protocol 88fb is buggy, dev hsr_slave_1 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 INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=12250, c=12249, q=156) All QSes seen, last rcu_preempt kthread activity 10502 (4294995203-4294984701), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.4 R running task 27840 16247 7145 0x8000000c Call Trace: sched_show_task kernel/sched/core.c:5168 [inline] sched_show_task.cold+0x2f0/0x351 kernel/sched/core.c:5143 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline] check_cpu_stall kernel/rcu/tree.c:1616 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0xcb1/0xd0a kernel/rcu/tree.c:2792 update_process_times+0x31/0x70 kernel/time/timer.c:1590 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219 __run_hrtimer kernel/time/hrtimer.c:1220 [inline] __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1284 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1318 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:slab_alloc mm/slab.c:3375 [inline] RIP: 0010:kmem_cache_alloc+0x1d/0x780 mm/slab.c:3550 RSP: 0018:ffff8880aec078d0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: ffff88805416c680 RBX: 0000000003ffffff RCX: 1ffffffff0f819ac RDX: 0000000000000100 RSI: 0000000001080020 RDI: ffff8880a9e19900 RBP: ffff8880aec07938 R08: 0000000000000000 R09: ffff88805416cfc0 R10: ffff88805416cfa0 R11: ffff88805416c680 R12: ffff8880966ec1c0 R13: ffff8880a9e19900 R14: 0000000000000000 R15: 0000000001080020 skb_clone+0x129/0x320 net/core/skbuff.c:1282 dev_queue_xmit_nit+0x2da/0x940 net/core/dev.c:1943 xmit_one net/core/dev.c:3005 [inline] dev_hard_start_xmit+0xa7/0x8b0 net/core/dev.c:3025 __dev_queue_xmit+0x1d95/0x25e0 net/core/dev.c:3525 dev_queue_xmit+0x18/0x20 net/core/dev.c:3558 hsr_xmit net/hsr/hsr_forward.c:237 [inline] hsr_forward_do net/hsr/hsr_forward.c:295 [inline] hsr_forward_skb+0xbbe/0x1940 net/hsr/hsr_forward.c:373 protocol 88fb is buggy, dev hsr_slave_0 send_hsr_supervision_frame+0x892/0xec0 net/hsr/hsr_device.c:319 hsr_announce+0xf5/0x340 net/hsr/hsr_device.c:348 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x160/0x1b0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102 protocol 88fb is buggy, dev hsr_slave_1 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:325 [inline] RIP: 0010:PageSwapBacked include/linux/page-flags.h:288 [inline] RIP: 0010:mm_counter_file include/linux/mm.h:1530 [inline] RIP: 0010:mm_counter include/linux/mm.h:1539 [inline] RIP: 0010:mm_counter include/linux/mm.h:1535 [inline] RIP: 0010:zap_pte_range mm/memory.c:1341 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1444 [inline] RIP: 0010:zap_pud_range mm/memory.c:1473 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1494 [inline] RIP: 0010:unmap_page_range+0xa67/0x19f0 mm/memory.c:1515 RSP: 0018:ffff88807d63f780 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 1ffffd40002fd058 RBX: dffffc0000000000 RCX: ffff88807d63f990 RDX: 0000000000000000 RSI: ffff88807d63f990 RDI: ffffea00017e82c8 RBP: ffff88807d63f8c0 R08: ffff88807d63f9b8 R09: 0000000000000001 R10: 0000000000000000 R11: ffff88805416c680 R12: ffffea00017e82e0 R13: ffffea00017e82c0 R14: 00007f64944b8000 R15: ffffea00017e82c0 unmap_single_vma+0x15d/0x2c0 mm/memory.c:1560 unmap_vmas+0xac/0x170 mm/memory.c:1590 exit_mmap+0x285/0x4e0 mm/mmap.c:3062 __mmput kernel/fork.c:930 [inline] mmput+0x114/0x440 kernel/fork.c:951 exit_mm kernel/exit.c:545 [inline] do_exit+0x6fc/0x2c80 kernel/exit.c:841 do_group_exit+0x111/0x330 kernel/exit.c:951 get_signal+0x381/0x1cd0 kernel/signal.c:2413 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a919 RSP: 002b:00007f6493ea3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 000000000045a919 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000016 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6493ea46d4 R13: 00000000004c3ce8 R14: 00000000004d92f0 R15: 00000000ffffffff rcu_preempt kthread starved for 10502 jiffies! g12250 c12249 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_preempt R running task 29776 8 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1746 rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 protocol 88fb is buggy, dev hsr_slave_0 INFO: rcu_sched self-detected stall on CPU 0-...: (1 GPs behind) idle=9ba/140000000000002/0 softirq=42981/42988 fqs=18 (t=10503 jiffies