[ 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... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.138' (ECDSA) to the list of known hosts. syzkaller login: [ 74.529512] IPVS: ftp: loaded support on port[0] = 21 [ 74.597796] chnl_net:caif_netlink_parms(): no params data found [ 74.672481] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.679005] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.686650] device bridge_slave_0 entered promiscuous mode [ 74.694053] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.700931] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.707829] device bridge_slave_1 entered promiscuous mode [ 74.725081] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 74.733773] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 74.751292] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 74.758800] team0: Port device team_slave_0 added [ 74.764797] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 74.772410] team0: Port device team_slave_1 added [ 74.787180] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.793489] 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. [ 74.819372] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.831115] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.837335] 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. [ 74.863305] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.877567] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 74.885159] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 74.903768] device hsr_slave_0 entered promiscuous mode [ 74.909408] device hsr_slave_1 entered promiscuous mode [ 74.915654] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 74.922862] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 74.984259] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.990682] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.997353] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.003754] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.033150] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 75.039208] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.049418] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 75.057957] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 75.066301] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.073536] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.081086] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 75.091278] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 75.097327] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.106562] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.114723] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.121116] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.141699] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.149271] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.155658] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.162964] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.170837] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 75.178357] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 75.186016] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.193971] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 75.203009] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 75.209116] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.222280] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 75.229412] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 75.236167] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 75.246379] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 75.279572] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 