[ 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 '10.128.0.115' (ECDSA) to the list of known hosts. syzkaller login: [ 508.936057][ T6849] IPVS: ftp: loaded support on port[0] = 21 [ 509.046242][ T6849] chnl_net:caif_netlink_parms(): no params data found [ 509.102964][ T6849] bridge0: port 1(bridge_slave_0) entered blocking state [ 509.111054][ T6849] bridge0: port 1(bridge_slave_0) entered disabled state [ 509.120046][ T6849] device bridge_slave_0 entered promiscuous mode [ 509.129788][ T6849] bridge0: port 2(bridge_slave_1) entered blocking state [ 509.137476][ T6849] bridge0: port 2(bridge_slave_1) entered disabled state [ 509.145938][ T6849] device bridge_slave_1 entered promiscuous mode [ 509.167429][ T6849] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 509.179133][ T6849] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 509.201015][ T6849] team0: Port device team_slave_0 added [ 509.208778][ T6849] team0: Port device team_slave_1 added [ 509.226900][ T6849] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 509.234085][ T6849] 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. [ 509.261302][ T6849] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 509.275381][ T6849] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 509.282817][ T6849] 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. [ 509.310017][ T6849] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 509.338432][ T6849] device hsr_slave_0 entered promiscuous mode [ 509.346004][ T6849] device hsr_slave_1 entered promiscuous mode [ 509.442845][ T6849] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 509.457898][ T6849] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 509.467536][ T6849] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 509.480689][ T6849] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 509.507509][ T6849] bridge0: port 2(bridge_slave_1) entered blocking state [ 509.514690][ T6849] bridge0: port 2(bridge_slave_1) entered forwarding state [ 509.522505][ T6849] bridge0: port 1(bridge_slave_0) entered blocking state [ 509.529657][ T6849] bridge0: port 1(bridge_slave_0) entered forwarding state [ 509.577228][ T6849] 8021q: adding VLAN 0 to HW filter on device bond0 [ 509.590811][ T6841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 509.602349][ T6841] bridge0: port 1(bridge_slave_0) entered disabled state [ 509.611219][ T6841] bridge0: port 2(bridge_slave_1) entered disabled state [ 509.619866][ T6841] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 509.633841][ T6849] 8021q: adding VLAN 0 to HW filter on device team0 [ 509.646674][ T3923] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 509.655291][ T3923] bridge0: port 1(bridge_slave_0) entered blocking state [ 509.662333][ T3923] bridge0: port 1(bridge_slave_0) entered forwarding state [ 509.685373][ T7060] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 509.694551][ T7060] bridge0: port 2(bridge_slave_1) entered blocking state [ 509.701598][ T7060] bridge0: port 2(bridge_slave_1) entered forwarding state [ 509.710335][ T7060] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 509.730907][ T6849] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 509.741759][ T6849] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 509.755305][ T7061] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 509.764541][ T7061] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 509.773221][ T7061] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 509.781876][ T7061] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 509.792303][ T7061] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 509.814798][ T6849] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 509.822277][ T7062] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 509.830122][ T7062] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 509.849817][ T7058] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 509.871391][ T7062] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 509.879919][ T7062] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 509.888705][ T7062] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 509.899650][ T6849] device veth0_vlan entered promiscuous mode [ 509.911455][ T6849] device veth1_vlan entered promiscuous mode [ 509.933411][ T7058] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 509.941498][ T7058] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 509.950251][ T7058] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 509.961515][ T6849] device veth0_macvtap entered promiscuous mode [ 509.972145][ T6849] device veth1_macvtap entered promiscuous mode [ 509.990209][ T6849] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 509.997922][ T7062] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 510.007867][ T7062] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 510.019351][ T6849] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 510.027124][ T7058] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready executing program [ 510.036464][ T7058] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 510.048549][ T6849] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 510.058005][ T6849] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 510.067680][ T6849] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 510.077024][ T6849] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 615.110768][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 615.117929][ C0] rcu: 1-...0: (2 ticks this GP) idle=0e6/1/0x4000000000000000 softirq=8519/8519 fqs=5250 [ 615.128207][ C0] (detected by 0, t=10502 jiffies, g=8641, q=94) [ 615.134613][ C0] Sending NMI from CPU 0 to CPUs 1: [ 615.142009][ C0] NMI backtrace for cpu 1 [ 615.142016][ C0] CPU: 1 PID: 6849 Comm: syz-executor792 Not tainted 5.8.0-syzkaller #0 [ 615.142025][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 615.142030][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x51/0xe0 [ 615.142045][ C0] Code: 36 b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 80 00 00 00 48 83 3d 6e 2a c1 01 00 74 5f 48 89 df 57 9d <0f> 1f 44 00 00 e8 b5 f5 84 f9 eb 34 e8 0e fc 84 f9 48 c7 c0 08 36 [ 615.142050][ C0] RSP: 0018:ffffc90000da8dd0 EFLAGS: 00000082 [ 615.142060][ C0] RAX: 1ffffffff136c6c1 RBX: 0000000000000082 RCX: ffffffff815b5b60 [ 615.142066][ C0] RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000082 [ 615.142073][ C0] RBP: ffff8880ae727740 R08: 0000000000000000 R09: ffff8880ae727743 [ 615.142079][ C0] R10: ffffed1015ce4ee8 R11: 0000000000000000 R12: ffff8880ae727740 [ 615.142086][ C0] R13: ffff8880ae727840 R14: ffff8880a8ba3b40 R15: dffffc0000000000 [ 615.142093][ C0] FS: 00000000014e7880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 615.142099][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 615.142105][ C0] CR2: 0000000020000610 CR3: 00000000a8587000 CR4: 00000000001506e0 [ 615.142112][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 615.142119][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 615.142122][ C0] Call Trace: [ 615.142125][ C0] [ 615.142129][ C0] __hrtimer_run_queues+0x5d1/0xfc0 [ 615.142134][ C0] ? taprio_dequeue_soft+0xa40/0xa40 [ 615.142139][ C0] ? lockdep_hardirqs_off+0x71/0xc0 [ 615.142144][ C0] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 615.142149][ C0] ? ktime_get_update_offsets_now+0x1c4/0x250 [ 615.142154][ C0] hrtimer_interrupt+0x32a/0x930 [ 615.142159][ C0] __sysvec_apic_timer_interrupt+0x142/0x5e0 [ 615.142163][ C0] asm_call_on_stack+0xf/0x20 [ 615.142166][ C0] [ 615.142171][ C0] sysvec_apic_timer_interrupt+0xb2/0xf0 [ 615.142176][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 615.142182][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x8c/0xe0 [ 615.142196][ C0] Code: 48 c7 c0 08 36 b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d 33 2a c1 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 35 a7 5a f9 65 8b 05 8e f2 