protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=cae/1/0x4000000000000004 softirq=64665/64667 fqs=14 (t=10500 jiffies g=76057 q=565) rcu: rcu_preempt kthread starved for 10472 jiffies! g76057 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29520 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xd9/0x260 kernel/sched/core.c:3947 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1807 rcu_gp_fqs_loop kernel/rcu/tree.c:1611 [inline] rcu_gp_kthread+0x9b2/0x18c0 kernel/rcu/tree.c:1768 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 29061 Comm: syz-executor.2 Not tainted 5.3.0 #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:1110 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:191 Code: 48 c7 c0 50 f4 d2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d e2 a8 94 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 4c 86 10 fa 65 8b 05 7d b2 c3 78 RSP: 0018:ffff8880ae809b80 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11a5e8a RBX: 0000000000000282 RCX: 1ffffffff134b5fe RDX: dffffc0000000000 RSI: ffffffff8178015e RDI: 0000000000000282 RBP: ffff8880ae809b90 R08: ffff888092cee2c0 R09: ffffed1015d04981 R10: ffffed1015d04980 R11: ffff8880ae824c03 R12: ffff8880ae824c00 R13: ffff8880ae824c00 R14: ffff8880ae824c00 R15: ffff8880ae824c00 __mod_timer kernel/time/timer.c:1053 [inline] mod_timer+0x507/0xc10 kernel/time/timer.c:1096 pie_timer+0x753/0x830 net/sched/sch_pie.c:454 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:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:xlate_dir.isra.0+0x9a/0x110 fs/proc/proc_sysctl.c:1061 Code: b1 98 ff 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 67 48 b8 00 00 00 00 00 fc ff df 48 8b 1b 48 89 da <48> c1 ea 03 80 3c 02 00 75 43 4c 8b 2b 4c 89 ef e8 c1 d2 5f 05 4c RSP: 0018:ffff8880367276f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff888057f27738 RCX: ffffc9000a3d7000 RDX: ffff888057f27738 RSI: ffffffff81d9d3c3 RDI: 0000000000000007 RBP: ffff888036727710 R08: ffff888092cee2c0 R09: ffffed1006ce4eed R10: ffffed1006ce4eec R11: 0000000000000003 R12: ffffffff88e9e448 R13: ffff8880605601c0 R14: ffff888057f271c0 R15: 0000000000000003 xlate_dir.isra.0+0x53/0x110 fs/proc/proc_sysctl.c:1058 xlate_dir.isra.0+0x53/0x110 fs/proc/proc_sysctl.c:1058 insert_links fs/proc/proc_sysctl.c:1243 [inline] insert_header+0x178/0xf80 fs/proc/proc_sysctl.c:233 get_subdir fs/proc/proc_sysctl.c:1031 [inline] __register_sysctl_table+0xbf4/0xef0 fs/proc/proc_sysctl.c:1360 register_net_sysctl+0x29/0x30 net/sysctl_net.c:121 __devinet_sysctl_register+0x17d/0x2c0 net/ipv4/devinet.c:2574 devinet_init_net+0x1d5/0x3c0 net/ipv4/devinet.c:2680 ops_init+0xb3/0x420 net/core/net_namespace.c:137 setup_net+0x2cc/0x880 net/core/net_namespace.c:334 copy_net_ns+0x290/0x41f net/core/net_namespace.c:475 create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:103 copy_namespaces+0x351/0x3f0 kernel/nsproxy.c:161 copy_process+0x2920/0x6b00 kernel/fork.c:2020 _do_fork+0x146/0xfa0 kernel/fork.c:2371 __do_sys_clone kernel/fork.c:2526 [inline] __se_sys_clone kernel/fork.c:2507 [inline] __x64_sys_clone+0x18d/0x250 kernel/fork.c:2507 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598e9 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc55dcb6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004598e9 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 000080314a110ffa RBP: 000000000075bf20 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc55dcb76d4 R13: 00000000004bfd7f R14: 00000000004d1b78 R15: 00000000ffffffff protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1