75.289313] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.317228] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 75.324646] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 75.331994] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 75.340910] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.348283] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.355516] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.364096] device veth0_vlan entered promiscuous mode [ 75.373446] device veth1_vlan entered promiscuous mode [ 75.379271] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 75.388376] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 75.400801] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 75.409769] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.417470] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 75.425141] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.434712] device veth0_macvtap entered promiscuous mode [ 75.441538] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 75.449418] device veth1_macvtap entered promiscuous mode [ 75.458120] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 75.467226] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 75.477299] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.484387] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.492448] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 75.502070] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.508743] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 103.109359] watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/0:1:14] [ 103.117109] Modules linked in: [ 103.120292] irq event stamp: 62139719 [ 103.124076] hardirqs last enabled at (62139718): [] ktime_get+0x235/0x2f0 [ 103.132634] hardirqs last disabled at (62139719): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 103.142314] softirqs last enabled at (107822): [] icmp6_dst_alloc+0x3de/0x660 [ 103.151213] softirqs last disabled at (107824): [] ip6_finish_output2+0x1f2/0x2290 [ 103.161069] CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 4.19.211-syzkaller #0 [ 103.168402] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 103.177744] Workqueue: ipv6_addrconf addrconf_dad_work [ 103.183006] RIP: 0010:ktime_get+0x25f/0x2f0 [ 103.187305] Code: 48 c7 c0 88 82 f1 89 48 c1 e8 03 42 80 3c 20 00 0f 85 86 00 00 00 48 83 3d 25 ee 9c 08 00 74 35 e8 06 f1 0d 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 ce fe ff ff e8 f2 f0 0d 00 0f 0b e8 eb f0 0d 00 [ 103.206191] RSP: 0018:ffff8880b5a96bf0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 103.213884] RAX: ffff8880b5a82380 RBX: 0000000000000293 RCX: 1ffff11016b505b7 [ 103.221129] RDX: 0000000000000000 RSI: ffffffff8154946a RDI: 0000000000000293 [ 103.228380] RBP: fffffbfff13e3050 R08: ffffffff8cd35818 R09: 0000000000000000 [ 103.235625] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 103.244088] R13: 1ffffffff13e3052 R14: 0000000000000200 R15: 0000000000000001 [ 103.251338] FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 103.259545] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.265409] CR2: 00007fe234dd5390 CR3: 0000000009e6d000 CR4: 00000000003406f0 [ 103.272660] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.279907] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.287152] Call Trace: [ 103.289726] tcf_police_act+0x3e8/0xe60 [ 103.293683] ? tcf_police_dump+0x960/0x960 [ 103.297896] ? tcf_action_exec+0x16f/0x400 [ 103.302109] ? tcf_action_exec+0x12e/0x400 [ 103.306325] tcf_action_exec+0x160/0x400 [ 103.310369] basic_classify+0x184/0x2b0 [ 103.314324] tcf_classify+0x120/0x3c0 [ 103.318105] prio_enqueue+0x3bb/0x7a0 [ 103.321887] ? prio_reset+0x160/0x160 [ 103.325668] ? __dev_queue_xmit+0x134e/0x2e00 [ 103.330149] __dev_queue_xmit+0x140a/0x2e00 [ 103.334471] ? netdev_pick_tx+0x2f0/0x2f0 [ 103.338618] ? mark_held_locks+0xa6/0xf0 [ 103.342670] ? ip_finish_output2+0xfbc/0x15a0 [ 103.347160] ip_finish_output2+0xb6d/0x15a0 [ 103.351471] ? ip_send_check+0xb0/0xb0 [ 103.355341] ? ip_output+0x3a5/0x5f0 [ 103.359040] ip_finish_output+0xae9/0x10b0 [ 103.363260] ip_output+0x203/0x5f0 [ 103.366782] ? ip_mc_output+0xec0/0xec0 [ 103.370739] ? ip_fragment.constprop.0+0x240/0x240 [ 103.375649] ? prandom_u32+0x171/0x1f0 [ 103.379538] ip_local_out+0xaf/0x170 [ 103.383252] iptunnel_xmit+0x63b/0x9d0 [ 103.387126] ? erspan_changelink+0x150/0x220 [ 103.391520] geneve_xmit+0x120d/0x2e60 [ 103.395396] ? geneve_fill_metadata_dst+0x1580/0x1580 [ 103.400598] ? __lock_acquire+0x6de/0x3ff0 [ 103.404818] ? netif_skb_features+0x5c1/0xb30 [ 103.409299] ? check_preemption_disabled+0x41/0x280 [ 103.414324] dev_hard_start_xmit+0x1a8/0x920 [ 103.418728] __dev_queue_xmit+0x269d/0x2e00 [ 103.423032] ? netdev_pick_tx+0x2f0/0x2f0 [ 103.427165] ? ip6_finish_output2+0x113d/0x2290 [ 103.431820] ? memcpy+0x35/0x50 [ 103.435083] neigh_resolve_output+0x55a/0x910 [ 103.439561] ip6_finish_output2+0x113d/0x2290 [ 103.444042] ? ip6_forward_finish+0x4b0/0x4b0 [ 103.448535] ? lock_downgrade+0x720/0x720 [ 103.452677] ? lock_acquire+0x170/0x3c0 [ 103.456638] ? check_preemption_disabled+0x41/0x280 [ 103.461638] ip6_finish_output+0x89b/0x10f0 [ 103.465951] ip6_output+0x205/0x770 [ 103.469583] ? ip6_finish_output+0x10f0/0x10f0 [ 103.474168] ? ip6_fragment+0x34e0/0x34e0 [ 103.478300] ? check_preemption_disabled+0x41/0x280 [ 103.483302] ndisc_send_skb+0xa24/0x1720 [ 103.487361] ? ndisc_alloc_skb+0x320/0x320 [ 103.491583] ? ipv6_setsockopt+0x160/0x160 [ 103.495804] ? kmem_cache_alloc_node_trace+0x351/0x3b0 [ 103.501066] ? __alloc_skb+0x34f/0x560 [ 103.504945] ? skb_set_owner_w+0x1f6/0x330 [ 103.509169] ndisc_send_ns+0x51d/0x840 [ 103.513048] ? addrconf_dad_work+0xa48/0x10a0 [ 103.517532] ? pndisc_redo+0x20/0x20 [ 103.521230] ? mark_held_locks+0xa6/0xf0 [ 103.525282] ? __local_bh_enable_ip+0x159/0x270 [ 103.529940] addrconf_dad_work+0xb0e/0x10a0 [ 103.534248] ? addrconf_dad_completed+0xb60/0xb60 [ 103.539077] process_one_work+0x864/0x1570 [ 103.543305] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 103.547961] worker_thread+0x64c/0x1130 [ 103.551920] ? __kthread_parkme+0x133/0x1e0 [ 103.556221] ? process_one_work+0x1570/0x1570 [ 103.560697] kthread+0x33f/0x460 [ 103.564047] ? kthread_park+0x180/0x180 [ 103.568005] ret_from_fork+0x24/0x30 [ 103.571703] Kernel panic - not syncing: softlockup: hung tasks [ 103.577660] CPU: 0 PID: 14 Comm: kworker/0:1 Tainted: G L 4.19.211-syzkaller #0 [ 103.586394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 103.595764] Workqueue: ipv6_addrconf addrconf_dad_work [ 103.601022] Call Trace: [ 103.603587] [ 103.605724] dump_stack+0x1fc/0x2ef [ 103.609342] panic+0x26a/0x50e [ 103.612523] ? __warn_printk+0xf3/0xf3 [ 103.616396] ? watchdog_timer_fn.cold+0x5/0x25 [ 103.620968] ? watchdog_timer_fn+0x53e/0x580 [ 103.625364] watchdog_timer_fn.cold+0x16/0x25 [ 103.629845] __hrtimer_run_queues+0x3f6/0xe60 [ 103.634323] ? softlockup_fn+0xb0/0xb0 [ 103.638197] ? hrtimer_fixup_free+0xa0/0xa0 [ 103.642500] ? kvm_clock_get_cycles+0x14/0x30 [ 103.646971] ? ktime_get_update_offsets_now+0x2ec/0x460 [ 103.652318] hrtimer_interrupt+0x326/0x9e0 [ 103.656539] smp_apic_timer_interrupt+0x10c/0x550 [ 103.661363] apic_timer_interrupt+0xf/0x20 [ 103.665571] [ 103.667788] RIP: 0010:ktime_get+0x25f/0x2f0 [ 103.672118] Code: 48 c7 c0 88 82 f1 89 48 c1 e8 03 42 80 3c 20 00 0f 85 86 00 00 