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 14EBA28690 for ; Fri, 7 Aug 2026 00:00:36 +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=1786060838; cv=none; b=uucfAHZUJgDr9an+ANjQNpOs4xA9CJLYPf7FzmuQHTaAatHLMH6XLmQfyfCy4tUouVMpDRKbwq/dXqlmvCEdRrPDJycUh49LZFNa79BgUbh++PfeCldCmX5avwVp99Ejf0ijhszsebJFKA/eXIoS5s9ZYtalT0/KZMsUCIajXzs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786060838; c=relaxed/simple; bh=A/82UPe7Wl8AV+Y1N2mBt7PwmTi+Mi4cIfxgdux3cM8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ItPMbkT7oAluYwJmj9kKLQcT4nJIcZlbXBDh/bpsnVUQEZ2lQZMk/r2SXheMmMpj6Cv1pMlSY7MiBA250r3t/y1OICaPl3d8uT1k717szuhAESJpjWeT/CR+LI4ZtwAOCVPvkqU1vwm8CnmksNNEWq7QYzfnRrkiQ0wJRzvOtMo= 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 5614622812f47-4b19ce23e5cso30631b6e.1 for ; Thu, 06 Aug 2026 17:00:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786060836; x=1786665636; 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=EeVwARPoHgM/UIINZdBQHmw/RIEM96j5LkO43vmWrjM=; b=J5Ez3ehSry8FV+yxfVG6jfie4okrFIxbAXFQ8JOEeN4f6g0OdHajLqSoDw3VLjdJ2Z yen/VNdIL2CA1to4qmJYOguIKur0BljASG8kDPhMj7dw/S2qHuHEqNuVjV7pd8QghGRJ F/InlgoVgP7JeBpWCHtSc/NJrXP9nSuf0JuUr8YS/Fn+q8a1vRVarX5tyTjRo5bM2ktM 8OOPw6RkPDWNUy2S5z3KdJ3mWin39mSa+yjtThhAt9KG12+OBMizbViEbhtLHQnuYipF qVj/1UY6w3SjdINlk56VL4TSCPeWCkoVbdPe2k4SZ6yI2s/Apy2d9XstDfpgjNjvW1HC zluw== X-Forwarded-Encrypted: i=1; AHgh+RolV1eQ3Sl021FqsU3cc0adItAitI6XO2lTnkmsChF7bJb8haVSDRJsvSmOJGNP3eEa6ybTwmXEBlZRRns=@vger.kernel.org X-Gm-Message-State: AOJu0YyBU7cI8+0kZXnODXzD8QAuxfnpFG0B85QJtHBr7xy3zeiBWqaX hw2452RYSsC80CffcZi4q2CER73YPPiaCDO5+ddXKtE/FSUye92/zUUuFXlTD784/WXznWN+MFu 8MBxBH/7i1aodwF2ws+P1/iiODHHMWF+x509vWwuAiM5ZbLXZoUzA3ImsM0k= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1792:b0:487:530f:5754 with SMTP id 5614622812f47-4afae1a151bmr11910933b6e.20.1786060835881; Thu, 06 Aug 2026 17:00:35 -0700 (PDT) Date: Thu, 06 Aug 2026 17:00:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a752023.b50370da.49fe0.0016.GAE@google.com> Subject: [syzbot] [gfs2?] INFO: task hung in do_uevent 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: 848acc8ffe1b Merge tag 'fsverity-for-linus' of git://git.k.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=12237e32580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=b114bbe890d76037877c 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=132f5bb9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13737649580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/32c9dc084aaa/disk-848acc8f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b7604244b0a9/vmlinux-848acc8f.xz kernel image: https://storage.googleapis.com/syzbot-assets/4cd321f6fe47/bzImage-848acc8f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b114bbe890d76037877c@syzkaller.appspotmail.com INFO: task syz-executor291:5623 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor291 state:D stack:26184 pid:5623 tgid:5623 ppid:5622 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x125c/0x6730 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0xdd/0x2c0 kernel/sched/core.c:7326 do_uevent+0x427/0x530 fs/dlm/lockspace.c:206 new_lockspace fs/dlm/lockspace.c:583 [inline] __dlm_new_lockspace+0x1698/0x1fa0 fs/dlm/lockspace.c:638 dlm_new_user_lockspace+0x60/0x90 fs/dlm/lockspace.c:671 device_create_lockspace fs/dlm/user.c:414 [inline] device_write+0x930/0x1c90 fs/dlm/user.c:606 vfs_write+0x2aa/0x1050 fs/read_write.c:685 ksys_write+0x12a/0x250 fs/read_write.c:739 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: 0033:0x7faf45fdf6c9 RSP: 002b:00007ffc57d9a3a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000200000000000 RCX: 00007faf45fdf6c9 RDX: 0000000000000080 RSI: 0000200000000d00 RDI: 0000000000000005 RBP: 6769666e6f632f2e R08: 0000000000000006 R09: 0000000000000006 R10: 0000000000000006 R11: 0000000000000246 R12: 00007ffc57d9a518 R13: 0000200000000008 R14: 00007faf46072c40 R15: 0000000000000002 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8ebe8200 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8ebe8200 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffffffff8ebe8200 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775 5 locks held by kworker/u8:2/36: #0: ffff8880b843b520 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x140 kernel/sched/core.c:667 #1: ffff8880b8424568 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:218 [inline] #1: ffff8880b8424568 (psi_seq){-.-.}-{0:0}, at: __schedule+0x2e8e/0x6730 kernel/sched/core.c:7228 #2: ffff8880b8426298 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x124/0x1d0 kernel/time/timer.c:1004 #3: ffffffff9b978ca0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x144/0x4b0 lib/debugobjects.c:873 #4: ffffffff8ea99840 (text_mutex){+.+.}-{4:4}, at: arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:145 1 lock held by klogd/4968: #0: ffff8880b843b520 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x140 kernel/sched/core.c:667 2 locks held by getty/5376: #0: ffff8880357b10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x14e0 drivers/tty/n_tty.c:2211 1 lock held by syz-executor291/5623: #0: ffffffff9b7cf4c0 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xb8/0x1fa0 fs/dlm/lockspace.c:632 1 lock held by dlm_recoverd/5625: #0: ffff888079814a18 (&ls->ls_in_recovery){+.+.}-{4:4}, at: dlm_recoverd+0xbd/0x1f90 fs/dlm/recoverd.c:400 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:122 nmi_trigger_cpumask_backtrace+0x21c/0x2a0 lib/nmi_backtrace.c:65 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x141/0x190 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xcb1/0x1030 kernel/hung_task.c:561 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64 Code: d6 8b 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 5f 10 00 fb f4 3c 4a 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffffff8e807e10 EFLAGS: 00000246 RAX: 00000000000c7b8b RBX: ffffffff8e891480 RCX: ffffffff8bbb42d5 RDX: 0000000000000000 RSI: ffffffff8e1a8186 RDI: ffffffff8c402680 RBP: fffffbfff1d12290 R08: 0000000000000001 R09: ffffed101708678d R10: ffff8880b8433c6b R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 1ffffffff1d00fc6 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888123dd8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558a95fb1660 CR3: 000000000e994000 CR4: 00000000003526f0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline] default_idle+0x9/0x10 arch/x86/kernel/process.c:768 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:199 [inline] do_idle+0x3a7/0x5b0 kernel/sched/idle.c:355 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:454 rest_init+0x251/0x260 init/main.c:717 start_kernel+0x48e/0x490 init/main.c:1175 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x158 --- 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