0c 78 [ 615.142201][ C0] RSP: 0018:ffffc900012772c8 EFLAGS: 00000282 [ 615.142210][ C0] RAX: 1ffffffff136c6c1 RBX: 0000000000000282 RCX: 0000000000000002 [ 615.142217][ C0] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282 [ 615.142224][ C0] RBP: ffff8880a8ba3ae8 R08: 0000000000000001 R09: ffffffff8c5f0aaf [ 615.142230][ C0] R10: fffffbfff18be155 R11: 000000000001fdb0 R12: 0000000000000282 [ 615.142237][ C0] R13: 162be4960ee7d103 R14: ffff8880a8ba3800 R15: 0000000000000000 [ 615.142241][ C0] taprio_change+0x1fdc/0x2960 [ 615.142246][ C0] ? taprio_peek_soft+0x5e0/0x5e0 [ 615.142250][ C0] ? mutex_is_locked+0xe/0x40 [ 615.142255][ C0] ? rtnl_is_locked+0x11/0x20 [ 615.142259][ C0] ? qdisc_hash_add+0x228/0x350 [ 615.142263][ C0] taprio_init+0x52e/0x670 [ 615.142268][ C0] ? taprio_change+0x2960/0x2960 [ 615.142272][ C0] qdisc_create+0x4b6/0x12e0 [ 615.142276][ C0] ? tc_get_qdisc+0xad0/0xad0 [ 615.142280][ C0] ? __nla_parse+0x3d/0x4a [ 615.142285][ C0] tc_modify_qdisc+0x4c8/0x1990 [ 615.142289][ C0] ? rtnetlink_rcv_msg+0x3f9/0xad0 [ 615.142294][ C0] ? qdisc_create+0x12e0/0x12e0 [ 615.142298][ C0] ? lock_is_held_type+0xbb/0xf0 [ 615.142302][ C0] ? qdisc_create+0x12e0/0x12e0 [ 615.142307][ C0] rtnetlink_rcv_msg+0x44e/0xad0 [ 615.142317][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 615.142321][ C0] ? lock_acquire+0x1f1/0xad0 [ 615.142326][ C0] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 615.142330][ C0] netlink_rcv_skb+0x15a/0x430 [ 615.142335][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 615.142339][ C0] ? netlink_ack+0xa10/0xa10 [ 615.142344][ C0] netlink_unicast+0x533/0x7d0 [ 615.142348][ C0] ? netlink_attachskb+0x810/0x810 [ 615.142353][ C0] ? _copy_from_iter_full+0x247/0x890 [ 615.142357][ C0] ? __phys_addr+0x9a/0x110 [ 615.142362][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 615.142366][ C0] ? __check_object_size+0x171/0x3e4 [ 615.142371][ C0] netlink_sendmsg+0x856/0xd90 [ 615.142375][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 615.142380][ C0] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 615.142384][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 615.142388][ C0] sock_sendmsg+0xcf/0x120 [ 615.142392][ C0] ____sys_sendmsg+0x6e8/0x810 [ 615.142397][ C0] ? kernel_sendmsg+0x50/0x50 [ 615.142401][ C0] ? do_recvmmsg+0x6d0/0x6d0 [ 615.142405][ C0] ? mark_lock+0xbc/0x1710 [ 615.142409][ C0] ? lock_is_held_type+0xbb/0xf0 [ 615.142414][ C0] ? __lock_acquire+0xbb5/0x5640 [ 615.142418][ C0] ___sys_sendmsg+0xf3/0x170 [ 615.142423][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 615.142428][ C0] ? percpu_counter_add_batch+0x126/0x180 [ 615.142432][ C0] ? lock_acquire+0x1f1/0xad0 [ 615.142437][ C0] ? __get_unused_fd_flags+0x60/0x60 [ 615.142441][ C0] ? find_held_lock+0x2d/0x110 [ 615.142445][ C0] ? __fd_install+0x1b4/0x600 [ 615.142450][ C0] ? lock_downgrade+0x830/0x830 [ 615.142454][ C0] ? __fget_light+0x215/0x280 [ 615.142458][ C0] __sys_sendmsg+0xe5/0x1b0 [ 615.142463][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 615.142467][ C0] ? trace_hardirqs_on+0x5f/0x220 [ 615.142472][ C0] ? lockdep_hardirqs_on+0x76/0xf0 [ 615.142476][ C0] do_syscall_64+0x2d/0x70 [ 615.142481][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 615.142484][ C0] RIP: 0033:0x443d59 [ 615.142499][ C0] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 0d fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 615.142504][ C0] RSP: 002b:00007ffd3792a0d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 615.142515][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443d59 [ 615.142522][ C0] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 615.142529][ C0] RBP: 00007ffd3792a0f0 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 615.142535][ C0] R10: 00000000bb1414ac R11: 0000000000000246 R12: 00007ffd3792a120 [ 615.142542][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 615.142549][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs