[ 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 '10.128.15.209' (ECDSA) to the list of known hosts. syzkaller login: [ 85.436902] IPVS: ftp: loaded support on port[0] = 21 [ 85.508393] chnl_net:caif_netlink_parms(): no params data found [ 85.585518] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.592080] bridge0: port 1(bridge_slave_0) entered disabled state [ 85.600544] device bridge_slave_0 entered promiscuous mode [ 85.608196] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.614656] bridge0: port 2(bridge_slave_1) entered disabled state [ 85.621599] device bridge_slave_1 entered promiscuous mode [ 85.638893] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 85.647904] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 85.666156] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 85.673856] team0: Port device team_slave_0 added [ 85.679995] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 85.687704] team0: Port device team_slave_1 added [ 85.703205] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 85.709512] 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. [ 85.735647] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 85.748092] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 85.755240] 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. [ 85.784142] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 85.798692] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 85.806653] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 85.826097] device hsr_slave_0 entered promiscuous mode [ 85.831818] device hsr_slave_1 entered promiscuous mode [ 85.838740] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 85.847069] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 85.912553] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.919000] bridge0: port 2(bridge_slave_1) entered forwarding state [ 85.925949] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.932309] bridge0: port 1(bridge_slave_0) entered forwarding state [ 85.961985] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 85.969709] 8021q: adding VLAN 0 to HW filter on device bond0 [ 85.979324] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 85.988359] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 85.997193] bridge0: port 1(bridge_slave_0) entered disabled state [ 86.004203] bridge0: port 2(bridge_slave_1) entered disabled state [ 86.011162] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 86.021841] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 86.028091] 8021q: adding VLAN 0 to HW filter on device team0 [ 86.037725] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 86.045389] bridge0: port 1(bridge_slave_0) entered blocking state [ 86.051719] bridge0: port 1(bridge_slave_0) entered forwarding state [ 86.072515] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 86.082442] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 86.093820] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 86.100957] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 86.108901] bridge0: port 2(bridge_slave_1) entered blocking state [ 86.115300] bridge0: port 2(bridge_slave_1) entered forwarding state [ 86.123072] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 86.131030] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 86.138854] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 86.146714] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 86.154288] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 86.161061] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 86.175944] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 86.183173] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 