rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ WARNING: CPU: 1 PID: 10630 at kernel/sched/core.c:3009 try_invoke_on_locked_down_task+0x18c/0x300 kernel/sched/core.c:3009 Modules linked in: CPU: 1 PID: 10630 Comm: kworker/1:9 Not tainted 5.10.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: wg-crypt-wg0 wg_packet_tx_worker RIP: 0010:try_invoke_on_locked_down_task+0x18c/0x300 kernel/sched/core.c:3009 Code: 00 00 00 0f 85 34 01 00 00 48 83 c4 70 44 89 f0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b 05 28 88 b5 7e 85 c0 0f 85 15 ff ff ff <0f> 0b e9 0e ff ff ff 48 8d 74 24 30 48 89 ef 49 c7 c6 00 4d 03 00 RSP: 0018:ffffc90000d90be8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 1ffff920001b217f RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff815cb860 RDI: ffff888024781a40 RBP: ffff888024781a40 R08: 0000000000000033 R09: ffff8880b9f2005b R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff815cb860 R13: ffffc90000d90d10 R14: ffff888024781a40 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000003101a98 CR3: 000000001bd41000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_print_task_stall kernel/rcu/tree_stall.h:267 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:475 [inline] check_cpu_stall kernel/rcu/tree_stall.h:634 [inline] rcu_pending kernel/rcu/tree.c:3694 [inline] rcu_sched_clock_irq.cold+0x97e/0xded kernel/rcu/tree.c:2567 update_process_times+0x77/0xd0 kernel/time/timer.c:1709 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1ce/0xea0 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097 asm_call_irq_on_stack+0xf/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0xbd/0x100 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:kvm_wait arch/x86/kernel/kvm.c:854 [inline] RIP: 0010:kvm_wait+0x9c/0xd0 arch/x86/kernel/kvm.c:831 Code: 02 48 89 da 83 e2 07 38 d0 7f 04 84 c0 75 32 0f b6 03 41 38 c4 75 13 e8 f2 66 46 00 e9 07 00 00 00 0f 00 2d 16 16 19 08 fb f4 df 66 46 00 eb af c3 e9 07 00 00 00 0f 00 2d 00 16 19 08 f4 eb RSP: 0018:ffffc90001a4f5f8 EFLAGS: 00000206 RAX: 000000000012e65c RBX: ffff888016d7e0f0 RCX: ffffffff81559727 RDX: 0000000000000000 RSI: 0000000000000803 RDI: 0000000000000000 RBP: 0000000000000246 R08: 0000000000000001 R09: ffffffff8ebac737 R10: fffffbfff1d758e6 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed1002dafc1e R14: 0000000000000001 R15: ffff8880b9f35a80 pv_wait arch/x86/include/asm/paravirt.h:564 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x8b8/0xb40 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:354 [inline] __dev_xmit_skb net/core/dev.c:3772 [inline] __dev_queue_xmit+0x17bb/0x2da0 net/core/dev.c:4108 neigh_hh_output include/net/neighbour.h:498 [inline] neigh_output include/net/neighbour.h:507 [inline] ip6_finish_output2+0x8db/0x16c0 net/ipv6/ip6_output.c:117 __ip6_finish_output net/ipv6/ip6_output.c:143 [inline] __ip6_finish_output+0x447/0xab0 net/ipv6/ip6_output.c:128 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:176 dst_output include/net/dst.h:441 [inline] ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:179 ip6tunnel_xmit include/net/ip6_tunnel.h:160 [inline] udp_tunnel6_xmit_skb+0x6a6/0xba0 net/ipv6/ip6_udp_tunnel.c:109 send6+0x4da/0xcb0 drivers/net/wireguard/socket.c:152 wg_socket_send_skb_to_peer+0xf5/0x220 drivers/net/wireguard/socket.c:177 wg_packet_create_data_done drivers/net/wireguard/send.c:252 [inline] wg_packet_tx_worker+0x2f9/0x980 drivers/net/wireguard/send.c:280 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296