rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (1 GPs behind) idle=bce/1/0x4000000000000004 softirq=75128/75130 fqs=3 rcu: (t=10501 jiffies g=91053 q=204) rcu: rcu_preempt kthread starved for 10496 jiffies! g91053 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt I22032 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_timeout+0x140/0x260 kernel/time/timer.c:1803 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1948 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2105 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 1 CPU: 1 PID: 7461 Comm: syz-executor0 Not tainted 4.20.0+ #363 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1c2/0x22c lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x16f/0x1bc kernel/rcu/tree.c:1211 print_cpu_stall.cold.68+0x218/0x40a kernel/rcu/tree.c:1348 check_cpu_stall kernel/rcu/tree.c:1422 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks+0xac1/0x1410 kernel/rcu/tree.c:2521 update_process_times+0x2d/0x70 kernel/time/timer.c:1635 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:161 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:__xfrm4_selector_match net/xfrm/xfrm_policy.c:193 [inline] RIP: 0010:xfrm_selector_match+0x5c0/0xf90 net/xfrm/xfrm_policy.c:219 Code: 00 e8 e4 6f ff fa e9 68 04 00 00 45 31 ff e8 e7 dd bb fa 44 89 f8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 d0 dd bb fa <48> 8d 7b 2a 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f RSP: 0018:ffff8880ae706c38 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: ffff88806076a080 RBX: ffff88809b677c08 RCX: ffffffff86c5c28f RDX: 0000000000000100 RSI: ffffffff86c5c820 RDI: 0000000000000003 RBP: ffff8880ae706c70 R08: ffff88806076a080 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88806076a080 R12: ffff8880ae707418 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000 xfrm_policy_match+0x1ef/0x2d0 net/xfrm/xfrm_policy.c:1894 __xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2022 [inline] xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline] xfrm_policy_lookup_bytype+0xa1a/0xe70 net/xfrm/xfrm_policy.c:2113 xfrm_policy_lookup+0x7e/0x80 net/xfrm/xfrm_policy.c:2145 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2939 [inline] xfrm_lookup_with_ifid+0x972/0x2b80 net/xfrm/xfrm_policy.c:3080 xfrm_lookup net/xfrm/xfrm_policy.c:3172 [inline] xfrm_lookup_route+0x3c/0x1f0 net/xfrm/xfrm_policy.c:3183 ip_route_output_flow+0xb1/0xc0 net/ipv4/route.c:2582 ip_route_output_ports include/net/route.h:161 [inline] igmpv3_newpack+0x541/0x1430 net/ipv4/igmp.c:362 add_grhead.isra.29+0x235/0x300 net/ipv4/igmp.c:433 add_grec+0x106b/0x1350 net/ipv4/igmp.c:566 igmpv3_send_cr net/ipv4/igmp.c:696 [inline] igmp_ifc_timer_expire+0x5d2/0xbe0 net/ipv4/igmp.c:793 call_timer_fn+0x272/0x920 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30c/0xb2e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:lock_acquire+0x268/0x520 kernel/locking/lockdep.c:3844 Code: 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 44 02 00 00 48 83 3d 37 2a 0e 08 00 0f 84 c3 01 00 00 48 8b bd 20 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 RSP: 0018:ffff88809d7ae760 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11013af5cf1 RCX: 0000000000000000 RDX: 1ffffffff12e4966 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff88809d7ae850 R08: ffff88806076a948 R09: 0000000000000008 R10: 0000000000000028 R11: ffff88806076a080 R12: ffff88806076a080 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:223 [inline] rcu_read_lock include/linux/rcupdate.h:607 [inline] lock_page_memcg+0x95/0x350 mm/memcontrol.c:1862 page_remove_file_rmap mm/rmap.c:1215 [inline] page_remove_rmap+0x855/0x1a30 mm/rmap.c:1300 zap_pte_range mm/memory.c:1091 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0xf52/0x25b0 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3156 __mmput kernel/fork.c:1050 [inline] mmput+0x247/0x610 kernel/fork.c:1071 exit_mm kernel/exit.c:545 [inline] do_exit+0xe74/0x26d0 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3ce65abcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 000000000073bfa8 RCX: 0000000000457ec9 RDX: 00000000004c1531 RSI: 0000000000000081 RDI: 000000000073bfac RBP: 000000000073bfa0 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000073bfac R13: 00007ffede58e0ff R14: 00007f3ce65ac9c0 R15: 000000000073bfac