86.189967] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 86.201172] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 86.234865] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 86.245383] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 86.273238] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 86.281137] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 86.288852] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 86.298263] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 86.306347] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 86.313168] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 86.322234] device veth0_vlan entered promiscuous mode [ 86.331048] device veth1_vlan entered promiscuous mode [ 86.337326] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 86.347052] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 86.358492] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 86.367581] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 86.376085] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 86.383219] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 86.393011] device veth0_macvtap entered promiscuous mode [ 86.399355] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 86.408041] device veth1_macvtap entered promiscuous mode [ 86.417285] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 86.426166] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 86.436868] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 86.443506] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 86.452301] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 86.461761] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 86.469216] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 111.220586] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/0:0:5] [ 111.227900] Modules linked in: [ 111.231072] irq event stamp: 55700573 [ 111.234855] hardirqs last enabled at (55700572): [] ktime_get+0x235/0x2f0 [ 111.243409] hardirqs last disabled at (55700573): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 111.253094] softirqs last enabled at (4014): [] icmp6_dst_alloc+0x3de/0x660 [ 111.261842] softirqs last disabled at (4016): [] ip6_finish_output2+0x1f2/0x2290 [ 111.270917] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 4.19.211-syzkaller #0 [ 111.278694] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 111.288036] Workqueue: ipv6_addrconf addrconf_dad_work [ 111.293294] RIP: 0010:tcf_police_act+0x180/0xe60 [ 111.298029] Code: b7 7d 06 e8 82 f0 d5 fa 4c 8d 6d 28 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 14 02 4c 89 e8 83 e0 07 83 c0 03 <38> d0 7c 08 84 d2 0f 85 47 0a 00 00 48 8d 7b 48 44 8b 45 28 48 b9 [ 111.317191] RSP: 0018:ffff8880b5a2ec40 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 [ 111.324971] RAX: 0000000000000003 RBX: ffff8880aa095a40 RCX: ffffffff868c94a9 [ 111.332222] RDX: 0000000000000000 RSI: ffffffff868c94ee RDI: 0000000000000003 [ 111.339492] RBP: ffff8880b276fb80 R08: 0000000000000001 R09: 0000000000000000 [ 111.346831] R10: 0000000000000003 R11: ffffffff8c66501b R12: 1ffff11016b45d8d [ 111.354092] R13: ffff8880b276fba8 R14: ffff8880aa095ab0 R15: 0000000000000001 [ 111.361343] FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 111.369564] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 111.375467] CR2: 00007f5ae3cf3390 CR3: 0000000009e6d000 CR4: 00000000003406f0 [ 111.382720] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 111.389973] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 111.397254] Call Trace: [ 111.399833] ? tcf_police_dump+0x960/0x960 [ 111.404056] ? tcf_action_exec+0x16f/0x400 [ 111.408274] tcf_action_exec+0x160/0x400 [ 111.412321] basic_classify+0x184/0x2b0 [ 111.416276] tcf_classify+0x120/0x3c0 [ 111.420098] prio_enqueue+0x3bb/0x7a0 [ 111.423943] ? prio_reset+0x160/0x160 [ 111.427760] ? __dev_queue_xmit+0x134e/0x2e00 [ 111.432243] __dev_queue_xmit+0x140a/0x2e00 [ 111.436652] ? netdev_pick_tx+0x2f0/0x2f0 [ 111.440877] ? mark_held_locks+0xa6/0xf0 [ 111.444921] ? ip_finish_output2+0xfbc/0x15a0 [ 111.449400] ip_finish_output2+0xb6d/0x15a0 [ 111.453730] ? ip_send_check+0xb0/0xb0 [ 111.457609] ? ip_output+0x3a5/0x5f0 [ 111.461309] ip_finish_output+0xae9/0x10b0 [ 111.465524] ip_output+0x203/0x5f0 [ 111.469044] ? ip_mc_output+0xec0/0xec0 [ 111.472998] ? ip_fragment.constprop.0+0x240/0x240 [ 111.477909] ? prandom_u32+0x171/0x1f0 [ 111.481779] ip_local_out+0xaf/0x170 [ 111.485581] iptunnel_xmit+0x63b/0x9d0 [ 111.489468] ? erspan_changelink+0x150/0x220 [ 111.493908] geneve_xmit+0x120d/0x2e60 [ 111.497799] ? geneve_fill_metadata_dst+0x1580/0x1580 [ 111.502999] ? __lock_acquire+0x6de/0x3ff0 [ 111.507223] ? netif_skb_features+0x5c1/0xb30 [ 111.511744] ? check_preemption_disabled+0x41/0x280 [ 111.516764] dev_hard_start_xmit+0x1a8/0x920 [ 111.521159] __dev_queue_xmit+0x269d/0x2e00 [ 111.525468] ? netdev_pick_tx+0x2f0/0x2f0 [ 111.529608] ? ip6_finish_output2+0x113d/0x2290 [ 111.534282] ? memcpy+0x35/0x50 [ 111.537545] neigh_resolve_output+0x55a/0x910 [ 111.542028] ip6_finish_output2+0x113d/0x2290 [ 111.546507] ? ip6_forward_finish+0x4b0/0x4b0 [ 111.551004] ? lock_downgrade+0x720/0x720 [ 111.555132] ? lock_acquire+0x170/0x3c0 [ 111.559090] ? check_preemption_disabled+0x41/0x280 [ 111.564090] ip6_finish_output+0x89b/0x10f0 [ 111.568424] ip6_output+0x205/0x770 [ 111.572035] ? ip6_finish_output+0x10f0/0x10f0 [ 111.576604] ? ip6_fragment+0x34e0/0x34e0 [ 111.580736] ? check_preemption_disabled+0x41/0x280 [ 111.585737] ndisc_send_skb+0xa24/0x1720 [ 111.589783] ? ndisc_alloc_skb+0x320/0x320 [ 111.593998] ? ipv6_setsockopt+0x160/0x160 [ 111.598218] ? kmem_cache_alloc_node_trace+0x351/0x3b0 [ 111.603478] ? __alloc_skb+0x34f/0x560 [ 111.607345] ? skb_set_owner_w+0x1f6/0x330 [ 111.611563] ndisc_send_ns+0x51d/0x840 [ 111.615432] ? addrconf_dad_work+0xa48/0x10a0 [ 111.619906] ? pndisc_redo+0x20/0x20 [ 111.623602] ? mark_held_locks+0xa6/0xf0 [ 111.627648] ? __local_bh_enable_ip+0x159/0x270 [ 111.632298] addrconf_dad_work+0xb0e/0x10a0 [ 111.636694] ? addrconf_dad_completed+0xb60/0xb60 [ 111.641542] process_one_work+0x864/0x1570 [ 111.645763] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 111.650435] worker_thread+0x64c/0x1130 [ 111.654503] ? process_one_work+0x1570/0x1570 [ 111.658984] kthread+0x33f/0x460 [ 111.662330] ? kthread_park+0x180/0x180 [ 111.666289] ret_from_fork+0x24/0x30 [ 111.669989] Kernel panic - not syncing: softlockup: hung tasks [ 111.675941] CPU: 0 PID: 5 Comm: kworker/0:0 Tainted: G L 4.19.211-syzkaller #0 [ 111.685274] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 111.694617] Workqueue: ipv6_addrconf addrconf_dad_work [ 111.699876] Call Trace: [ 111.702449] [ 111.704582] dump_stack+0x1fc/0x2ef [ 111.708192] panic+0x26a/0x50e [ 111.711367] ? __warn_printk+0xf3/0xf3 [ 111.715240] ? watchdog_timer_fn.cold+0x5/0x25 [ 111.719823] ? watchdog_timer_fn+0x53e/0x580 [ 111.724219] watchdog_timer_fn.cold+0x16/0x25 [ 111.728712] __hrtimer_run_queues+0x3f6/0xe60 [ 111.733212] ? softlockup_fn+0xb0/0xb0 [ 111.737084] ? hrtimer_fixup_free+0xa0/0xa0 [ 111.741387] ? kvm_clock_get_cycles+0x14/0x30 [ 111.745889] ? ktime_get_update_offsets_now+0x2ec/0x460 [ 111.751246] hrtimer_interrupt+0x326/0x9e0 [ 111.755473] smp_apic_timer_interrupt+0x10c/0x550 [ 111.760307] apic_timer_interrupt+0xf/0x20 [ 111.764522] [ 111.766755] RIP: 0010:tcf_police_act+0x180/0xe60 [ 111.771516] Code: b7 7d 06 e8 82 f0 d5 fa 4c 8d 6d 28 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 14 02 4c 89 e8 83 e0 07 83 c0 03 <38> d0 7c 08 84 d2 0f 85 47 0a 00 00 48 8d 7b 48 44 8b 45 28 48 b9 [ 111.790398] RSP: 0018:ffff8880b5a2ec40 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 [ 111.798091] RAX: 0000000000000003 RBX: ffff8880aa095a40 RCX: ffffffff868c94a9 [ 111.805346] RDX: 0000000000000000 RSI: ffffffff868c94ee RDI: 0000000000000003 [ 111.812594] RBP: ffff8880b276fb80 R08: 0000000000000001 R09: 0000000000000000 [ 111.819868] R10: 0000000000000003 R11: ffffffff8c66501b R12: 1ffff11016b45d8d [ 111.827119] R13: ffff8880b276fba8 R14: ffff8880aa095ab0 R15: 0000000000000001 [ 111.834377] ? tcf_police_act+0x119/0xe60 [ 111.838506] ? tcf_police_act+0x15e/0xe60 [ 111.842640] ? tcf_police_dump+0x960/0x960 [ 111.846865] ? tcf_action_exec+0x16f/0x400 [ 111.851367] tcf_action_exec+0x160/0x400 [ 111.855412] basic_classify+0x184/0x2b0 [ 111.859372] tcf_classify+0x120/0x3c0 [ 111.863172] prio_enqueue+0x3bb/0x7a0 [ 111.866971] ? prio_reset+0x160/0x160 [ 111.870776] ? __dev_queue_xmit+0x134e/0x2e00 [ 111.875259] __dev_queue_xmit+0x140a/0x2e00 [ 111.879576] ? netdev_pick_tx+0x2f0/0x2f0 [ 111.883712] ? mark_held_locks+0xa6/0xf0 [ 111.887771] ? ip_finish_output2+0xfbc/0x15a0 [ 111.892248] ip_finish_output2+0xb6d/0x15a0 [ 111.896552] ? ip_send_check+0xb0/0xb0 [ 111.900420] ? ip_output+0x3a5/0x5f0 [ 111.904117] ip_finish_output+0xae9/0x10b0 [ 111.908358] ip_output+0x203/0x5f0 [ 111.911896] ? ip_mc_output+0xec0/0xec0 [ 111.915852] ? ip_fragment.constprop.0+0x240/0x240 [ 111.920762] ? prandom_u32+0x171/0x1f0 [ 111.924638] ip_local_out+0xaf/0x170 [ 111.928353] iptunnel_xmit+0x63b/0x9d0 [ 111.932245] ? erspan_changelink+0x150/0x220 [ 111.936655] geneve_xmit+0x120d/0x2e60 [ 111.940542] ? geneve_fill_metadata_dst+0x1580/0x1580 [ 111.945744] ? __lock_acquire+0x6de/0x3ff0 [ 111.949979] ? netif_skb_features+0x5c1/0xb30 [ 111.954476] ? check_preemption_disabled+0x41/0x280 [ 111.959491] dev_hard_start_xmit+0x1a8/0x920 [ 111.963899] __dev_queue_xmit+0x269d/0x2e00 [ 111.968205] ? netdev_pick_tx+0x2f0/0x2f0 [ 111.972337] ? ip6_finish_output2+0x113d/0x2290 [ 111.976990] ? memcpy+0x35/0x50 [ 111.980253] neigh_resolve_output+0x55a/0x910 [ 111.984746] ip6_finish_output2+0x113d/0x2290 [ 111.989226] ? ip6_forward_finish+0x4b0/0x4b0 [ 111.993703] ? lock_downgrade+0x720/0x720 [ 111.997835] ? lock_acquire+0x170/0x3c0 [ 112.001796] ? check_preemption_disabled+0x41/0x280 [ 112.006799] ip6_finish_output+0x89b/0x10f0 [ 112.011103] ip6_output+0x205/0x770 [ 112.014713] ? ip6_finish_output+0x10f0/0x10f0 [ 112.019282] ? ip6_fragment+0x34e0/0x34e0 [ 112.023412] ? check_preemption_disabled+0x41/0x280 [ 112.028419] ndisc_send_skb+0xa24/0x1720 [ 112.032466] ? ndisc_alloc_skb+0x320/0x320 [ 112.036684] ? ipv6_setsockopt+0x160/0x160 [ 112.040903] ? kmem_cache_alloc_node_trace+0x351/0x3b0 [ 112.046164] ? __alloc_skb+0x34f/0x560 [ 112.050034] ? skb_set_owner_w+0x1f6/0x330 [ 112.054250] ndisc_send_ns+0x51d/0x840 [ 112.058121] ? addrconf_dad_work+0xa48/0x10a0 [ 112.062598] ? pndisc_redo+0x20/0x20 [ 112.066292] ? mark_held_locks+0xa6/0xf0 [ 112.070330] ? __local_bh_enable_ip+0x159/0x270 [ 112.074980] addrconf_dad_work+0xb0e/0x10a0 [ 112.079285] ? addrconf_dad_completed+0xb60/0xb60 [ 112.084113] process_one_work+0x864/0x1570 [ 112.088333] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 112.092985] worker_thread+0x64c/0x1130 [ 112.096946] ? process_one_work+0x1570/0x1570 [ 112.101437] kthread+0x33f/0x460 [ 112.104786] ? kthread_park+0x180/0x180 [ 112.108743] ret_from_fork+0x24/0x30 [ 112.112744] Kernel Offset: disabled [ 112.116406] Rebooting in 86400 seconds..