From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f206.google.com (mail-oi1-f206.google.com [209.85.167.206]) (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 0F4C4448396 for ; Fri, 31 Jul 2026 17:14:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785518073; cv=none; b=pH0TyPwuARxYJ9uCp+W8xYZL0xZhDDhQHN9tkpQupxdypCl19qvZPpffEKC/A/06kRAJLJO8glwD3yHlFrxSIolSmk85NB6Zn7fvrCb1Us+u49zl+2fMhI/8kVL1cXWonUVBk9nQC6VNDHR5doKK33Va6QdeIjgL60OTG2sHTuM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785518073; c=relaxed/simple; bh=hnlKnsrIMGRxavFKBceHDuGhYvRRGhbLnXMNEd0OrBM=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=SQd9KGIabhG/vczs6FJAp7BynQ2dVG0496Yz9HzEGntqzBU/DFFtiAQb9sjTSiIrCYPkUPM6eLOrhmT0FnxNIBWe4StsvHP6RmO3T75Zb+FpGSD+7v/foZ+qmLLJz3lSfp8fm78S6+FGd5HwbS3XCCQnFJtgKu/x0WN99L4HW3s= 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=209.85.167.206 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-oi1-f206.google.com with SMTP id 5614622812f47-495b8b30310so1607498b6e.1 for ; Fri, 31 Jul 2026 10:14:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785518071; x=1786122871; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=y/64JuiEqi94j506cuIciDVsPEU8nZBUvLfJTByWCl4=; b=FAcMH4xoaXphLG2BkzzP0a1YJboxjlo/SZQG7FGKaXCTO5OjD6YDUeQ7T2TCO9vNur ZpoythG8LG/tfxa30lr+cdDI78iVpmY7Z5uPeKdYZVkHtcZ2+Tsgstn8OyWs8YTAuTWy YiWl7RqP7SSw5fPLpyMlPfim+rH98qefk0dMMKRaQCvTCgkRHhmBYUYwfYbGKVBK2riL 5DTsfNNSDa6t4XimOJwbJUAyUIGV5xCLbpLOuS3qynfgCNFfbDQA2lz/O6YGaPIUZ/HI 049VGahIBqcQ4XmNvJn7yLZh3xmaoFBE6kpp7XaRU8x4mNajrFjSZ5mCvDbHHmGWqabk rSmg== X-Forwarded-Encrypted: i=1; AHgh+RpV7nZMLEpO5g6YjwKQKl1J6VCNpTnKW876Q9HCduT1RODhpi5INqnNtT3P951O7ytSMkqLiPdzWaPsTvE=@vger.kernel.org X-Gm-Message-State: AOJu0YwPqvULIr8teQj1MjN3gN2wjjspgm73VFCEjnSBF7J6fk6ceKXz 2b/+w/Rpm6HebtbHJwrqaBUWyw9nD4gFYqwLfDbPVABKWE2dE0LROdXSuBML/IzwZessgep1YYS XZg5XkzxCcQVVB7540kTbB3En5N+CLX8iHsOqS80kQpE1e0Hn7YE9Ri9EKIE= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1247:b0:496:9b3:486 with SMTP id 5614622812f47-4af5e2fc1b2mr1287674b6e.14.1785518071042; Fri, 31 Jul 2026 10:14:31 -0700 (PDT) Date: Fri, 31 Jul 2026 10:14:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6cd7f7.2d659fcc.1d46f5.019a.GAE@google.com> Subject: [syzbot] [gfs2?] WARNING in dlm_lowcomms_close From: syzbot To: aahringo@redhat.com, gfs2@lists.linux.dev, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, teigland@redhat.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 3708dd948844 Merge tag 'pm-7.2-rc6' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12b1caea580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=04dfbd15d442517e713a compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1020a5b9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13057a49580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-3708dd94.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/57f69e2a6e3b/vmlinux-3708dd94.xz kernel image: https://storage.googleapis.com/syzbot-assets/3511d4246fb6/bzImage-3708dd94.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+04dfbd15d442517e713a@syzkaller.appspotmail.com dlm: closing connection to node 1 ------------[ cut here ]------------ !con WARNING: fs/dlm/lowcomms.c:1455 at dlm_lowcomms_close+0x3d/0x21b fs/dlm/lowcomms.c:1455, CPU#1: syz.0.18/5929 Modules linked in: CPU: 1 UID: 0 PID: 5929 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:dlm_lowcomms_close+0x3d/0x21b fs/dlm/lowcomms.c:1455 Code: 89 ee 48 c7 c7 00 eb eb 8b e8 8f 61 fc ff e8 da f8 ff ff 31 f6 89 ef 41 89 c4 e8 9e 0f a1 01 48 85 c0 75 1b e8 d4 77 e4 00 90 <0f> 0b 90 44 89 e7 bb fe ff ff ff e8 43 f8 ff ff e9 b5 01 00 00 48 RSP: 0018:ffffc9000383fbd8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff82c6f9c4 RDX: ffff888033a52540 RSI: ffffffff8125e92c RDI: ffff888033a52540 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000001 R14: ffffed1005244e10 R15: 0000000000000001 FS: 0000555565d9e500(0000) GS:ffff8880d5eda000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33163fff CR3: 000000002cf16000 CR4: 0000000000352ef0 Call Trace: dlm_midcomms_close+0x312/0x590 fs/dlm/midcomms.c:1443 drop_comm+0x62/0x1a0 fs/dlm/config.c:556 client_drop_item+0xa6/0x100 fs/configfs/dir.c:970 configfs_rmdir+0x5d3/0x950 fs/configfs/dir.c:1567 vfs_rmdir fs/namei.c:5381 [inline] vfs_rmdir+0x328/0x8a0 fs/namei.c:5354 filename_rmdir+0x31a/0x5c0 fs/namei.c:5438 __do_sys_rmdir fs/namei.c:5461 [inline] __se_sys_rmdir fs/namei.c:5458 [inline] __x64_sys_rmdir+0x46/0x70 fs/namei.c:5458 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa842f9e019 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc8c738bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 00007fa843225fa0 RCX: 00007fa842f9e019 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000040 RBP: 00007fa84303500c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa843225fac R14: 00007fa843225fa0 R15: 00007fa843225fa0 --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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