INFO: task iou-wrk-7045:7048 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:iou-wrk-7045    state:D stack:26664 pid:7048  tgid:7044  ppid:6208   task_flags:0x404150 flags:0x00080006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7326
 do_uevent+0x2c3/0x570 fs/dlm/lockspace.c:206
 new_lockspace fs/dlm/lockspace.c:583 [inline]
 __dlm_new_lockspace+0x17d1/0x1cd0 fs/dlm/lockspace.c:638
 device_create_lockspace+0xc7/0x350 fs/dlm/user.c:414
 device_write+0x872/0xed0 fs/dlm/user.c:606
 loop_rw_iter+0x426/0x690 include/linux/uio.h:-1
 io_write+0x11d5/0x1680 io_uring/rw.c:1184
 __io_issue_sqe+0x188/0x4d0 io_uring/io_uring.c:1395
 io_issue_sqe+0x16d/0x1020 io_uring/io_uring.c:1418
 io_wq_submit_work+0x7ab/0xc90 io_uring/io_uring.c:1534
 io_worker_handle_work+0x72e/0x10d0 io_uring/io-wq.c:652
 io_wq_worker+0x452/0xf10 io_uring/io-wq.c:706
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
1 lock held by kworker/1:2/803:
 #0: ffff8880b873b160 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2d/0x160 kernel/sched/core.c:667
2 locks held by getty/5376:
 #0: ffff888035b290a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
1 lock held by iou-wrk-7045/7048:
 #0: ffffffff9a86e800 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xa8/0x1cd0 fs/dlm/lockspace.c:632
1 lock held by dlm_recoverd/7055:
 #0: ffff888032546a18 (&ls->ls_in_recovery){+.+.}-{4:4}, at: dlm_recoverd+0xbc/0x2a00 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:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
 nmi_trigger_cpumask_backtrace+0x17a/0x380 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+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6153 Comm: kworker/u8:59 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: nvme-wq nvme_fc_connect_ctrl_work
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x0/0x90 kernel/kcov.c:320
Code: 11 10 48 89 74 11 18 48 89 44 11 20 e9 d4 29 49 ff cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d a8 38 a6 11 65 8b 15 c9 38 a6
RSP: 0018:ffffc90005e06d90 EFLAGS: 00000293
RAX: ffffffff8bcd1752 RBX: 000000000002ea2a RCX: ffff88802c9a0000
RDX: 0000000000000000 RSI: 000000000002ea2a RDI: 0000000005f5e0ff
RBP: ffffc90005e06ed8 R08: ffffc90005e06e57 R09: ffffc90005e06e40
R10: dffffc0000000000 R11: fffff52000bc0dcb R12: 00000006ffff0a00
R13: 000000000002ea2a R14: ffffc90005e06e40 R15: 0000000006ffff0a
FS:  0000000000000000(0000) GS:ffff888124f4b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562e81ccb168 CR3: 00000000359f1000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 put_dec+0x1f/0xe0 lib/vsprintf.c:306
 number+0x2d4/0xed0 lib/vsprintf.c:513
 vsnprintf+0x91b/0xef0 lib/vsprintf.c:2909
 sprintf+0xe7/0x140 lib/vsprintf.c:3112
 print_time kernel/printk/printk.c:1359 [inline]
 info_print_prefix+0x16b/0x360 kernel/printk/printk.c:1385
 record_print_text+0x181/0x4b0 kernel/printk/printk.c:1434
 printk_get_next_message+0x297/0x880 kernel/printk/printk.c:3072
 console_emit_next_record kernel/printk/printk.c:3137 [inline]
 console_flush_one_record kernel/printk/printk.c:3269 [inline]
 console_flush_all+0x4e3/0xaf0 kernel/printk/printk.c:3343
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413
 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479
 dev_vprintk_emit+0x338/0x400 drivers/base/core.c:4996
 dev_printk_emit+0xee/0x140 drivers/base/core.c:5007
 _dev_info+0x11e/0x180 drivers/base/core.c:5065
 nvme_fc_create_association drivers/nvme/host/fc.c:3050 [inline]
 nvme_fc_connect_ctrl_work+0x3de/0x13d0 drivers/nvme/host/fc.c:3387
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>