======================================
| [  841.047731][   T12] ------------[ cut here ]------------
| [  841.048109][   T12] conntrack cleanup blocked for 60s
| [  841.048111][   T12] WARNING: net/netfilter/nf_conntrack_core.c:2511 at 0x0, CPU#3: kworker/u16:0/12
| [  841.048512][   T12] Modules linked in: sctp(+) xt_conntrack cls_matchall ip_gre ip6_gre gre sch_fq sch_prio xt_mark cls_basic sch_fq_codel vxlan nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables cls_bpf netdevsim psample act_mirred act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router act_gact cls_flower sch_ingress
[  841.049636][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  841.049821][   T12] Workqueue: netns cleanup_net
[  841.049973][   T12] RIP: 0010:nf_conntrack_cleanup_net_list (net/netfilter/nf_conntrack_core.c:2511 (discriminator 16)) nf_conntrack
[  841.050182][   T12] Code: 00 48 8b 54 24 18 48 8b 05 c3 a8 0a f3 48 81 c2 60 ea 00 00 48 39 c2 78 0a e8 42 2e fa f1 e9 25 fd ff ff 48 8d 3d 56 26 14 00 <67> 48 0f b9 3a eb e8 48 8b 5c 24 28 48 b8 00 00 00 00 00 fc ff df
All code
========
   0:	00 48 8b             	add    %cl,-0x75(%rax)
   3:	54                   	push   %rsp
   4:	24 18                	and    $0x18,%al
   6:	48 8b 05 c3 a8 0a f3 	mov    -0xcf5573d(%rip),%rax        # 0xfffffffff30aa8d0
   d:	48 81 c2 60 ea 00 00 	add    $0xea60,%rdx
  14:	48 39 c2             	cmp    %rax,%rdx
  17:	78 0a                	js     0x23
  19:	e8 42 2e fa f1       	call   0xfffffffff1fa2e60
  1e:	e9 25 fd ff ff       	jmp    0xfffffffffffffd48
  23:	48 8d 3d 56 26 14 00 	lea    0x142656(%rip),%rdi        # 0x142680
  2a:*	67 48 0f b9 3a       	ud1    (%edx),%rdi		<-- trapping instruction
  2f:	eb e8                	jmp    0x19
  31:	48 8b 5c 24 28       	mov    0x28(%rsp),%rbx
  36:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3d:	fc ff df 

Code starting with the faulting instruction
===========================================
   0:	67 48 0f b9 3a       	ud1    (%edx),%rdi
   5:	eb e8                	jmp    0xffffffffffffffef
   7:	48 8b 5c 24 28       	mov    0x28(%rsp),%rbx
   c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  13:	fc ff df 
[  841.050652][   T12] RSP: 0018:ffa00000000c7980 EFLAGS: 00010297
[  841.050835][   T12] RAX: 0000000100083fad RBX: ffa00000000c7af8 RCX: 0000000000000001
[  841.051031][   T12] RDX: 0000000100083fac RSI: 0000000000000004 RDI: ffffffffc08a9030
[  841.051223][   T12] RBP: 0000000000000001 R08: ffffffffc07667aa R09: ffe21c000175e70c
[  841.051415][   T12] R10: ffe21c000175e70d R11: 0000000000000001 R12: dffffc0000000000
[  841.051613][   T12] R13: ff1100000baf3860 R14: fffffbfff8116c07 R15: ff1100000c0ffa00
[  841.051840][   T12] FS:  0000000000000000(0000) GS:ff110000b758b000(0000) knlGS:0000000000000000
[  841.052057][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  841.052566][   T12] CR2: 00007f113ace5a48 CR3: 000000000f19c001 CR4: 0000000000771ef0
[  841.052763][   T12] PKRU: 55555554
[  841.052859][   T12] Call Trace:
[  841.052955][   T12]  <TASK>
[  841.053028][   T12]  ? nf_conntrack_cleanup_end (net/netfilter/nf_conntrack_core.c:2488) nf_conntrack
