[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.38' (ECDSA) to the list of known hosts. syzkaller login: [ 793.688816][ T6786] IPVS: ftp: loaded support on port[0] = 21 [ 793.778066][ T6786] chnl_net:caif_netlink_parms(): no params data found [ 793.827505][ T6786] bridge0: port 1(bridge_slave_0) entered blocking state [ 793.835089][ T6786] bridge0: port 1(bridge_slave_0) entered disabled state [ 793.843806][ T6786] device bridge_slave_0 entered promiscuous mode [ 793.852870][ T6786] bridge0: port 2(bridge_slave_1) entered blocking state [ 793.860598][ T6786] bridge0: port 2(bridge_slave_1) entered disabled state [ 793.868782][ T6786] device bridge_slave_1 entered promiscuous mode [ 793.888579][ T6786] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 793.899932][ T6786] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 793.921586][ T6786] team0: Port device team_slave_0 added [ 793.929420][ T6786] team0: Port device team_slave_1 added [ 793.946157][ T6786] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 793.953310][ T6786] 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. [ 793.980095][ T6786] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 793.992836][ T6786] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 794.000309][ T6786] 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. [ 794.026863][ T6786] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 794.090394][ T6786] device hsr_slave_0 entered promiscuous mode [ 794.127408][ T6786] device hsr_slave_1 entered promiscuous mode [ 794.260417][ T6786] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 794.310305][ T6786] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 794.369515][ T6786] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 794.419577][ T6786] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 794.493175][ T6786] bridge0: port 2(bridge_slave_1) entered blocking state [ 794.500382][ T6786] bridge0: port 2(bridge_slave_1) entered forwarding state [ 794.508411][ T6786] bridge0: port 1(bridge_slave_0) entered blocking state [ 794.515478][ T6786] bridge0: port 1(bridge_slave_0) entered forwarding state [ 794.560834][ T6786] 8021q: adding VLAN 0 to HW filter on device bond0 [ 794.574092][ T6849] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 794.585164][ T6849] bridge0: port 1(bridge_slave_0) entered disabled state [ 794.593538][ T6849] bridge0: port 2(bridge_slave_1) entered disabled state [ 794.602567][ T6849] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 794.615574][ T6786] 8021q: adding VLAN 0 to HW filter on device team0 [ 794.627179][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 794.635562][ T2589] bridge0: port 1(bridge_slave_0) entered blocking state [ 794.642721][ T2589] bridge0: port 1(bridge_slave_0) entered forwarding state [ 794.654458][ T6849] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 794.663754][ T6849] bridge0: port 2(bridge_slave_1) entered blocking state [ 794.670875][ T6849] bridge0: port 2(bridge_slave_1) entered forwarding state [ 794.699404][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 794.708532][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 794.716843][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 794.726343][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 794.735734][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 794.746938][ T6786] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 794.764233][ T6849] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 794.772062][ T6849] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 794.785393][ T6786] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 794.805124][ T6849] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 794.814929][ T6849] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 794.835451][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 