rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=6765, q=414) rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4294954207-4294943706), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.3 R running task 24616 8494 8492 0x0000400a Call Trace: sched_show_task+0x40f/0x560 kernel/sched/core.c:5954 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline] check_cpu_stall kernel/rcu/tree_stall.h:538 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq+0x1861/0x1ad0 kernel/rcu/tree.c:2271 update_process_times+0x12d/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:167 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:mod_memcg_page_state+0x6/0x190 include/linux/memcontrol.h:652 Code: 60 00 eb 0c e8 eb 27 2e 00 eb 05 e8 e4 27 2e 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 44 00 00 55 48 89 e5 41 57 <41> 56 41 54 53 41 89 f6 48 89 fb e8 ba 27 2e 00 48 83 c3 38 48 89 RSP: 0018:ffffc90002a36ff8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11011e129c1 RBX: ffff88808f094e08 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0002a3fb00 RBP: ffffc90002a37000 R08: 000000000003a728 R09: fffffbfff124248a R10: fffffbfff124248a R11: 0000000000000000 R12: ffff88808f094ea0 R13: dffffc0000000000 R14: 1ffff11011e129d4 R15: ffff8880983cd538 free_thread_stack+0x168/0x590 kernel/fork.c:280 release_task_stack kernel/fork.c:440 [inline] put_task_stack+0xa3/0x130 kernel/fork.c:451 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256 context_switch kernel/sched/core.c:3388 [inline] __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081 preempt_schedule_common kernel/sched/core.c:4236 [inline] preempt_schedule+0xdb/0x120 kernel/sched/core.c:4261 ___preempt_schedule+0x16/0x18 arch/x86/entry/thunk_64.S:50 __local_bh_enable_ip+0x17d/0x240 kernel/softirq.c:196 __raw_write_unlock_bh include/linux/rwlock_api_smp.h:275 [inline] _raw_write_unlock_bh+0x2f/0x40 kernel/locking/spinlock.c:351 neigh_changeaddr+0x38/0x40 net/core/neighbour.c:344 arp_netdev_event+0x68/0x160 net/ipv4/arp.c:1247 notifier_call_chain kernel/notifier.c:83 [inline] __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0xec/0x190 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:1893 [inline] call_netdevice_notifiers_extack net/core/dev.c:1905 [inline] call_netdevice_notifiers net/core/dev.c:1919 [inline] dev_set_mac_address+0x2be/0x3f0 net/core/dev.c:8355 do_setlink+0x71c/0x3960 net/core/rtnetlink.c:2546 __rtnl_newlink net/core/rtnetlink.c:3238 [inline] rtnl_newlink+0x14dd/0x1bd0 net/core/rtnetlink.c:3363 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5424 netlink_rcv_skb+0x19e/0x3d0 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5442 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x767/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa31/0xd50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg net/socket.c:659 [inline] __sys_sendto+0x442/0x5e0 net/socket.c:1985 __do_sys_sendto net/socket.c:1997 [inline] __se_sys_sendto net/socket.c:1993 [inline] __x64_sys_sendto+0xe5/0x100 net/socket.c:1993 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x414c43 Code: ff 0f 83 b0 19 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 2d 38 66 00 00 75 17 49 89 ca b8 2c 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 81 19 00 00 c3 48 83 ec 08 e8 87 fa ff ff RSP: 002b:00007fff70d7b3b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000a72200 RCX: 0000000000414c43 RDX: 000000000000002c RSI: 0000000000a72250 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff70d7b3c0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000a72250 R15: 0000000000000003 rcu: rcu_preempt kthread starved for 10545 jiffies! g6765 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29104 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline] rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352