[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.77' (ECDSA) to the list of known hosts. syzkaller login: [ 385.566844][ T6860] IPVS: ftp: loaded support on port[0] = 21 [ 385.669196][ T6860] chnl_net:caif_netlink_parms(): no params data found [ 385.720887][ T6860] bridge0: port 1(bridge_slave_0) entered blocking state [ 385.729728][ T6860] bridge0: port 1(bridge_slave_0) entered disabled state [ 385.738387][ T6860] device bridge_slave_0 entered promiscuous mode [ 385.746964][ T6860] bridge0: port 2(bridge_slave_1) entered blocking state [ 385.754145][ T6860] bridge0: port 2(bridge_slave_1) entered disabled state [ 385.762372][ T6860] device bridge_slave_1 entered promiscuous mode [ 385.783265][ T6860] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 385.794013][ T6860] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 385.816414][ T6860] team0: Port device team_slave_0 added [ 385.823921][ T6860] team0: Port device team_slave_1 added [ 385.842986][ T6860] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 385.850128][ T6860] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 385.877693][ T6860] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 385.890357][ T6860] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 385.898733][ T6860] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 385.924742][ T6860] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 385.952788][ T6860] device hsr_slave_0 entered promiscuous mode [ 385.959541][ T6860] device hsr_slave_1 entered promiscuous mode [ 386.056510][ T6860] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 386.066523][ T6860] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 386.076636][ T6860] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 386.086752][ T6860] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 386.110128][ T6860] bridge0: port 2(bridge_slave_1) entered blocking state [ 386.117263][ T6860] bridge0: port 2(bridge_slave_1) entered forwarding state [ 386.125036][ T6860] bridge0: port 1(bridge_slave_0) entered blocking state [ 386.132117][ T6860] bridge0: port 1(bridge_slave_0) entered forwarding state [ 386.178716][ T6860] 8021q: adding VLAN 0 to HW filter on device bond0 [ 386.191427][ T6990] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 386.202727][ T6990] bridge0: port 1(bridge_slave_0) entered disabled state [ 386.211760][ T6990] bridge0: port 2(bridge_slave_1) entered disabled state [ 386.220151][ T6990] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 386.232432][ T6860] 8021q: adding VLAN 0 to HW filter on device team0 [ 386.244055][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 386.252940][ T6852] bridge0: port 1(bridge_slave_0) entered blocking state [ 386.260056][ T6852] bridge0: port 1(bridge_slave_0) entered forwarding state [ 386.275951][ T6990] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 386.284316][ T6990] bridge0: port 2(bridge_slave_1) entered blocking state [ 386.291982][ T6990] bridge0: port 2(bridge_slave_1) entered forwarding state [ 386.316013][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 386.324443][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 386.333735][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 386.342447][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 386.353136][ T6860] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 386.361640][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 386.379018][ T6990] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 386.387160][ T6990] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 386.400475][ T6860] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 386.427761][ T7070] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 386.441056][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 386.451201][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 386.459102][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 386.468446][ T6860] device veth0_vlan entered promiscuous mode [ 386.482283][ T6860] device veth1_vlan entered promiscuous mode [ 386.503510][ T6990] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 386.512250][ T6990] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 386.521110][ T6990] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 386.533195][ T6860] device veth0_macvtap entered promiscuous mode [ 386.543807][ T6860] device veth1_macvtap entered promiscuous mode [ 386.561385][ T6860] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 386.569217][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 