rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P14419 (detected by 0, t=10502 jiffies, g=84681, q=1007) task:syz.4.3762 state:R running task stack:23912 pid:14419 ppid: 13693 flags:0x00004008 Call Trace: sched_show_task+0x4a4/0x640 kernel/sched/core.c:8637 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:233 [inline] print_other_cpu_stall+0x1111/0x14d0 kernel/rcu/tree_stall.h:573 check_cpu_stall kernel/rcu/tree_stall.h:745 [inline] rcu_pending kernel/rcu/tree.c:3932 [inline] rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619 update_process_times+0x196/0x200 kernel/time/timer.c:1818 tick_sched_handle kernel/time/tick-sched.c:254 [inline] tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:169 [inline] RIP: 0010:unwind_next_frame+0x1fe/0x1fa0 arch/x86/kernel/unwind_orc.c:448 Code: 46 ff 39 e8 0f 86 a7 15 00 00 89 e8 48 8d 1c 85 d0 30 f5 8e 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 3d 17 00 00 44 8b 23 <89> e8 ff c0 48 8d 1c 85 d0 30 f5 8e 48 89 d8 48 c1 e8 03 0f b6 04 RSP: 0018:ffffc90000006ec8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8ef76a40 RCX: 000000000009607f RDX: dffffc0000000000 RSI: ffffffff818e5c7c RDI: 0000000000000001 RBP: 0000000000008e5c R08: 000000000000001f R09: ffffc90000007070 R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000001ebea R13: ffffffff818e5c7b R14: 000000000009607f R15: ffffc90000006f80 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 skb_clone+0x1bb/0x350 net/core/skbuff.c:1523 dev_queue_xmit_nit+0x2d6/0xae0 net/core/dev.c:2310 xmit_one net/core/dev.c:3612 [inline] dev_hard_start_xmit+0x137/0x7a0 net/core/dev.c:3633 __dev_queue_xmit+0x1cee/0x3230 net/core/dev.c:4248 neigh_output include/net/neighbour.h:509 [inline] ip6_finish_output2+0xee8/0x15a0 net/ipv6/ip6_output.c:130 dst_output include/net/dst.h:443 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xae0/0x13c0 net/ipv6/ndisc.c:511 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3959 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0x67c/0x890 kernel/time/timer.c:1767 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558 __do_softirq kernel/softirq.c:592 [inline] invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:641 irq_exit_rcu+0x5/0x20 kernel/softirq.c:653 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:raw_spin_rq_unlock_irq+0x19/0x80 kernel/sched/sched.h:1339 Code: 38 c1 7c cb 4c 89 f7 e8 45 88 70 00 eb c1 0f 1f 00 41 57 41 56 53 48 89 fb 66 90 48 89 df e8 4e 48 e4 08 e8 c9 3e 2d 00 fb 5b <41> 5e 41 5f c3 49 bf 00 00 00 00 00 fc ff df 4c 8d b3 58 0d 00 00 RSP: 0018:ffffc900032b7108 EFLAGS: 00000286 RAX: bf6b2a99d87ed600 RBX: ffff8880b903a300 RCX: ffffffff96868f03 RDX: dffffc0000000000 RSI: ffffffff8a8b2b00 RDI: ffffffff8ad904c0 RBP: ffffc900032b72f0 R08: ffffffff8186dcf8 R09: ffffed101720765a R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888021688000 R13: dffffc0000000000 R14: ffff888021688000 R15: ffff888021688080 __schedule+0x1462/0x45b0 kernel/sched/core.c:6379 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6549 preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6574 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34 __local_bh_enable_ip+0x175/0x1f0 kernel/softirq.c:390 rcu_read_unlock_bh include/linux/rcupdate.h:809 [inline] __dev_queue_xmit+0x1c56/0x3230 net/core/dev.c:4275 __bpf_tx_skb net/core/filter.c:2118 [inline] __bpf_redirect_no_mac net/core/filter.c:2152 [inline] __bpf_redirect+0x79c/0xe90 net/core/filter.c:2175 ____bpf_clone_redirect net/core/filter.c:2442 [inline] bpf_clone_redirect+0x249/0x360 net/core/filter.c:2414 bpf_prog_973cd02a7a0e8181+0x56/0xbe4 bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] bpf_test_run+0x3f4/0x8a0 net/bpf/test_run.c:119 bpf_prog_test_run_skb+0xb41/0x1420 net/bpf/test_run.c:669 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3368 __sys_bpf+0x3ac/0x670 kernel/bpf/syscall.c:4669 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline] __se_sys_bpf kernel/bpf/syscall.c:4753 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fba88827ff9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fba86ca0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fba889dff80 RCX: 00007fba88827ff9 RDX: 000000000000002c RSI: 0000000020000080 RDI: 000000000000000a RBP: 00007fba8889a296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fba889dff80 R15: 00007ffe8523cdd8