[  841.053185][   T12]  ? kfree (mm/slub.c:6663 (discriminator 3) mm/slub.c:6871 (discriminator 3))
[  841.053278][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 33) kernel/locking/lockdep.c:5831 (discriminator 33))
[  841.053406][   T12]  ? nf_conntrack_pernet_exit (net/netfilter/nf_conntrack_standalone.c:1129 (discriminator 4)) nf_conntrack
[  841.053562][   T12]  ops_undo_list (net/core/net_namespace.c:251 (discriminator 4))
[  841.053694][   T12]  ? netns_install (net/core/net_namespace.c:223)
[  841.053828][   T12]  cleanup_net (net/core/net_namespace.c:698)
[  841.053951][   T12]  ? process_one_work (kernel/workqueue.c:3233 (discriminator 1))
[  841.054076][   T12]  ? net_passive_dec (net/core/net_namespace.c:660)
[  841.054199][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
[  841.054321][   T12]  ? process_one_work (kernel/workqueue.c:3233 (discriminator 1))
[  841.054443][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 33) kernel/locking/lockdep.c:5831 (discriminator 33))
[  841.054562][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
[  841.054694][   T12]  process_one_work (kernel/workqueue.c:3262)
[  841.054826][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:3159)
[  841.054949][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870)
[  841.055073][   T12]  ? assign_work (kernel/workqueue.c:1200)
[  841.055197][   T12]  worker_thread (kernel/workqueue.c:3334 (discriminator 2) kernel/workqueue.c:3421 (discriminator 2))
[  841.055324][   T12]  ? process_one_work (kernel/workqueue.c:3367)
[  841.055446][   T12]  kthread (kernel/kthread.c:463)
[  841.055544][   T12]  ? kthread_is_per_cpu (kernel/kthread.c:412)
[  841.055666][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  841.055799][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
[  841.055921][   T12]  ? kthread_is_per_cpu (kernel/kthread.c:412)
[  841.056046][   T12]  ret_from_fork (arch/x86/kernel/process.c:164)
[  841.056168][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[  841.056320][   T12]  ? __switch_to (./include/linux/thread_info.h:140 (discriminator 2) arch/x86/kernel/process.h:16 (discriminator 2) arch/x86/kernel/process_64.c:676 (discriminator 2))
[  841.056446][   T12]  ? kthread_is_per_cpu (kernel/kthread.c:412)
[  841.056569][   T12]  ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
| [  841.056924][   T12] hardirqs last  enabled at (8777059): __up_console_sem (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 kernel/printk/printk.c:345)
| [  841.057140][   T12] hardirqs last disabled at (8777066): __up_console_sem (kernel/printk/printk.c:343 (discriminator 10))
| [  841.057359][   T12] softirqs last  enabled at (8776662): handle_softirqs (kernel/softirq.c:469 (discriminator 2) kernel/softirq.c:650 (discriminator 2))
| [  841.057574][   T12] softirqs last disabled at (8776657): irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723 kernel/softirq.c:739)
| [  841.057799][   T12] ---[ end trace 0000000000000000 ]---
[  984.491744][   T44] INFO: task modprobe:14864 blocked for more than 122 seconds.
