv2KmbcqwGuSpRgyw+XbDXbbZrBEPHIurwqpSpQ/hikNunViYMYUZD+zuWslkBzntZSRGVmC+uGCuZbqg Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c6cb:0:b0:3a7:6212:f87e with SMTP id e9e14a558f8ab-3a76212fa23mr34212145ab.20.1731904461553; Sun, 17 Nov 2024 20:34:21 -0800 (PST) Date: Sun, 17 Nov 2024 20:34:21 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <673ac3cd.050a0220.87769.001f.GAE@google.com> Subject: [syzbot] [netfs?] WARNING in netfs_writepages From: syzbot To: dhowells@redhat.com, jlayton@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, netfs@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f1b785f4c787 Merge tag 'for_linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11f5ace8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=327b6119dd928cbc dashboard link: https://syzkaller.appspot.com/bug?extid=06023121b0153752a3d3 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2eb65d2a03c1/disk-f1b785f4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/70c538f32a8e/vmlinux-f1b785f4.xz kernel image: https://storage.googleapis.com/syzbot-assets/79fc36f9a44b/bzImage-f1b785f4.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+06023121b0153752a3d3@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 35 at fs/netfs/write_issue.c:573 netfs_writepages+0x350/0x9d0 fs/netfs/write_issue.c:573 Modules linked in: CPU: 0 UID: 0 PID: 35 Comm: kworker/u8:2 Not tainted 6.12.0-rc7-syzkaller-00042-gf1b785f4c787 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: writeback wb_workfn (flush-9p-3) RIP: 0010:netfs_writepages+0x350/0x9d0 fs/netfs/write_issue.c:573 Code: d5 05 00 00 4c 8b a5 90 02 00 00 4c 89 fe 48 c1 e6 0c 4c 89 e7 e8 00 04 54 ff 48 8b 44 24 10 49 39 c4 7e 09 e8 41 02 54 ff 90 <0f> 0b 90 e8 38 02 54 ff 48 8d 7b 28 48 89 f8 48 c1 e8 03 42 80 3c RSP: 0018:ffffc90000ab7400 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffea00015c0700 RCX: ffffffff82397910 RDX: ffff88801e292440 RSI: ffffffff8239791f RDI: 0000000000000006 RBP: ffff88802aac0000 R08: 0000000000000006 R09: 0000000000000000 R10: 810f000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffffc90000ab7790 R14: dffffc0000000000 R15: 000810f000000000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc1ba1a2d3d CR3: 000000003660a000 CR4: 00000000003526f0 DR0: 0000000000000003 DR1: 0000000000000004 DR2: 0000000100000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2683 __writeback_single_inode+0x166/0xfa0 fs/fs-writeback.c:1658 writeback_sb_inodes+0x603/0xfa0 fs/fs-writeback.c:1954 __writeback_inodes_wb+0xff/0x2e0 fs/fs-writeback.c:2025 wb_writeback+0x721/0xb50 fs/fs-writeback.c:2136 wb_check_old_data_flush fs/fs-writeback.c:2240 [inline] wb_do_writeback fs/fs-writeback.c:2293 [inline] wb_workfn+0x8c3/0xbc0 fs/fs-writeback.c:2321 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup