INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 1, t=10502 jiffies, g=5310, c=5309, q=312) All QSes seen, last rcu_preempt kthread activity 10500 (4294976129-4294965629), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.3 R running task 27888 13088 7334 0x00000008 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:1223 [inline] __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321 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:seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline] RIP: 0010:ktime_get_with_offset+0x14f/0x320 kernel/time/timekeeping.c:803 RSP: 0018:ffff8880aed07878 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: ffff8880575282c0 RBX: 1ffffffff0fe2d28 RCX: 1ffff1100aea5176 RDX: 0000000000000100 RSI: ffff888057528c08 RDI: 0000000000000206 RBP: ffff8880aed078d0 R08: ffff8880575282c0 R09: ffff888057528bb0 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffffffff0fe2d2a R14: ffffffff87f95de8 R15: 0000000000000206 ktime_get_real include/linux/timekeeping.h:185 [inline] __net_timestamp include/linux/skbuff.h:3471 [inline] netif_rx_internal+0x584/0x820 net/core/dev.c:4033 dev_forward_skb+0x40/0x60 net/core/dev.c:1870 veth_xmit+0xf6/0x310 drivers/net/veth.c:114 __netdev_start_xmit include/linux/netdevice.h:4038 [inline] netdev_start_xmit include/linux/netdevice.h:4047 [inline] xmit_one net/core/dev.c:3009 [inline] dev_hard_start_xmit+0x18c/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:bit_spin_lock include/linux/bit_spinlock.h:27 [inline] RIP: 0010:hlist_bl_lock include/linux/list_bl.h:122 [inline] RIP: 0010:__d_rehash+0x65/0x2a0 fs/dcache.c:2435 RSP: 0018:ffff8880a97cfa70 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000002 RBX: ffffc9000034e270 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81948a53 RDI: 0000000000000001 RBP: ffff8880a97cfa90 R08: 0000000000002f83 R09: ffffffff895825d8 R10: ffff888057528b68 R11: ffff8880575282c0 R12: ffff8880a6f19600 R13: 0000000000000000 R14: ffff8880a6f19680 R15: 0000000000000063 __d_add fs/dcache.c:2630 [inline] d_add+0x41c/0x640 fs/dcache.c:2653 simple_lookup fs/libfs.c:68 [inline] simple_lookup+0xc5/0x110 fs/libfs.c:62 lookup_real fs/namei.c:1554 [inline] __lookup_hash fs/namei.c:1574 [inline] __lookup_hash+0x10b/0x180 fs/namei.c:1562 lookup_one_len+0x27b/0x3a0 fs/namei.c:2538 start_creating fs/debugfs/inode.c:314 [inline] start_creating+0xa6/0x1b0 fs/debugfs/inode.c:290 __debugfs_create_file+0x53/0x3d0 fs/debugfs/inode.c:353 debugfs_create_file+0x5a/0x70 fs/debugfs/inode.c:404 kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:622 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3298 [inline] kvm_dev_ioctl+0xe42/0x1620 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3321 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45af49 RSP: 002b:00007f30a3457c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f30a34586d4 R13: 00000000004c44de R14: 00000000004dae30 R15: 00000000ffffffff device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode device hsr_slave_1 left promiscuous mode device hsr_slave_0 left promiscuous mode team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Released all slaves device hsr_slave_1 left promiscuous mode device hsr_slave_0 left promiscuous mode team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 chnl_net:caif_netlink_parms(): no params data found bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_1 entered promiscuous mode bond0: Enslaving bond_slave_0 as an active interface with an up link bond0: Enslaving bond_slave_1 as an active interface with an up link chnl_net:caif_netlink_parms(): no params data found IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready team0: Port device team_slave_0 added IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready team0: Port device team_slave_1 added IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready device hsr_slave_0 entered promiscuous mode device hsr_slave_1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_1 entered promiscuous mode bond0: Enslaving bond_slave_0 as an active interface with an up link bond0: Enslaving bond_slave_1 as an active interface with an up link IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready team0: Port device team_slave_0 added IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready team0: Port device team_slave_1 added IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready device hsr_slave_0 entered promiscuous mode device hsr_slave_1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready bridge0: port 1(bridge_slave_0) entered disabled state bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state bridge0: port 2(bridge_slave_1) entered disabled state IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready