INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=26319, c=26318, q=1376) All QSes seen, last rcu_preempt kthread activity 10502 (4295018657-4295008155), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.5 R running task 27760 4080 6351 0x8000000c Call Trace: sched_show_task kernel/sched/core.c:5168 [inline] sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline] check_cpu_stall kernel/rcu/tree.c:1616 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0xd3f/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:__tcp_transmit_skb+0x1615/0x2dd0 net/ipv4/tcp_output.c:1131 RSP: 0018:ffff8880aea073e0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffff888092a4f040 RCX: 0000000000000000 RDX: ffff88809b379b78 RSI: 0000000000000000 RDI: ffff88808d653b80 RBP: ffff88809b379500 R08: 0000000000000000 R09: ffff88808d653b68 R10: ffffed1011aca76f R11: ffff88808d653b7f R12: ffff88808d653b40 R13: 0000000000000000 R14: ffff88809b379b78 R15: 0000000000000000 __tcp_send_ack.part.0+0x3ab/0x5a0 net/ipv4/tcp_output.c:3640 __tcp_send_ack net/ipv4/tcp_output.c:3646 [inline] tcp_send_ack+0x6f/0x90 net/ipv4/tcp_output.c:3646 __tcp_ack_snd_check+0xf6/0x380 net/ipv4/tcp_input.c:5145 tcp_rcv_established+0x1122/0x15d0 net/ipv4/tcp_input.c:5535 tcp_v4_do_rcv+0x55d/0x7e0 net/ipv4/tcp_ipv4.c:1467 tcp_v4_rcv+0x25ac/0x3250 net/ipv4/tcp_ipv4.c:1741 ip_local_deliver_finish+0x245/0xaa0 net/ipv4/ip_input.c:216 NF_HOOK include/linux/netfilter.h:250 [inline] NF_HOOK include/linux/netfilter.h:244 [inline] ip_local_deliver+0x1a6/0x450 net/ipv4/ip_input.c:257 dst_input include/net/dst.h:468 [inline] ip_rcv_finish+0x79b/0x1a10 net/ipv4/ip_input.c:396 NF_HOOK include/linux/netfilter.h:250 [inline] NF_HOOK include/linux/netfilter.h:244 [inline] ip_rcv+0x9d8/0xfec net/ipv4/ip_input.c:493 __netif_receive_skb_core+0x1e50/0x2c00 net/core/dev.c:4478 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4516 netif_receive_skb_internal+0xd7/0x580 net/core/dev.c:4589 napi_skb_finish net/core/dev.c:4950 [inline] napi_gro_receive+0x2ed/0x410 net/core/dev.c:4981 receive_buf+0x4e6/0x4480 drivers/net/virtio_net.c:852 virtnet_receive drivers/net/virtio_net.c:1098 [inline] virtnet_poll+0x4d3/0x9b3 drivers/net/virtio_net.c:1189 napi_poll net/core/dev.c:5599 [inline] net_rx_action+0x456/0xe90 net/core/dev.c:5665 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:lock_is_held_type+0x4b/0x210 kernel/locking/lockdep.c:4029 RSP: 0018:ffff8881fb96f5f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000000 RBX: ffff888087dc4300 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff888087dc4b84 RBP: ffffffff87d842e0 R08: 1ffff11012f56200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000008d334 R13: ffffea000234cd00 R14: ffffea000234cd20 R15: ffff88812fffb000 lock_is_held include/linux/lockdep.h:437 [inline] rcu_read_lock_sched_held+0x10a/0x130 kernel/rcu/update.c:116 trace_mm_page_free include/trace/events/kmem.h:151 [inline] trace_mm_page_free include/trace/events/kmem.h:151 [inline] free_pages_prepare mm/page_alloc.c:1023 [inline] free_pcp_prepare mm/page_alloc.c:1077 [inline] free_hot_cold_page+0x96b/0xca0 mm/page_alloc.c:2608 free_hot_cold_page_list+0x8f/0x310 mm/page_alloc.c:2656 release_pages+0x846/0xc00 mm/swap.c:820 tlb_flush_mmu_free+0x73/0x130 mm/memory.c:260 zap_pte_range mm/memory.c:1409 [inline] zap_pmd_range mm/memory.c:1444 [inline] zap_pud_range mm/memory.c:1473 [inline] zap_p4d_range mm/memory.c:1494 [inline] unmap_page_range+0x1308/0x1930 mm/memory.c:1515 unmap_single_vma+0x147/0x2b0 mm/memory.c:1560 unmap_vmas+0x9d/0x160 mm/memory.c:1590 exit_mmap+0x26d/0x4b0 mm/mmap.c:3056 __mmput kernel/fork.c:930 [inline] mmput+0x103/0x420 kernel/fork.c:951 exit_mm kernel/exit.c:545 [inline] do_exit+0x933/0x2b00 kernel/exit.c:845 do_group_exit+0x100/0x310 kernel/exit.c:955 get_signal+0x385/0x1ca0 kernel/signal.c:2423 do_signal+0x7c/0x1690 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x159/0x220 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c829 RSP: 002b:00007f8606077c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffea RBX: 00000000004da660 RCX: 000000000045c829 RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000006a R14: 00000000004c30b4 R15: 00007f86060786d4