00 48 83 3d 25 ee 9c 08 00 74 35 e8 06 f1 0d 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 ce fe ff ff e8 f2 f0 0d 00 0f 0b e8 eb f0 0d 00 [ 103.690998] RSP: 0018:ffff8880b5a96bf0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 103.698683] RAX: ffff8880b5a82380 RBX: 0000000000000293 RCX: 1ffff11016b505b7 [ 103.705933] RDX: 0000000000000000 RSI: ffffffff8154946a RDI: 0000000000000293 [ 103.713181] RBP: fffffbfff13e3050 R08: ffffffff8cd35818 R09: 0000000000000000 [ 103.720429] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 103.727678] R13: 1ffffffff13e3052 R14: 0000000000000200 R15: 0000000000000001 [ 103.734936] ? ktime_get+0x25a/0x2f0 [ 103.738633] tcf_police_act+0x3e8/0xe60 [ 103.742589] ? tcf_police_dump+0x960/0x960 [ 103.746813] ? tcf_action_exec+0x16f/0x400 [ 103.751034] ? tcf_action_exec+0x12e/0x400 [ 103.755256] tcf_action_exec+0x160/0x400 [ 103.759305] basic_classify+0x184/0x2b0 [ 103.763294] tcf_classify+0x120/0x3c0 [ 103.767085] prio_enqueue+0x3bb/0x7a0 [ 103.770875] ? prio_reset+0x160/0x160 [ 103.774658] ? __dev_queue_xmit+0x134e/0x2e00 [ 103.779142] __dev_queue_xmit+0x140a/0x2e00 [ 103.783450] ? netdev_pick_tx+0x2f0/0x2f0 [ 103.787592] ? mark_held_locks+0xa6/0xf0 [ 103.791636] ? ip_finish_output2+0xfbc/0x15a0 [ 103.796117] ip_finish_output2+0xb6d/0x15a0 [ 103.800421] ? ip_send_check+0xb0/0xb0 [ 103.804303] ? ip_output+0x3a5/0x5f0 [ 103.808017] ip_finish_output+0xae9/0x10b0 [ 103.812246] ip_output+0x203/0x5f0 [ 103.815766] ? ip_mc_output+0xec0/0xec0 [ 103.819722] ? ip_fragment.constprop.0+0x240/0x240 [ 103.824633] ? prandom_u32+0x171/0x1f0 [ 103.828507] ip_local_out+0xaf/0x170 [ 103.832206] iptunnel_xmit+0x63b/0x9d0 [ 103.836074] ? erspan_changelink+0x150/0x220 [ 103.840466] geneve_xmit+0x120d/0x2e60 [ 103.844343] ? geneve_fill_metadata_dst+0x1580/0x1580 [ 103.849517] ? __lock_acquire+0x6de/0x3ff0 [ 103.853736] ? netif_skb_features+0x5c1/0xb30 [ 103.858216] ? check_preemption_disabled+0x41/0x280 [ 103.863218] dev_hard_start_xmit+0x1a8/0x920 [ 103.867611] __dev_queue_xmit+0x269d/0x2e00 [ 103.871916] ? netdev_pick_tx+0x2f0/0x2f0 [ 103.876045] ? ip6_finish_output2+0x113d/0x2290 [ 103.880699] ? memcpy+0x35/0x50 [ 103.883962] neigh_resolve_output+0x55a/0x910 [ 103.888440] ip6_finish_output2+0x113d/0x2290 [ 103.892918] ? ip6_forward_finish+0x4b0/0x4b0 [ 103.897395] ? lock_downgrade+0x720/0x720 [ 103.901521] ? lock_acquire+0x170/0x3c0 [ 103.905477] ? check_preemption_disabled+0x41/0x280 [ 103.910476] ip6_finish_output+0x89b/0x10f0 [ 103.914777] ip6_output+0x205/0x770 [ 103.918386] ? ip6_finish_output+0x10f0/0x10f0 [ 103.922949] ? ip6_fragment+0x34e0/0x34e0 [ 103.927082] ? check_preemption_disabled+0x41/0x280 [ 103.932085] ndisc_send_skb+0xa24/0x1720 [ 103.936131] ? ndisc_alloc_skb+0x320/0x320 [ 103.940346] ? ipv6_setsockopt+0x160/0x160 [ 103.944564] ? kmem_cache_alloc_node_trace+0x351/0x3b0 [ 103.949826] ? __alloc_skb+0x34f/0x560 [ 103.953694] ? skb_set_owner_w+0x1f6/0x330 [ 103.957911] ndisc_send_ns+0x51d/0x840 [ 103.961781] ? addrconf_dad_work+0xa48/0x10a0 [ 103.966259] ? pndisc_redo+0x20/0x20 [ 103.969955] ? mark_held_locks+0xa6/0xf0 [ 103.974000] ? __local_bh_enable_ip+0x159/0x270 [ 103.978653] addrconf_dad_work+0xb0e/0x10a0 [ 103.982966] ? addrconf_dad_completed+0xb60/0xb60 [ 103.987813] process_one_work+0x864/0x1570 [ 103.992050] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 103.996704] worker_thread+0x64c/0x1130 [ 104.000681] ? __kthread_parkme+0x133/0x1e0 [ 104.004980] ? process_one_work+0x1570/0x1570 [ 104.009456] kthread+0x33f/0x460 [ 104.012799] ? kthread_park+0x180/0x180 [ 104.016754] ret_from_fork+0x24/0x30 [ 104.020738] Kernel Offset: disabled [ 104.024395] Rebooting in 86400 seconds..