rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=aca/1/0x4000000000000004 softirq=13759/13760 fqs=5250 (t=10502 jiffies g=13865 q=2669) NMI backtrace for cpu 0 CPU: 0 PID: 10397 Comm: syz-executor.2 Not tainted 5.3.0-rc7+ #0 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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+0x183/0x1cf kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2736 [inline] rcu_sched_clock_irq.cold+0x4dd/0xc13 kernel/rcu/tree.c:2183 update_process_times+0x32/0x80 kernel/time/timer.c:1639 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1296 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1106 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1131 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:68 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x50 kernel/kcov.c:102 Code: 6d 9f e9 ff 48 c7 05 be 8c 39 09 00 00 00 00 e9 77 e9 ff ff 90 90 90 90 90 90 90 90 90 55 48 89 e5 65 48 8b 04 25 40 fe 01 00 <65> 8b 15 a4 88 8f 7e 81 e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 f0 RSP: 0018:ffff8880ae809508 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff888098afc500 RBX: ffff88808a251e38 RCX: ffffffff85c7dbb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff8880ae809508 R08: ffff888098afc500 R09: fffffbfff14e9755 R10: ffff888098afce80 R11: ffff888098afc500 R12: dffffc0000000000 R13: ffff88808a251b40 R14: ffff88808a251ed0 R15: 0000000000000000 hhf_dequeue+0x537/0xa20 net/sched/sch_hhf.c:435 dequeue_skb net/sched/sch_generic.c:258 [inline] qdisc_restart net/sched/sch_generic.c:361 [inline] __qdisc_run+0x1e7/0x19d0 net/sched/sch_generic.c:379 __dev_xmit_skb net/core/dev.c:3533 [inline] __dev_queue_xmit+0x16f1/0x3650 net/core/dev.c:3838 dev_queue_xmit+0x18/0x20 net/core/dev.c:3902 neigh_hh_output include/net/neighbour.h:500 [inline] neigh_output include/net/neighbour.h:509 [inline] ip6_finish_output2+0xf58/0x2520 net/ipv6/ip6_output.c:116 __ip6_finish_output+0x444/0xa50 net/ipv6/ip6_output.c:142 ip6_finish_output+0x38/0x1f0 net/ipv6/ip6_output.c:152 NF_HOOK_COND include/linux/netfilter.h:294 [inline] ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:175 dst_output include/net/dst.h:436 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] ndisc_send_skb+0xf29/0x1450 net/ipv6/ndisc.c:505 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:699 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3879 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x697/0x17a0 kernel/time/timer.c:1698 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1133 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:___might_sleep+0x13/0x280 kernel/sched/core.c:6566 Code: f2 88 e8 80 d0 5d 00 eb dd 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 89 f5 41 54 49 89 fc 53 <89> d3 e8 66 22 10 00 85 c0 74 0d 80 3d fb df 72 08 00 0f 84 c5 01 RSP: 0018:ffff88808eb8fb68 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff888098afc500 RBX: 0000000020000000 RCX: ffffffff819e8634 RDX: 0000000000000000 RSI: 0000000000001177 RDI: ffffffff87b48de0 RBP: ffff88808eb8fb90 R08: ffff888098afc500 R09: ffffed1015d06cd4 R10: ffffed1015d06cd3 R11: ffff8880ae83669b R12: ffffffff87b48de0 R13: 0000000000001177 R14: 0000000000000000 R15: 0000000000000000 process_huge_page mm/memory.c:4471 [inline] clear_huge_page+0xa0/0x3e0 mm/memory.c:4532 __do_huge_pmd_anonymous_page mm/huge_memory.c:582 [inline] do_huge_pmd_anonymous_page+0x776/0x1ad0 mm/huge_memory.c:760 create_huge_pmd mm/memory.c:3731 [inline] __handle_mm_fault+0x2d35/0x3f20 mm/memory.c:3935 handle_mm_fault+0x1b5/0x6b0 mm/memory.c:4001 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x536/0xdd0 arch/x86/mm/fault.c:1506 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1530 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1202 RIP: 0033:0x400644 Code: 06 e9 49 01 00 00 48 8b 44 24 10 48 0b 44 24 28 75 1f 48 8b 14 24 48 8b 7c 24 20 be 04 00 00 00 e8 c1 54 00 00 48 8b 74 24 08 <89> 06 e9 1e 01 00 00 48 8b 44 24 08 48 8b 14 24 be 04 00 00 00 8b RSP: 002b:00007fffea906e30 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000000 RBP: 0000000000760060 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000004388c0 R11: 0000000000000012 R12: 00000000004c5e3f R13: 000000000000012c R14: 0000000000760068 R15: fffffffffffffffe