794.843994][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 794.853936][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 794.862656][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 794.875445][ T6786] device veth0_vlan entered promiscuous mode [ 794.888874][ T6786] device veth1_vlan entered promiscuous mode [ 794.910356][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 794.919547][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 794.928170][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 794.936551][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 794.947033][ T6786] device veth0_macvtap entered promiscuous mode [ 794.956657][ T6786] device veth1_macvtap entered promiscuous mode [ 794.973783][ T6786] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 794.981211][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 794.991497][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 794.999934][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 795.008940][ T2589] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 795.024525][ T6786] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 795.033305][ T6917] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 795.042843][ T6917] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 797.431765][ C0] hrtimer: interrupt took 2225939556 ns [ 902.497041][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 902.504318][ C1] rcu: 0-...!: (2 GPs behind) idle=89e/1/0x4000000000000000 softirq=9541/9542 fqs=10 [ 902.514208][ C1] (detected by 1, t=10502 jiffies, g=8501, q=157) [ 902.520732][ C1] Sending NMI from CPU 1 to CPUs 0: [ 902.528095][ C1] NMI backtrace for cpu 0 [ 902.528102][ C1] CPU: 0 PID: 3843 Comm: kworker/0:10 Not tainted 5.8.0-rc3-syzkaller #0 [ 902.528109][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 902.528113][ C1] Workqueue: events iterate_cleanup_work [ 902.528121][ C1] RIP: 0010:check_memory_region+0x9/0x180 [ 902.528134][ C1] Code: 00 48 89 f2 be f5 00 00 00 e9 43 25 ff 01 0f 1f 00 48 89 f2 be f8 00 00 00 e9 33 25 ff 01 0f 1f 00 48 85 f6 0f 84 70 01 00 00 <49> 89 f9 41 54 44 0f b6 c2 49 01 f1 55 53 0f 82 18 01 00 00 48 b8 [ 902.528138][ C1] RSP: 0018:ffffc90000007b30 EFLAGS: 00000002 [ 902.528147][ C1] RAX: 0000000000000001 RBX: 0000000000000054 RCX: ffffffff8159836c [ 902.528152][ C1] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8c58fa28 [ 902.528158][ C1] RBP: ffff8880995340c0 R08: 0000000000000000 R09: ffffffff8c58fa2f [ 902.528163][ C1] R10: fffffbfff18b1f45 R11: 0000000000000001 R12: 0000000000000000 [ 902.528169][ C1] R13: ffff888099534a2a R14: ffff888099534a08 R15: 0000000000000003 [ 902.528174][ C1] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 902.528179][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 902.528185][ C1] CR2: 00000000004c9088 CR3: 0000000009a79000 CR4: 00000000001406f0 [ 902.528191][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 902.528196][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 902.528200][ C1] Call Trace: [ 902.528203][ C1] [ 902.528206][ C1] mark_lock+0xbc/0x1710 [ 902.528211][ C1] __lock_acquire+0x1422/0x56e0 [ 902.528215][ C1] ? sugov_update_single+0x382/0x910 [ 902.528219][ C1] ? debug_object_deactivate+0x264/0x300 [ 902.528224][ C1] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 902.528228][ C1] ? lock_acquire+0x1f1/0xad0 [ 902.528232][ C1] ? advance_sched+0x4ab/0x990 [ 902.528236][ C1] ? find_held_lock+0x2d/0x110 [ 902.528240][ C1] lock_acquire+0x1f1/0xad0 [ 902.528244][ C1] ? __hrtimer_run_queues+0x252/0xfc0 [ 902.528248][ C1] ? lock_release+0x8d0/0x8d0 [ 902.528252][ C1] ? advance_sched+0x56d/0x990 [ 902.528257][ C1] ? lockdep_hardirqs_off+0x66/0xa0 [ 902.528261][ C1] _raw_spin_lock_irq+0x5b/0x80 [ 902.528265][ C1] ? __hrtimer_run_queues+0x252/0xfc0 [ 902.528269][ C1] __hrtimer_run_queues+0x252/0xfc0 [ 902.528274][ C1] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 902.528278][ C1] ? ktime_get_update_offsets_now+0x1c4/0x250 [ 902.528283][ C1] hrtimer_interrupt+0x32a/0x930 [ 902.528287][ C1] __sysvec_apic_timer_interrupt+0x142/0x5e0 [ 902.528291][ C1] asm_call_on_stack+0xf/0x20 [ 902.528294][ C1] [ 902.528299][ C1] sysvec_apic_timer_interrupt+0xe0/0x120 [ 902.528304][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 902.528308][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x55/0x60 [ 902.528320][ C1] Code: 82 e0 13 00 00 83 f8 02 75 20 48 8b 8a e8 13 00 00 8b 92 e4 13 00 00 48 8b 01 48 83 c0 01 48 39 c2 76 07 48 89 34 c1 48 89 01 66 2e 0f 1f 84 00 00 00 00 00 41 55 41 54 49 89 fc 55 48 bd eb [ 902.528325][ C1] RSP: 0018:ffffc90004a3fbc0 EFLAGS: 00000293 [ 902.528333][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff866f7422 [ 902.528339][ C1] RDX: ffff8880995340c0 RSI: ffffffff866f742f RDI: 0000000000000001 [ 902.528345][ C1] RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000003 [ 902.528350][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89a6fc80 [ 902.528356][ C1] R13: 0000000000007f07 R14: 0000000000000000 R15: 0000000000000001 [ 902.528360][ C1] ? nf_ct_iterate_cleanup+0x112/0x330 [ 902.528365][ C1] ? nf_ct_iterate_cleanup+0x11f/0x330 [ 902.528369][ C1] nf_ct_iterate_cleanup+0x11f/0x330 [ 902.528374][ C1] ? nf_ct_port_nlattr_to_tuple+0x1d0/0x1d0 [ 902.528378][ C1] nf_ct_iterate_cleanup_net+0x113/0x170 [ 902.528383][ C1] ? nf_nat_masquerade_inet_unregister_notifiers+0x70/0x70 [ 902.528388][ C1] ? nf_ct_iterate_cleanup+0x330/0x330 [ 902.528393][ C1] ? nf_nat_masquerade_inet_unregister_notifiers+0x70/0x70 [ 902.528397][ C1] ? __schedule+0x887/0x1eb0 [ 902.528401][ C1] ? _raw_spin_unlock_irq+0x1f/0x80 [ 902.528406][ C1] iterate_cleanup_work+0x45/0x130 [ 902.528410][ C1] process_one_work+0x94c/0x1670 [ 902.528414][ C1] ? lock_release+0x8d0/0x8d0 [ 902.528418][ C1] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 902.528422][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 902.528426][ C1] ? lockdep_hardirqs_off+0x66/0xa0 [ 902.528430][ C1] worker_thread+0x64c/0x1120 [ 902.528434][ C1] ? __kthread_parkme+0x13f/0x1e0 [ 902.528439][ C1] ? process_one_work+0x1670/0x1670 [ 902.528442][ C1] kthread+0x3b5/0x4a0 [ 902.528447][ C1] ? __kthread_bind_mask+0xc0/0xc0 [ 902.528451][ C1] ? __kthread_bind_mask+0xc0/0xc0 [ 902.528455][ C1] ret_from_fork+0x1f/0x30 [ 902.528461][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 902.528483][ C1] rcu: rcu_preempt kthread starved for 10482 jiffies! g8501 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 903.008703][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 903.018671][ C1] rcu: RCU grace-period kthread stack dump: [ 903.024563][ C1] rcu_preempt I29664 10 2 0x00004000 [ 903.030928][ C1] Call Trace: [ 903.034248][ C1] __schedule+0x8e1/0x1eb0 [ 903.038713][ C1] ? io_schedule_timeout+0x140/0x140 [ 903.044032][ C1] ? enqueue_timer+0x420/0x420 [ 903.048808][ C1] ? lock_downgrade+0x820/0x820 [ 903.053675][ C1] schedule+0xd0/0x2a0 [ 903.057758][ C1] schedule_timeout+0x148/0x250 [ 903.062622][ C1] ? usleep_range+0x170/0x170 [ 903.067304][ C1] ? lockdep_hardirqs_on+0x6a/0xe0 [ 903.072422][ C1] ? __next_timer_interrupt+0x190/0x190 [ 903.078049][ C1] ? prepare_to_swait_exclusive+0x2d0/0x2d0 [ 903.084016][ C1] rcu_gp_kthread+0xae5/0x1b50 [ 903.088820][ C1] ? call_rcu+0x7e0/0x7e0 [ 903.093190][ C1] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 903.099047][ C1] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 903.105047][ C1] ? lockdep_hardirqs_on+0x6a/0xe0 [ 903.110177][ C1] ? __kthread_parkme+0x13f/0x1e0 [ 903.115237][ C1] ? call_rcu+0x7e0/0x7e0 [ 903.119591][ C1] kthread+0x3b5/0x4a0 [ 903.123679][ C1] ? __kthread_bind_mask+0xc0/0xc0 [ 903.128828][ C1] ? __kthread_bind_mask+0xc0/0xc0 [ 903.133978][ C1] ret_from_fork+0x1f/0x30