386.579353][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 386.590910][ T6860] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 386.600492][ T7070] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 386.611841][ T6860] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 386.621236][ T6860] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 386.630305][ T6860] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 386.639449][ T6860] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 386.681320][ C1] hrtimer: interrupt took 2866862 ns [ 416.554874][ T0] NOHZ: local_softirq_pending 08 [ 421.627722][ T6869] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 437.035019][ T0] NOHZ: local_softirq_pending 08 [ 457.513041][ T0] NOHZ: local_softirq_pending 08 [ 477.991917][ T0] NOHZ: local_softirq_pending 08 [ 498.469063][ T0] NOHZ: local_softirq_pending 08 [ 526.553571][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 526.560656][ C0] rcu: 1-...!: (1 GPs behind) idle=786/1/0x4000000000000000 softirq=9770/9781 fqs=1 [ 526.570470][ C0] (detected by 0, t=10502 jiffies, g=8481, q=298) [ 526.576970][ C0] Sending NMI from CPU 0 to CPUs 1: [ 526.584333][ C0] NMI backtrace for cpu 1 [ 526.584340][ C0] CPU: 1 PID: 7070 Comm: kworker/1:3 Not tainted 5.9.0-rc3-syzkaller #0 [ 526.584349][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 526.584354][ C0] Workqueue: ipv6_addrconf addrconf_dad_work [ 526.584362][ C0] RIP: 0010:__lock_acquire+0xf4f/0x5570 [ 526.584378][ C0] Code: ff ff 48 c7 c6 e0 d1 4b 88 48 c7 c7 20 a8 4b 88 e8 18 3d eb ff 0f 0b e9 31 fe ff ff 48 63 5c 24 10 be 08 00 00 00 48 8d 43 3f <48> 85 db 48 0f 49 c3 48 c1 f8 06 48 8d 3c c5 e0 49 5f 8c e8 f9 1d [ 526.584383][ C0] RSP: 0018:ffffc90000da8b28 EFLAGS: 00000046 [ 526.584393][ C0] RAX: 00000000000006b6 RBX: 0000000000000677 RCX: 0000000000000008 [ 526.584400][ C0] RDX: 0000000000000004 RSI: 0000000000000008 RDI: ffffffff8c63f3d8 [ 526.584407][ C0] RBP: ffff88808dfd4a90 R08: 0000000000000000 R09: ffffffff8c5f4aaf [ 526.584414][ C0] R10: fffffbfff18be955 R11: 0000000000000001 R12: 0000000000000000 [ 526.584421][ C0] R13: ffff88808dfd4ab2 R14: ffff88808dfd4040 R15: 0000000000000000 [ 526.584428][ C0] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 526.584434][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 526.584441][ C0] CR2: 00000000004c9588 CR3: 0000000009a8d000 CR4: 00000000001506e0 [ 526.584448][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 526.584462][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 526.584465][ C0] Call Trace: [ 526.584468][ C0] [ 526.584474][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 526.584478][ C0] ? find_held_lock+0x2d/0x110 [ 526.584482][ C0] lock_acquire+0x1f3/0xae0 [ 526.584487][ C0] ? advance_sched+0x4f/0x990 [ 526.584491][ C0] ? lock_release+0x8f0/0x8f0 [ 526.584496][ C0] ? lock_is_held_type+0xbb/0xf0 [ 526.584500][ C0] ? find_held_lock+0x2d/0x110 [ 526.584505][ C0] ? __hrtimer_run_queues+0x5d1/0xfc0 [ 526.584509][ C0] _raw_spin_lock+0x2a/0x40 [ 526.584514][ C0] ? advance_sched+0x4f/0x990 [ 526.584518][ C0] advance_sched+0x4f/0x990 [ 526.584523][ C0] __hrtimer_run_queues+0x6a9/0xfc0 [ 526.584528][ C0] ? taprio_dequeue_soft+0xa40/0xa40 [ 526.584533][ C0] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 526.584538][ C0] ? ktime_get_update_offsets_now+0x1c4/0x250 [ 526.584543][ C0] hrtimer_interrupt+0x32a/0x930 [ 526.584548][ C0] __sysvec_apic_timer_interrupt+0x142/0x5e0 [ 526.584553][ C0] asm_call_on_stack+0xf/0x20 [ 526.584556][ C0] [ 526.584561][ C0] sysvec_apic_timer_interrupt+0xb2/0xf0 [ 526.584566][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 526.584571][ C0] RIP: 0010:call_rcu+0x3ac/0x7b0 [ 526.584586][ C0] Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 b9 02 00 00 48 83 3d a8 b0 54 08 00 0f 84 1b 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 80 3c [ 526.584591][ C0] RSP: 0018:ffffc900061171c8 EFLAGS: 00000282 [ 526.584601][ C0] RAX: 1ffffffff136c789 RBX: ffff888092757bd8 RCX: 0000000000000002 [ 526.584607][ C0] RDX: dffffc0000000000 RSI: 0000000000000402 RDI: 0000000000000282 [ 526.584614][ C0] RBP: ffff8880ae736ca8 R08: 0000000000000001 R09: ffffffff8c5f4a8f [ 526.584621][ C0] R10: fffffbfff18be951 R11: 000000000000016e R12: ffff8880ae736c00 [ 526.584628][ C0] R13: ffff8880ae736c98 R14: ffff8880ae736c50 R15: 0000000000000033 [ 526.584632][ C0] ? kfree_skb+0x7d/0x100 [ 526.584636][ C0] dst_release+0x79/0xe0 [ 526.584641][ C0] skb_release_head_state+0x1f9/0x250 [ 526.584646][ C0] kfree_skb.part.0+0x89/0x350 [ 526.584650][ C0] kfree_skb+0x7d/0x100 [ 526.584655][ C0] ? __ip6_route_redirect+0xb50/0xb50 [ 526.584659][ C0] ip_tunnel_xmit+0x6ab/0x2ac3 [ 526.584664][ C0] ? ip_md_tunnel_xmit+0x15b0/0x15b0 [ 526.584670][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 526.584674][ C0] ? skb_push+0x97/0xc0 [ 526.584678][ C0] ? __gre_xmit+0x535/0x8f0 [ 526.584682][ C0] erspan_xmit+0x1109/0x2760 [ 526.584687][ C0] dev_hard_start_xmit+0x193/0x950 [ 526.584691][ C0] sch_direct_xmit+0x2e1/0xbd0 [ 526.584696][ C0] ? dev_watchdog+0xc80/0xc80 [ 526.584701][ C0] ? pfifo_fast_dequeue+0x5a1/0xb20 [ 526.584705][ C0] ? lock_is_held_type+0xbb/0xf0 [ 526.584709][ C0] __qdisc_run+0x4b9/0x1620 [ 526.584714][ C0] __dev_queue_xmit+0x1456/0x2d60 [ 526.584718][ C0] ? find_held_lock+0x2d/0x110 [ 526.584723][ C0] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 526.584728][ C0] ? mark_held_locks+0x9f/0xe0 [ 526.584733][ C0] ? read_seqcount_t_begin+0x197/0x240 [ 526.584738][ C0] ? lockdep_hardirqs_on_prepare+0x19c/0x530 [ 526.584742][ C0] ? memcpy+0x39/0x60 [ 526.584747][ C0] neigh_resolve_output+0x3fe/0x6a0 [ 526.584752][ C0] ip6_finish_output2+0x8ac/0x1780 [ 526.584756][ C0] __ip6_finish_output+0x447/0xab0 [ 526.584761][ C0] ip6_finish_output+0x34/0x1f0 [ 526.584765][ C0] ip6_output+0x1db/0x520 [ 526.584769][ C0] ndisc_send_skb+0xa69/0x1720 [ 526.584775][ C0] ? ndisc_ifinfo_sysctl_change+0x5c0/0x5c0 [ 526.584780][ C0] ? ndisc_parse_options.part.0+0x480/0x480 [ 526.584785][ C0] ? __alloc_skb+0x34a/0x550 [ 526.584789][ C0] ? skb_set_owner_w+0x24e/0x400 [ 526.584793][ C0] ndisc_send_ns+0x3a9/0x850 [ 526.584798][ C0] ? addrconf_dad_work+0xb4f/0x1280 [ 526.584802][ C0] ? pndisc_redo+0x20/0x20 [ 526.584807][ C0] ? mark_held_locks+0x9f/0xe0 [ 526.584812][ C0] ? addrconf_dad_work+0xb4f/0x1280 [ 526.584817][ C0] ? __local_bh_enable_ip+0x10f/0x1f0 [ 526.584822][ C0] ? check_preemption_disabled+0x50/0x130 [ 526.584827][ C0] ? __local_bh_enable_ip+0x10f/0x1f0 [ 526.584831][ C0] ? addrconf_dad_work+0xb4f/0x1280 [ 526.584836][ C0] ? lockdep_hardirqs_on+0x53/0x100 [ 526.584841][ C0] addrconf_dad_work+0xc1c/0x1280 [ 526.584846][ C0] ? addrconf_dad_completed+0xcd0/0xcd0 [ 526.584851][ C0] ? lock_is_held_type+0xbb/0xf0 [ 526.584855][ C0] process_one_work+0x94c/0x1670 [ 526.584860][ C0] ? lock_release+0x8f0/0x8f0 [ 526.584865][ C0] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 526.584869][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 526.584874][ C0] ? lockdep_hardirqs_off+0x96/0xd0 [ 526.584878][ C0] worker_thread+0x64c/0x1120 [ 526.584883][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 526.584888][ C0] ? process_one_work+0x1670/0x1670 [ 526.584892][ C0] kthread+0x3b5/0x4a0 [ 526.584897][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 526.584901][ C0] ret_from_fork+0x1f/0x30 [ 526.584909][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 526.584927][ C0] rcu: rcu_preempt kthread starved for 10500 jiffies! g8481 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 527.219238][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 527.229357][ C0] rcu: RCU grace-period kthread stack dump: [ 527.235241][ C0] task:rcu_preempt state:I stack:29088 pid: 10 ppid: 2 flags:0x00004000 [ 527.244443][ C0] Call Trace: [ 527.247742][ C0] __schedule+0xea9/0x2230 [ 527.252171][ C0] ? io_schedule_timeout+0x140/0x140 [ 527.257511][ C0] ? prepare_to_swait_event+0x14f/0x500 [ 527.263130][ C0] ? debug_object_destroy+0x210/0x210 [ 527.268593][ C0] ? lock_downgrade+0x830/0x830 [ 527.273552][ C0] schedule+0xd0/0x2a0 [ 527.277677][ C0] schedule_timeout+0x148/0x250 [ 527.282529][ C0] ? usleep_range+0x170/0x170 [ 527.287208][ C0] ? lockdep_hardirqs_on+0x53/0x100 [ 527.292448][ C0] ? __next_timer_interrupt+0x210/0x210 [ 527.298039][ C0] ? prepare_to_swait_exclusive+0x2d0/0x2d0 [ 527.303939][ C0] rcu_gp_kthread+0xae5/0x1b50 [ 527.308717][ C0] ? rcu_note_context_switch+0x1550/0x1550 [ 527.314523][ C0] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 527.320329][ C0] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 527.326306][ C0] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 527.332117][ C0] ? lockdep_hardirqs_on+0x53/0x100 [ 527.337319][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 527.342343][ C0] ? rcu_note_context_switch+0x1550/0x1550 [ 527.348147][ C0] kthread+0x3b5/0x4a0 [ 527.352220][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 527.357335][ C0] ret_from_fork+0x1f/0x30