netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. sch_fq: defrate 0 ignored. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. sch_fq: defrate 0 ignored. INFO: rcu_preempt self-detected stall on CPU[ 174.277258] INFO: rcu_sched detected stalls on CPUs/tasks: 0-...: (10501 ticks this GP) idle=b53/140000000000002/0 softirq=11935/11935 fqs=10501 (detected by 1, t=10502 jiffies, g=-8, c=-9, q=6) Task dump for CPU 0: kworker/u4:6 R running task 28800 7608 2 0x00000008 Workqueue: bat_events batadv_nc_worker ffff8800ab992018 ffff880127dc2088 0000000041b58ab3 ffffffff868facd7 ffffffff81391a70 ffff880000000000 ffffffff890091c0 ffffffff88065650 0000000000000000 ffffffff865907a0 ffff88012b038a00 ffffed002560714a Call Trace: INFO: rcu_preempt detected stalls on CPUs/tasks: 0-...: (10501 ticks this GP) idle=b53/140000000000002/0 softirq=11935/11935 fqs=0 (detected by 1, t=10502 jiffies, g=2119, c=2118, q=791) Task dump for CPU 0: kworker/u4:6 R running task 28800 7608 2 0x00000008 Workqueue: bat_events batadv_nc_worker ffff8800ab992018 ffff880127dc2088 0000000041b58ab3 ffffffff868facd7 ffffffff81391a70 ffff880000000000 ffffffff890091c0 ffffffff88065650 0000000000000000 ffffffff865907a0 ffff88012b038a00 ffffed002560714a Call Trace: rcu_preempt kthread starved for 10502 jiffies! g2119 c2118 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1 rcu_preempt S ffff88012b06fac8 29392 7 2 0x00000000 ffff88012b06fac8 ffff88012c020400 ffff88012c020d90 ffff88012c020d68 ffff88012c020418 ffff88012b05a188 1ffff10000000000 ffff8800abb28480 ffff88012b05a180 ffff88012b068000 ffffed002560d001 ffff88012b068008 Call Trace: [] schedule+0x9a/0x1c0 kernel/sched/core.c:3250 [] schedule_timeout+0x2e5/0x670 kernel/time/timer.c:1531 [] rcu_gp_kthread+0xee2/0x1f70 kernel/rcu/tree.c:2126 [] kthread+0x209/0x2d0 kernel/kthread.c:209 [] ret_from_fork+0x22/0x50 arch/x86/entry/entry_64.S:392 0-...: (10501 ticks this GP) idle=b53/140000000000002/0 softirq=11935/11935 fqs=39 (t=10541 jiffies g=2119 c=2118 q=791) Task dump for CPU 0: kworker/u4:6 R running task 28800 7608 2 0x00000008 Workqueue: bat_events batadv_nc_worker 0000000000000002 ffff88012c006700 ffffffff813d414c ffffffff81615a00 0000000041b58ab3 ffffffff868f20bf ffffffff813d3ec0 ffff88012c0066c0 ffffffff81483dd4 0000000000000000 ffffed0000000000 0000000000000317 Call Trace: [] sched_show_task+0x28c/0x400 kernel/sched/core.c:4976 [] dump_cpu_task+0x71/0x90 kernel/sched/core.c:8469 [] rcu_dump_cpu_stacks+0x191/0x290 kernel/rcu/tree.c:1246 [] print_cpu_stall kernel/rcu/tree.c:1353 [inline] [] check_cpu_stall kernel/rcu/tree.c:1417 [inline] [] __rcu_pending kernel/rcu/tree.c:3883 [inline] [] rcu_pending kernel/rcu/tree.c:3947 [inline] [] rcu_check_callbacks+0xde1/0x2010 kernel/rcu/tree.c:2772 [] update_process_times+0x34/0x60 kernel/time/timer.c:1420 [] tick_sched_handle.isra.19+0x44/0xe0 kernel/time/tick-sched.c:151 [] tick_sched_timer+0x64/0xd0 kernel/time/tick-sched.c:1178 [] __run_hrtimer kernel/time/hrtimer.c:1242 [inline] [] __hrtimer_run_queues+0x2d4/0xbf0 kernel/time/hrtimer.c:1306 [] hrtimer_interrupt+0x19d/0x470 kernel/time/hrtimer.c:1340 [] local_apic_timer_interrupt+0x6e/0xf0 arch/x86/kernel/apic/apic.c:907 [] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:931 [] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:621 [] dequeue_skb net/sched/sch_generic.c:103 [inline] [] qdisc_restart net/sched/sch_generic.c:223 [inline] [] __qdisc_run+0x15e/0x760 net/sched/sch_generic.c:239 [] __dev_xmit_skb net/core/dev.c:3073 [inline] [] __dev_queue_xmit+0xa0e/0x1f40 net/core/dev.c:3326 [] dev_queue_xmit+0xb/0x10 net/core/dev.c:3392 [] br_dev_queue_push_xmit+0x16b/0x540 net/bridge/br_forward.c:59 [] br_nf_dev_queue_xmit+0x1da/0x1780 net/bridge/br_netfilter_hooks.c:790 [] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline] [] NF_HOOK include/linux/netfilter.h:242 [inline] [] br_nf_post_routing+0x981/0xe30 net/bridge/br_netfilter_hooks.c:836 [] nf_iterate+0x13e/0x220 net/netfilter/core.c:274 [] nf_hook_slow+0x166/0x290 net/netfilter/core.c:306 [] nf_hook_thresh include/linux/netfilter.h:180 [inline] [] NF_HOOK_THRESH include/linux/netfilter.h:217 [inline] [] NF_HOOK include/linux/netfilter.h:242 [inline] [] br_forward_finish+0x110/0x180 net/bridge/br_forward.c:71 [] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline] [] br_nf_forward_finish+0x1ab/0x960 net/bridge/br_netfilter_hooks.c:566 [] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline] [] NF_HOOK include/linux/netfilter.h:242 [inline] [] br_nf_forward_ip+0x95c/0x1290 net/bridge/br_netfilter_hooks.c:633 [] nf_iterate+0x13e/0x220 net/netfilter/core.c:274 [] nf_hook_slow+0x166/0x290 net/netfilter/core.c:306 [] nf_hook_thresh include/linux/netfilter.h:180 [inline] [] NF_HOOK_THRESH include/linux/netfilter.h:217 [inline] [] NF_HOOK include/linux/netfilter.h:242 [inline] [] __br_forward+0x34d/0x4b0 net/bridge/br_forward.c:123 [] deliver_clone+0x4e/0xa0 net/bridge/br_forward.c:168 [] br_flood+0x28c/0x350 net/bridge/br_forward.c:227 [] br_flood_forward+0x14/0x20 net/bridge/br_forward.c:248 [] br_handle_frame_finish+0x79b/0x1e60 net/bridge/br_input.c:202 [] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline] [] br_nf_pre_routing_finish_ipv6+0x5ec/0xd30 net/bridge/br_netfilter_ipv6.c:210 [] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline] [] NF_HOOK include/linux/netfilter.h:242 [inline] [] br_nf_pre_routing_ipv6+0x31b/0x4c0 net/bridge/br_netfilter_ipv6.c:239 [] br_nf_pre_routing+0x9e8/0xf20 net/bridge/br_netfilter_hooks.c:493 [] nf_iterate+0x13e/0x220 net/netfilter/core.c:274 [] nf_hook_slow+0x166/0x290 net/netfilter/core.c:306 [] nf_hook_thresh include/linux/netfilter.h:180 [inline] [] NF_HOOK_THRESH include/linux/netfilter.h:217 [inline] [] NF_HOOK include/linux/netfilter.h:242 [inline] [] br_handle_frame+0x63a/0xf40 net/bridge/br_input.c:311 [] __netif_receive_skb_core+0x5bf/0x2d90 net/core/dev.c:4114 [] __netif_receive_skb+0x1f/0x150 net/core/dev.c:4198 [] process_backlog+0x26b/0x790 net/core/dev.c:4783 [] napi_poll net/core/dev.c:5087 [inline] [] net_rx_action+0x721/0xe70 net/core/dev.c:5152 [] __do_softirq+0x2cc/0xa06 kernel/softirq.c:273 [] invoke_softirq kernel/softirq.c:350 [inline] [] irq_exit+0x157/0x190 kernel/softirq.c:391 [] exiting_irq arch/x86/include/asm/apic.h:658 [inline] [] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:932 [] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:621 [] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:791 [inline] [] ? lock_release+0x7a4/0xd30 kernel/locking/lockdep.c:3730 [] rcu_lock_release include/linux/rcupdate.h:491 [inline] [] rcu_read_unlock include/linux/rcupdate.h:926 [inline] [] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:413 [inline] [] batadv_nc_worker+0x19c/0x7e0 net/batman-adv/network-coding.c:721 [] process_one_work+0x69b/0x1570 kernel/workqueue.c:2122 [] worker_thread+0xd7/0xf10 kernel/workqueue.c:2256 [] kthread+0x209/0x2d0 kernel/kthread.c:209 [] ret_from_fork+0x22/0x50 arch/x86/entry/entry_64.S:392