[  984.492156][   T44]       Tainted: G        W           6.18.0-virtme #1
[  984.492327][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  984.492551][   T44] task:modprobe        state:D stack:25136 pid:14864 tgid:14864 ppid:37     task_flags:0x400100 flags:0x00080000
[  984.492876][   T44] Call Trace:
[  984.492986][   T44]  <TASK>
[  984.493061][   T44]  __schedule (kernel/sched/core.c:5259 kernel/sched/core.c:6863)
[  984.493201][   T44]  ? io_schedule_timeout (kernel/sched/core.c:6719)
[  984.493325][   T44]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  984.493451][   T44]  schedule (kernel/sched/core.c:6946 kernel/sched/core.c:6960)
[  984.493540][   T44]  schedule_preempt_disabled (kernel/sched/core.c:7018)
[  984.493659][   T44]  rwsem_down_write_slowpath (kernel/locking/rwsem.c:1187 (discriminator 7))
[  984.493788][   T44]  ? rwsem_down_read_slowpath (kernel/locking/rwsem.c:1112)
[  984.493910][   T44]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
[  984.494038][   T44]  ? perf_trace_sched_switch (kernel/sched/core.c:8785)
[  984.494162][   T44]  ? register_pernet_subsys (net/core/net_namespace.c:1430)
[  984.494280][   T44]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 33) kernel/locking/lockdep.c:5831 (discriminator 33))
[  984.494392][   T44]  down_write (kernel/locking/rwsem.c:1317 kernel/locking/rwsem.c:1326 kernel/locking/rwsem.c:1591)
[  984.494477][   T44]  ? rwsem_down_write_slowpath (kernel/locking/rwsem.c:1588)
[  984.494613][   T44]  ? _raw_spin_unlock (./include/linux/spinlock_api_smp.h:143 (discriminator 3) kernel/locking/spinlock.c:186 (discriminator 3))
[  984.494732][   T44]  ? __register_sysctl_table (fs/proc/proc_sysctl.c:1413)
[  984.494851][   T44]  register_pernet_subsys (net/core/net_namespace.c:1430)
[  984.494970][   T44] sctp_init (net/sctp/protocol.c:1600) sctp
[  984.495104][   T44]  ? gre_exit (net/ipv4/gre_demux.c:189) gre
[  984.495215][   T44]  do_one_initcall (init/main.c:1283)
[  984.495334][   T44]  ? trace_event_raw_event_initcall_level (init/main.c:1274)
[  984.495475][   T44]  ? kasan_unpoison (mm/kasan/shadow.c:156 mm/kasan/shadow.c:182)
[  984.495594][   T44]  do_init_module (kernel/module/main.c:3039)
[  984.496004][   T44]  ? free_module (kernel/module/main.c:3011)
[  984.496115][   T44]  ? backing_file_read_iter (fs/backing-file.c:210)
[  984.496228][   T44]  init_module_from_file (kernel/module/main.c:3712)
[  984.496338][   T44]  ? __do_sys_init_module (kernel/module/main.c:3677)
[  984.496454][   T44]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  984.496563][   T44]  ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[  984.496675][   T44]  idempotent_init_module (kernel/module/main.c:3724)
[  984.496797][   T44]  ? init_module_from_file (kernel/module/main.c:3716)
[  984.496910][   T44]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
[  984.497026][   T44]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 33) security/commoncap.c:130 (discriminator 33))
[  984.497138][   T44]  __x64_sys_finit_module (./include/linux/file.h:62 (discriminator 1) ./include/linux/file.h:83 (discriminator 1) kernel/module/main.c:3747 (discriminator 1) kernel/module/main.c:3734 (discriminator 1) kernel/module/main.c:3734 (discriminator 1))
[  984.497248][   T44]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))
[  984.497362][   T44]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)
[  984.497505][   T44] RIP: 0033:0x7fba6d0de34d
[  984.497624][   T44] RSP: 002b:00007ffdf632c668 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  984.497799][   T44] RAX: ffffffffffffffda RBX: 0000560b81ef0b10 RCX: 00007fba6d0de34d
[  984.497965][   T44] RDX: 0000000000000000 RSI: 0000560b61e1af2e RDI: 0000000000000000
[  984.498139][   T44] RBP: 00007ffdf632c700 R08: 0000000000000000 R09: 0000000000000000
[  984.498306][   T44] R10: 0000000000000000 R11: 0000000000000246 R12: 0000560b61e1af2e


Finger prints:
nf_conntrack_cleanup_net_list:ops_undo_list:cleanup_net:process_one_work:worker_thread
__up_console_sem:__up_console_sem:handle_softirqs:irq_exit_rcu:__schedule