INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 0, t=100002 jiffies, g=34622, c=34621, q=10) All QSes seen, last rcu_sched kthread activity 100002 (4295033804-4294933802), jiffies_till_next_fqs=3, root ->qsmask 0x0 kworker/u4:5 R running task 56080 228 2 0x80000008 Workqueue: netns cleanup_net Call Trace: sched_show_task+0x600/0x730 kernel/sched/core.c:5332 print_other_cpu_stall kernel/rcu/tree.c:1441 [inline] check_cpu_stall kernel/rcu/tree.c:1559 [inline] __rcu_pending kernel/rcu/tree.c:3244 [inline] rcu_pending kernel/rcu/tree.c:3291 [inline] rcu_check_callbacks+0x2627/0x2990 kernel/rcu/tree.c:2646 update_process_times+0x132/0x1a0 kernel/time/timer.c:1636 tick_sched_handle kernel/time/tick-sched.c:164 [inline] tick_sched_timer+0x3a6/0x500 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0xbfc/0x15b0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x458/0x13d0 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt+0x6b/0x250 arch/x86/kernel/apic/apic.c:1028 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:868 RIP: 0010:msan_get_shadow_origin_ptr+0x187/0x2e0 mm/kmsan/kmsan_instr.c:293 Code: 8b 45 c8 48 89 45 b0 ff 75 b0 9d 48 8b 7d d0 48 8b 47 40 48 85 c0 0f 84 da 00 00 00 45 89 fd 41 81 e5 ff 0f 00 00 4b 8d 0c 2c <48> 83 c1 ff 48 81 f9 01 10 00 00 72 21 48 89 7d d0 31 d2 4c 89 ff RSP: 0018:ffff8801d3b2f7d0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: ffffea000af72da0 RBX: ffffffff8a1af000 RCX: 00000000000008bc RDX: 0000000000000740 RSI: 0000000000000000 RDI: ffffea000af631a0 RBP: ffff8801d3b2f820 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff81174df0 R12: 0000000000000004 R13: 00000000000008b8 R14: ffffffff8a1ae000 R15: ffff8801d3b2f8b8 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:349 csd_lock_wait kernel/smp.c:108 [inline] smp_call_function_single+0x373/0x4e0 kernel/smp.c:302 _rcu_barrier+0x470/0x720 kernel/rcu/tree.c:3434 rcu_barrier_sched kernel/rcu/tree.c:3474 [inline] rcu_barrier+0x1c/0x20 kernel/rcu/tree_plugin.h:933 netdev_run_todo+0x186/0x14d0 net/core/dev.c:8230 rtnl_unlock+0x13/0x20 net/core/rtnetlink.c:117 ip_tunnel_delete_nets+0x68a/0x6a0 net/ipv4/ip_tunnel.c:1074 vti_exit_batch_net+0x6c/0x80 net/ipv4/ip_vti.c:447 ops_exit_list net/core/net_namespace.c:155 [inline] cleanup_net+0xbbb/0x16c0 net/core/net_namespace.c:523 process_one_work+0x1605/0x1f40 kernel/workqueue.c:2153 worker_thread+0x11a2/0x2590 kernel/workqueue.c:2296 kthread+0x44d/0x480 kernel/kthread.c:247 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:415 rcu_sched kthread starved for 100002 jiffies! g34622 c34621 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1 RCU grace-period kthread stack dump: rcu_sched R running task 61928 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2857 [inline] __schedule+0x667/0x770 kernel/sched/core.c:3507 schedule+0x1bc/0x2d0 kernel/sched/core.c:3551 schedule_timeout+0x3f0/0x580 kernel/time/timer.c:1801 rcu_gp_kthread+0x1da1/0x3850 kernel/rcu/tree.c:2179 kthread+0x44d/0x480 kernel/kthread.c:247 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:415