From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f205.google.com (mail-oi1-f205.google.com [209.85.167.205]) (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 7BA743002DD for ; Fri, 21 Aug 2026 08:47:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787302075; cv=none; b=g5fH0lOB3D/kr8ELr32y3pnt/e+/0kgWPNTxPa7LGOMRBgP4S7ls/p1bXM5uInbLi+xIGdqvdF5Vm6UFScoHp6CuwTX+OuEz7+qGqeKQvfrGhZfvlJvoTvJQcsn4m2tJFsiyVx2sIiAlNPynOfcaSDRoux/ZaNu0b671WlpJgt0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787302075; c=relaxed/simple; bh=O1ZTLIoo6Vjt6O0krePAej0tYjPgqkSyWHb2JYo6ReY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=FJ8xRdNhFBCUD8g0sj+yhGVyAik6WIat2F8MrChxM0zWTYs60kRpxDyptRW7CG+iGvUNXhQRDcQf3X9+fCBmK+33+5lcav6+pmCNKRnEYzqUx9dARvpUjQf65p4Vx4IA9AlQHaOJ6OwrQ0OsmLYvB/Zan90GcUtLkVmP9qRJfL0= 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=209.85.167.205 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-f205.google.com with SMTP id 5614622812f47-4a49f09233dso691558b6e.2 for ; Fri, 21 Aug 2026 01:47:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787302072; x=1787906872; 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=17i1DjAlI1eKRN4kR7G73skA2928LySzI999roIf94g=; b=nQTOvKZXJxfgdfxzf6uEISimmP1F7hwrlDqewT9qc+HCqv3QcGZ02NwfLlXykOeDab fDq5o/ZUAuF1fXGpovAzC6NwIHxxrjYme+T2B2LM/2HL7RNps7GE90tZLljklYGTm4v/ K8F0LfgLs+PtOxG3pwobbaTLrsTsQBN2hmvokPLcURBJHBThcejh//R6cY2xgFiGnP12 oHit/5ZoOZnKHXMmERwbzd9JVsagK/ZfgDx5X4CjD00WYWmn2Xo2Jj8wHJD79B0+oa1o OQ2i0j0TC7+ejQ5PLvSPkcecXmBeaK0rwHylTHNbl4zSEFlkIO0FyTv04C138o44jC8l DlJg== X-Forwarded-Encrypted: i=1; AHgh+Rr3Um6rRFjAMxMYHf/piIbH2v72jPaaUz806qQGj24qd2DLREkdlzE7/8bQTZ/8MOf+i3ek@lists.linux.dev X-Gm-Message-State: AOJu0Yyq+4tMFpZI05pKhUOPNDO9zETkwhbaZjUZZkYiYhMujd11GYW1 LuxeHMqMVugw+4AiAsQueoEI4uR875KmyT+s+OO/2Dgtd8Uv6CKUf8xDYNNgVJLqnROR62pQSFI IWg/Se8fsD7tl2b0DkdceSAHIUjkBgVxthmW2hW6aTGfwaNo+EhQY8VS+rYM= Precedence: bulk X-Mailing-List: gfs2@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:5242:b0:4ab:2764:1911 with SMTP id 5614622812f47-4b2ef4570d0mr5290035b6e.19.1787302072388; Fri, 21 Aug 2026 01:47:52 -0700 (PDT) Date: Fri, 21 Aug 2026 01:47:52 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a8810b8.ae6ddae5.3da009.002f.GAE@google.com> Subject: [syzbot] [gfs2?] WARNING in dlm_lowcomms_connect_node 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: 21d6ac051080 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=14bbea25580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d1128bc53f2ef7f3 dashboard link: https://syzkaller.appspot.com/bug?extid=d451adc04b34fbabccf2 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/88380e2ddcb9/disk-21d6ac05.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5dba5c2896b7/vmlinux-21d6ac05.xz kernel image: https://storage.googleapis.com/syzbot-assets/52ac739e37e0/Image-21d6ac05.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d451adc04b34fbabccf2@syzkaller.appspotmail.com dlm: ls1: dlm_recover 15333067685668308026 ------------[ cut here ]------------ WARNING: fs/dlm/lowcomms.c:557 at dlm_lowcomms_connect_node+0x14c/0x1f8 fs/dlm/lowcomms.c:558, CPU#0: dlm_recoverd/4971 Modules linked in: CPU: 0 UID: 0 PID: 4971 Comm: dlm_recoverd Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : dlm_lowcomms_connect_node+0x14c/0x1f8 fs/dlm/lowcomms.c:558 lr : __find_con fs/dlm/lowcomms.c:274 [inline] lr : nodeid2con fs/dlm/lowcomms.c:305 [inline] lr : dlm_lowcomms_connect_node+0x114/0x1f8 fs/dlm/lowcomms.c:556 sp : ffff8000933b7b20 x29: ffff8000933b7b20 x28: 0000000000000002 x27: 0000000000000001 x26: ffff0000ee849000 x25: ffff0000ef82f480 x24: dfff800000000000 x23: 0000000000000000 x22: ffff80008e8f5c50 x21: 0000000000000002 x20: ffff800088ed2bc0 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff80008a7d6000 x16: 0000000000000003 x15: ffff80008a35fda0 x14: ffff80008a5d5e28 x13: ffff0000cf590000 x12: ffff0000cf590000 x11: 00000000000000c8 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff80008aa48520 x4 : 0000000000000004 x3 : 0000000000000001 x2 : ffff80008a468b28 x1 : ffff0000cf590000 x0 : 0000000000000000 Call trace: dlm_lowcomms_connect_node+0x14c/0x1f8 fs/dlm/lowcomms.c:558 (P) add_remote_member fs/dlm/member.c:313 [inline] dlm_add_member fs/dlm/member.c:334 [inline] dlm_recover_members+0xe98/0x1c48 fs/dlm/member.c:607 ls_recover fs/dlm/recoverd.c:151 [inline] do_ls_recovery fs/dlm/recoverd.c:360 [inline] dlm_recoverd+0x594/0x1d20 fs/dlm/recoverd.c:430 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 46 hardirqs last enabled at (45): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] hardirqs last enabled at (45): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:198 hardirqs last disabled at (46): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (42): [] dlm_create_root_list fs/dlm/recoverd.c:72 [inline] softirqs last enabled at (42): [] ls_recover fs/dlm/recoverd.c:141 [inline] softirqs last enabled at (42): [] do_ls_recovery fs/dlm/recoverd.c:360 [inline] softirqs last enabled at (42): [] dlm_recoverd+0x584/0x1d20 fs/dlm/recoverd.c:430 softirqs last disabled at (40): [] dlm_create_root_list fs/dlm/recoverd.c:65 [inline] softirqs last disabled at (40): [] ls_recover fs/dlm/recoverd.c:141 [inline] softirqs last disabled at (40): [] do_ls_recovery fs/dlm/recoverd.c:360 [inline] softirqs last disabled at (40): [] dlm_recoverd+0x474/0x1d20 fs/dlm/recoverd.c:430 ---[ end trace 0000000000000000 ]--- dlm: ls1: dlm_recover_members error -2 dlm: ls1: do_ls_recovery 15333067685668308026 error -2 dlm: ls1: dlm_recover 15333067685668308027 dlm: ls1: add member 1 dlm: ls1: dlm_recover_members 1 nodes dlm: ls1: generation 1 slots 1 1:1 dlm: ls1: dlm_recover_directory dlm: ls1: dlm_recover_directory 0 in 0 new dlm: ls1: dlm_recover 15333067685668308027 generation 1 done: 10 ms --- 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