g=7369 c=7368 q=6) rcu_sched kthread starved for 9567 jiffies! g7369 c7368 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1 rcu_sched R running task 29776 9 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1746 rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 NMI backtrace for cpu 0 CPU: 0 PID: 16247 Comm: syz-executor.4 Not tainted 4.14.159-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x142/0x197 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x141/0x189 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:158 [inline] rcu_dump_cpu_stacks+0x186/0x1d2 kernel/rcu/tree.c:1396 print_cpu_stall kernel/rcu/tree.c:1542 [inline] check_cpu_stall kernel/rcu/tree.c:1610 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0x43d/0xd0a kernel/rcu/tree.c:2792 update_process_times+0x31/0x70 kernel/time/timer.c:1590 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219 __run_hrtimer kernel/time/hrtimer.c:1220 [inline] __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1284 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1318 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:console_unlock+0x9f8/0xed0 kernel/printk/printk.c:2405 RSP: 0018:ffff8880aec07788 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: ffff88805416c680 RBX: 0000000000000200 RCX: 1ffff1100a82d9fd RDX: 0000000000000100 RSI: ffff88805416cfc8 RDI: 0000000000000206 RBP: ffff8880aec07818 R08: ffff88805416c680 R09: ffff88805416cfe8 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff83eb68b0 R14: ffffffff8859e530 R15: dffffc0000000000 vprintk_emit kernel/printk/printk.c:1923 [inline] vprintk_emit+0x1f9/0x600 kernel/printk/printk.c:1888 vprintk_default+0x28/0x30 kernel/printk/printk.c:1963 vprintk_func+0x5d/0x159 kernel/printk/printk_safe.c:401 printk+0x9e/0xbc kernel/printk/printk.c:1996 dev_queue_xmit_nit.cold+0x3f/0x4b net/core/dev.c:1957 xmit_one net/core/dev.c:3005 [inline] dev_hard_start_xmit+0xa7/0x8b0 net/core/dev.c:3025 __dev_queue_xmit+0x1d95/0x25e0 net/core/dev.c:3525 dev_queue_xmit+0x18/0x20 net/core/dev.c:3558 hsr_xmit net/hsr/hsr_forward.c:237 [inline] hsr_forward_do net/hsr/hsr_forward.c:295 [inline] hsr_forward_skb+0xbbe/0x1940 net/hsr/hsr_forward.c:373 send_hsr_supervision_frame+0x892/0xec0 net/hsr/hsr_device.c:319 hsr_announce+0xf5/0x340 net/hsr/hsr_device.c:348 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x160/0x1b0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:325 [inline] RIP: 0010:PageSwapBacked include/linux/page-flags.h:288 [inline] RIP: 0010:mm_counter_file include/linux/mm.h:1530 [inline] RIP: 0010:mm_counter include/linux/mm.h:1539 [inline] RIP: 0010:mm_counter include/linux/mm.h:1535 [inline] RIP: 0010:zap_pte_range mm/memory.c:1341 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1444 [inline] RIP: 0010:zap_pud_range mm/memory.c:1473 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1494 [inline] RIP: 0010:unmap_page_range+0xa67/0x19f0 mm/memory.c:1515 RSP: 0018:ffff88807d63f780 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 1ffffd40002fd058 RBX: dffffc0000000000 RCX: ffff88807d63f990 RDX: 0000000000000000 RSI: ffff88807d63f990 RDI: ffffea00017e82c8 RBP: ffff88807d63f8c0 R08: ffff88807d63f9b8 R09: 0000000000000001 R10: 0000000000000000 R11: ffff88805416c680 R12: ffffea00017e82e0 R13: ffffea00017e82c0 R14: 00007f64944b8000 R15: ffffea00017e82c0 unmap_single_vma+0x15d/0x2c0 mm/memory.c:1560 unmap_vmas+0xac/0x170 mm/memory.c:1590 exit_mmap+0x285/0x4e0 mm/mmap.c:3062 __mmput kernel/fork.c:930 [inline] mmput+0x114/0x440 kernel/fork.c:951 exit_mm kernel/exit.c:545 [inline] do_exit+0x6fc/0x2c80 kernel/exit.c:841 do_group_exit+0x111/0x330 kernel/exit.c:951 get_signal+0x381/0x1cd0 kernel/signal.c:2413 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a919 RSP: 002b:00007f6493ea3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 000000000045a919 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000016 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6493ea46d4 R13: 00000000004c3ce8 R14: 00000000004d92f0 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_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_0 net_ratelimit: 6 callbacks suppressed 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 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 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1