IPVS: ftp: loaded support on port[0] = 21 INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 0, t=120002 jiffies, g=45446, c=45445, q=58) All QSes seen, last rcu_sched kthread activity 120002 (4295005086-4294885084), jiffies_till_next_fqs=3, root ->qsmask 0x0 syz-executor6 R running task 61408 13159 4565 0x00000008 Call Trace: sched_show_task+0x610/0x740 kernel/sched/core.c:5346 print_other_cpu_stall kernel/rcu/tree.c:1481 [inline] check_cpu_stall kernel/rcu/tree.c:1599 [inline] __rcu_pending kernel/rcu/tree.c:3356 [inline] rcu_pending kernel/rcu/tree.c:3401 [inline] rcu_check_callbacks+0x277a/0x2ae0 kernel/rcu/tree.c:2763 update_process_times+0x132/0x1a0 kernel/time/timer.c:1636 tick_sched_handle kernel/time/tick-sched.c:164 [inline] tick_sched_timer+0x3ba/0x520 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0xc54/0x1630 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt+0x6b/0x250 arch/x86/kernel/apic/apic.c:1025 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:866 RIP: 0010:msan_get_shadow_origin_ptr+0x20e/0x230 mm/kmsan/kmsan_instr.c:291 RSP: 0018:ffff880162c5f2d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: ffff88016344f378 RBX: 0000000000000003 RCX: ffff880000000000 RDX: ffff88016372f378 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 RBP: ffff880162c5f2e0 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff81174e40 R12: ffff880162c5f378 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000378 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:320 csd_lock_wait kernel/smp.c:108 [inline] smp_call_function_single+0x363/0x4e0 kernel/smp.c:302 smp_call_function_many+0x662/0xdf0 kernel/smp.c:434 native_flush_tlb_others+0x4e8/0x500 arch/x86/mm/tlb.c:595 flush_tlb_mm_range+0x32f/0x450 arch/x86/mm/tlb.c:644 tlb_flush_mmu_tlbonly+0x1ce/0x5f0 mm/memory.c:247 tlb_flush_mmu mm/memory.c:268 [inline] arch_tlb_finish_mmu mm/memory.c:284 [inline] tlb_finish_mmu+0x202/0x5c0 mm/memory.c:434 unmap_region+0x51a/0x580 mm/mmap.c:2573 do_munmap+0x1a2e/0x26c0 mm/mmap.c:2785 mmap_region+0x1500/0x3730 mm/mmap.c:1705 do_mmap+0x1902/0x2010 mm/mmap.c:1535 do_mmap_pgoff include/linux/mm.h:2236 [inline] vm_mmap_pgoff+0x31b/0x430 mm/util.c:357 ksys_mmap_pgoff+0x260/0xaf0 mm/mmap.c:1585 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0x1f1/0x260 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x455b29 RSP: 002b:00007efca8694c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007efca86956d4 RCX: 0000000000455b29 RDX: 0000000000000004 RSI: 0000000000aa1000 RDI: 0000000020000000 RBP: 000000000072c0b0 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000032 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c0070 R14: 00000000004cf508 R15: 0000000000000003 rcu_sched kthread starved for 120002 jiffies! g45446 c45445 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1 RCU grace-period kthread stack dump: rcu_sched R running task 61944 9 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2880 [inline] __schedule+0x651/0x770 kernel/sched/core.c:3524 schedule+0x1cc/0x2f0 kernel/sched/core.c:3568 schedule_timeout+0x3ef/0x580 kernel/time/timer.c:1801 rcu_gp_kthread+0x21e1/0x38d0 kernel/rcu/tree.c:2231 kthread+0x4db/0x6c0 kernel/kthread.c:241 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:413