[ OK ] Reached target Login Prompts. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.207' (ECDSA) to the list of known hosts. syzkaller login: [ 703.314801][ T6802] IPVS: ftp: loaded support on port[0] = 21 [ 703.387439][ T6802] chnl_net:caif_netlink_parms(): no params data found [ 703.433490][ T6802] bridge0: port 1(bridge_slave_0) entered blocking state [ 703.441117][ T6802] bridge0: port 1(bridge_slave_0) entered disabled state [ 703.450082][ T6802] device bridge_slave_0 entered promiscuous mode [ 703.458921][ T6802] bridge0: port 2(bridge_slave_1) entered blocking state [ 703.466569][ T6802] bridge0: port 2(bridge_slave_1) entered disabled state [ 703.474116][ T6802] device bridge_slave_1 entered promiscuous mode [ 703.492574][ T6802] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 703.503234][ T6802] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 703.524842][ T6802] team0: Port device team_slave_0 added [ 703.532562][ T6802] team0: Port device team_slave_1 added [ 703.548530][ T6802] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 703.555614][ T6802] 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. [ 703.582263][ T6802] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 703.594750][ T6802] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 703.602176][ T6802] 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. [ 703.628506][ T6802] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 703.708250][ T6802] device hsr_slave_0 entered promiscuous mode [ 703.755523][ T6802] device hsr_slave_1 entered promiscuous mode [ 703.873560][ T6802] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 703.928110][ T6802] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 703.977108][ T6802] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 704.017115][ T6802] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 704.080609][ T6802] bridge0: port 2(bridge_slave_1) entered blocking state [ 704.087768][ T6802] bridge0: port 2(bridge_slave_1) entered forwarding state [ 704.095433][ T6802] bridge0: port 1(bridge_slave_0) entered blocking state [ 704.102490][ T6802] bridge0: port 1(bridge_slave_0) entered forwarding state [ 704.141933][ T6802] 8021q: adding VLAN 0 to HW filter on device bond0 [ 704.157408][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 704.167929][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 704.176430][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 704.184128][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 704.196820][ T6802] 8021q: adding VLAN 0 to HW filter on device team0 [ 704.207735][ T6930] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 704.216905][ T6930] bridge0: port 1(bridge_slave_0) entered blocking state [ 704.223947][ T6930] bridge0: port 1(bridge_slave_0) entered forwarding state [ 704.248217][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 704.256796][ T2513] bridge0: port 2(bridge_slave_1) entered blocking state [ 704.263817][ T2513] bridge0: port 2(bridge_slave_1) entered forwarding state [ 704.272550][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 704.282294][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 704.297363][ T6802] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 704.308097][ T6802] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 704.322037][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 704.329939][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 704.338648][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 704.347444][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 704.365576][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 704.372957][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 704.383013][ T6802] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 704.401510][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 704.410450][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 704.430178][ T6802] device veth0_vlan entered promiscuous mode [ 704.437580][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 704.447292][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 704.456088][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 704.463684][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 704.478745][ T6802] device veth1_vlan entered promiscuous mode [ 704.497995][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 704.506440][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 704.514251][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 704.523351][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 704.533852][ T6802] device veth0_macvtap entered promiscuous mode [ 704.544041][ T6802] device veth1_macvtap entered promiscuous mode [ 704.560090][ T6802] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 704.567785][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 704.576454][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 704.584188][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 704.593138][ T2513] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 704.604014][ T6802] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 704.612114][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 704.620967][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 713.587208][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08 [ 734.064568][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08 [ 754.542974][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08 [ 775.021677][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08 [ 795.500654][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08 [ 809.807914][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 809.815010][ C1] rcu: 0-...0: (3 ticks this GP) idle=ff2/1/0x4000000000000000 softirq=8592/8593 fqs=5250 [ 809.825238][ C1] (detected by 1, t=10502 jiffies, g=8273, q=66) [ 809.831636][ C1] Sending NMI from CPU 1 to CPUs 0: [ 809.838954][ C1] NMI backtrace for cpu 0 [ 809.838963][ C1] CPU: 0 PID: 6802 Comm: syz-executor688 Not tainted 5.8.0-rc3-next-20200703-syzkaller #0 [ 809.838971][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 809.838977][ C1] RIP: 0010:rcu_lockdep_current_cpu_online+0xc8/0x110 [ 809.838993][ C1] Code: 59 48 8d 7d 70 48 8b 5b 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 41 48 8b 45 70 48 85 c3 0f 95 c0 <65> ff 0d d1 18 a1 7e 74 07 48 83 c4 08 5b 5d c3 e8 52 93 9f ff eb [ 809.838998][ C1] RSP: 0018:ffffc90000007db8 EFLAGS: 00000002 [ 809.839008][ C1] RAX: 0000000000000001 RBX: 0000000000000001 RCX: 1ffffffff1303b28 [ 809.839014][ C1] RDX: 1ffffffff1378c1e RSI: 0000000000010204 RDI: ffffffff89bc60f0 [ 809.839021][ C1] RBP: ffffffff89bc6080 R08: 0000000000000000 R09: ffffffff8aaf028f [ 809.839028][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 809.839035][ C1] R13: ffff8880ae627840 R14: ffff888094512340 R15: dffffc0000000000 [ 809.839042][ C1] FS: 00000000017fe880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 809.839048][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 809.839055][ C1] CR2: 0000000020000610 CR3: 000000009aba2000 CR4: 00000000001506f0 [ 809.839061][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 809.839068][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 809.839072][ C1] Call Trace: [ 809.839074][ C1] [ 809.839079][ C1] ? rcu_is_watching+0x11/0xb0 [ 809.839084][ C1] rcu_read_lock_sched_held+0x25/0xb0 [ 809.839088][ C1] __hrtimer_run_queues+0xd13/0xfc0 [ 809.839094][ C1] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 809.839099][ C1] ? ktime_get_update_offsets_now+0x1c4/0x250 [ 809.839104][ C1] hrtimer_interrupt+0x32a/0x930 [ 809.839109][ C1] __sysvec_apic_timer_interrupt+0x142/0x5e0 [ 809.839113][ C1] asm_call_on_stack+0xf/0x20 [ 809.839116][ C1] [ 809.839121][ C1] sysvec_apic_timer_interrupt+0xe0/0x120 [ 809.839127][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 809.839132][ C1] RIP: 0010:_raw_spin_unlock_irqrestore+0x8c/0xe0 [ 809.839148][ C1] Code: 48 c7 c0 00 ff b4 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d 9b 74 c8 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 95 fb 62 f9 65 8b 05 fe 73 15 78 [ 809.839153][ C1] RSP: 0018:ffffc900010872c0 EFLAGS: 00000282 [ 809.839163][ C1] RAX: 1ffffffff1369fe0 RBX: 0000000000000282 RCX: 0000000000000002 [ 809.839169][ C1] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282 [ 809.839176][ C1] RBP: ffff8880945122e8 R08: 0000000000000000 R09: 0000000000000000 [ 809.839183][ C1] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000282 [ 809.839190][ C1] R13: 161f14abb88be58f R14: ffff888094512000 R15: 0000000000000000 [ 809.839194][ C1] taprio_change+0x1fdc/0x2960 [ 809.839198][ C1] ? taprio_peek_soft+0x5e0/0x5e0 [ 809.839203][ C1] ? mutex_is_locked+0xe/0x40 [ 809.839207][ C1] ? rtnl_is_locked+0x11/0x20 [ 809.839211][ C1] ? qdisc_hash_add+0x228/0x350 [ 809.839216][ C1] taprio_init+0x52e/0x670 [ 809.839220][ C1] ? taprio_change+0x2960/0x2960 [ 809.839224][ C1] qdisc_create+0x4b6/0x12e0 [ 809.839229][ C1] ? tc_get_qdisc+0xad0/0xad0 [ 809.839233][ C1] ? __nla_parse+0x3d/0x4a [ 809.839237][ C1] tc_modify_qdisc+0x4c8/0x1990 [ 809.839242][ C1] ? rtnetlink_rcv_msg+0x3f9/0xad0 [ 809.839246][ C1] ? qdisc_create+0x12e0/0x12e0 [ 809.839250][ C1] ? lock_is_held_type+0xb0/0xe0 [ 809.839255][ C1] ? qdisc_create+0x12e0/0x12e0 [ 809.839259][ C1] rtnetlink_rcv_msg+0x44e/0xad0 [ 809.839264][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 809.839268][ C1] ? lock_acquire+0x1f1/0xad0 [ 809.839273][ C1] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 809.839278][ C1] netlink_rcv_skb+0x15a/0x430 [ 809.839282][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 809.839287][ C1] ? netlink_ack+0xa10/0xa10 [ 809.839291][ C1] netlink_unicast+0x533/0x7d0 [ 809.839296][ C1] ? netlink_attachskb+0x810/0x810 [ 809.839301][ C1] ? _copy_from_iter_full+0x247/0x890 [ 809.839305][ C1] ? __phys_addr+0x9a/0x110 [ 809.839309][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 809.839314][ C1] ? __check_object_size+0x171/0x3e4 [ 809.839318][ C1] netlink_sendmsg+0x856/0xd90 [ 809.839323][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 809.839327][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 809.839332][ C1] sock_sendmsg+0xcf/0x120 [ 809.839336][ C1] ____sys_sendmsg+0x6e8/0x810 [ 809.839340][ C1] ? kernel_sendmsg+0x50/0x50 [ 809.839345][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 809.839349][ C1] ? mark_lock+0xbc/0x1710 [ 809.839353][ C1] ? __lock_acquire+0xc1e/0x56e0 [ 809.839357][ C1] ___sys_sendmsg+0xf3/0x170 [ 809.839362][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 809.839367][ C1] ? percpu_counter_add_batch+0x126/0x180 [ 809.839372][ C1] ? lock_acquire+0x1f1/0xad0 [ 809.839376][ C1] ? __get_unused_fd_flags+0x60/0x60 [ 809.839381][ C1] ? find_held_lock+0x2d/0x110 [ 809.839385][ C1] ? __fd_install+0x1b4/0x600 [ 809.839390][ C1] ? lock_downgrade+0x820/0x820 [ 809.839394][ C1] ? __fget_light+0x215/0x280 [ 809.839398][ C1] __sys_sendmsg+0xe5/0x1b0 [ 809.839403][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 809.839407][ C1] ? do_syscall_64+0x1c/0xe0 [ 809.839412][ C1] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 809.839416][ C1] do_syscall_64+0x60/0xe0 [ 809.839422][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 809.839425][ C1] RIP: 0033:0x443799 [ 809.839429][ C1] Code: Bad RIP value. [ 809.839434][ C1] RSP: 002b:00007ffceabd28c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 809.839446][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443799 [ 809.839453][ C1] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 809.839459][ C1] RBP: 00007ffceabd28d0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 809.839466][ C1] R10: 0000000001bbbbbb R11: 0000000000000246 R12: 00007ffceabd28e0 [ 809.839473][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 809.839481][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 815.978982][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08