nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 0, t=100002 jiffies, g=23246, c=23245, q=176) All QSes seen, last rcu_sched kthread activity 100002 (4294978911-4294878909), jiffies_till_next_fqs=3, root ->qsmask 0x0 syz-executor5 R running task 58944 8814 4481 0x00000008 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:rep_nop arch/x86/include/asm/processor.h:658 [inline] RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:663 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x367/0x4e0 kernel/smp.c:302 Code: fe ff ff 8b 3a e8 59 8e 6b 00 45 85 f6 0f 84 6d ff ff ff 41 89 de eb 10 90 66 2e 0f 1f 84 00 00 00 00 00 e8 3b 32 12 00 f3 90 <8b> 5c 24 78 4c 89 e7 e8 bd 84 6b 00 8b 00 83 e0 01 83 e3 01 85 c0 RSP: 0018:ffff88012401f340 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff81535185 RBX: 0000000000000001 RCX: 0000000000040000 RDX: ffffc90002915000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffff88012401f410 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff81174df0 R12: ffff88012401f3b8 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88012f4cc3f8 smp_call_function_many+0x658/0xdb0 kernel/smp.c:434 smp_call_function kernel/smp.c:492 [inline] on_each_cpu+0xd2/0x160 kernel/smp.c:602 flush_tlb_kernel_range+0x161/0x1e0 arch/x86/mm/tlb.c:683 __purge_vmap_area_lazy+0x1f7/0x3b0 mm/vmalloc.c:677 vm_unmap_aliases+0x635/0x6d0 mm/vmalloc.c:1109 change_page_attr_set_clr+0x587/0x1dd0 arch/x86/mm/pageattr.c:1473 change_page_attr_clear arch/x86/mm/pageattr.c:1533 [inline] set_memory_ro+0xcc/0x100 arch/x86/mm/pageattr.c:1762 bpf_jit_binary_lock_ro include/linux/filter.h:690 [inline] bpf_int_jit_compile+0x80b3/0x8590 arch/x86/net/bpf_jit_comp.c:1168 bpf_prog_select_runtime+0x953/0x9f0 kernel/bpf/core.c:1498 bpf_prog_load kernel/bpf/syscall.c:1358 [inline] __do_sys_bpf+0xc8cd/0xe570 kernel/bpf/syscall.c:2307 __se_sys_bpf kernel/bpf/syscall.c:2269 [inline] __x64_sys_bpf+0xda/0x110 kernel/bpf/syscall.c:2269 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f0185f35c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f0185f366d4 RCX: 0000000000457089 RDX: 0000000000000048 RSI: 0000000020000340 RDI: 0000000000000005 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cb328 R14: 00000000004c3028 R15: 0000000000000000 rcu_sched kthread starved for 100002 jiffies! g23246 c23245 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1 RCU grace-period kthread stack dump: rcu_sched R running task 61848 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