[ 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 '10.128.0.191' (ECDSA) to the list of known hosts. syzkaller login: [ 81.234408] IPVS: ftp: loaded support on port[0] = 21 [ 81.307362] chnl_net:caif_netlink_parms(): no params data found [ 81.380977] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.387712] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.395008] device bridge_slave_0 entered promiscuous mode [ 81.402145] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.408605] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.415939] device bridge_slave_1 entered promiscuous mode [ 81.433148] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 81.441929] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 81.460638] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 81.468053] team0: Port device team_slave_0 added [ 81.473444] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 81.481612] team0: Port device team_slave_1 added [ 81.497850] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 81.504092] 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. [ 81.529988] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 81.541686] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 81.548465] 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. [ 81.574157] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 81.588564] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 81.596835] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 81.616845] device hsr_slave_0 entered promiscuous mode [ 81.622544] device hsr_slave_1 entered promiscuous mode [ 81.628963] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 81.636228] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 81.699749] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.706177] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.712932] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.719333] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.749293] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 81.757153] 8021q: adding VLAN 0 to HW filter on device bond0 [ 81.765778] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 81.773916] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 81.783698] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.792222] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.799581] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 81.810279] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 81.816811] 8021q: adding VLAN 0 to HW filter on device team0 [ 81.826422] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 81.834026] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.840495] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.850523] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 81.858951] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.865344] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.881239] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 81.889021] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 81.899290] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 81.912426] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 81.923067] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 81.933930] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 81.940846] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 81.948742] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 81.956458] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 81.968643] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 81.976884] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 81.983529] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 81.994766] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 82.029349] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 82.039214] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 82.070939] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 82.078272] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 82.085940] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 82.096061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 82.103544] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 82.110599] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 82.119158] device veth0_vlan entered promiscuous mode [ 82.129204] device veth1_vlan entered promiscuous mode [ 82.135745] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 82.143937] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 82.156516] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 82.166385] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 82.173592] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 82.182138] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 82.192113] device veth0_macvtap entered promiscuous mode [ 82.198529] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 82.207057] device veth1_macvtap entered promiscuous mode [ 82.216382] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 82.226985] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 82.236798] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 82.243488] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 82.252482] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 82.262417] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 82.269212] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 107.149773] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/1:0:19] [ 107.157161] Modules linked in: [ 107.160336] irq event stamp: 55674799 [ 107.164122] hardirqs last enabled at (55674798): [] ktime_get+0x235/0x2f0 [ 107.172681] hardirqs last disabled at (55674799): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 107.182369] softirqs last enabled at (7674): [] icmp6_dst_alloc+0x3de/0x660 [ 107.191099] softirqs last disabled at (7676): [] ip6_finish_output2+0x1f2/0x2290 [ 107.200767] CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 4.19.211-syzkaller #0 [ 107.208102] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 107.217445] Workqueue: ipv6_addrconf addrconf_dad_work [ 107.222707] RIP: 0010:write_comp_data+0x23/0x70 [ 107.227355] Code: 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df 01 00 65 8b 05 7a 59 9f 7e a9 00 01 1f 00 75 4f 8b 86 60 13 00 00 <83> f8 03 75 44 48 8b 86 68 13 00 00 8b b6 64 13 00 00 48 8b 38 48 [ 107.246239] RSP: 0018:ffff8880b5ad6c38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 107.253931] RAX: 0000000000000000 RBX: ffff888098363ac0 RCX: ffffffff868c94a9 [ 107.261206] RDX: 0000000000000000 RSI: ffff8880b5abc500 RDI: 0000000000000003 [ 107.268455] RBP: ffff88809b1a12c0 R08: 0000000000000001 R09: 0000000000000000 [ 107.275704] R10: 0000000000000003 R11: ffffffff8c66505b R12: 1ffff11016b5ad8d [ 107.282954] R13: ffff8880978a13c0 R14: ffff888098363b30 R15: 0000000000000001 [ 107.290207] FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 107.298412] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 107.304272] CR2: 00007f23d35313a0 CR3: 0000000009e6d000 CR4: 00000000003406e0 [ 107.311525] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 107.318772] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 107.326027] Call Trace: [ 107.328599] tcf_police_act+0x119/0xe60 [ 107.332558] ? tcf_police_dump+0x960/0x960 [ 107.336779] ? tcf_police_act+0x7b9/0xe60 [ 107.340910] tcf_action_exec+0x160/0x400 [ 107.344953] basic_classify+0x184/0x2b0 [ 107.348910] tcf_classify+0x120/0x3c0 [ 107.352692] prio_enqueue+0x3bb/0x7a0 [ 107.356473] ? prio_reset+0x160/0x160 [ 107.360256] ? __dev_queue_xmit+0x134e/0x2e00 [ 107.364734] __dev_queue_xmit+0x140a/0x2e00 [ 107.369040] ? netdev_pick_tx+0x2f0/0x2f0 [ 107.373178] ? mark_held_locks+0xa6/0xf0 [ 107.377217] ? ip_finish_output2+0xfbc/0x15a0 [ 107.381694] ip_finish_output2+0xb6d/0x15a0 [ 107.385997] ? ip_send_check+0xb0/0xb0 [ 107.389862] ? ip_output+0x3a5/0x5f0 [ 107.393561] ip_finish_output+0xae9/0x10b0 [ 107.397777] ip_output+0x203/0x5f0 [ 107.401296] ? ip_mc_output+0xec0/0xec0 [ 107.405253] ? ip_fragment.constprop.0+0x240/0x240 [ 107.410164] ? prandom_u32+0x171/0x1f0 [ 107.414036] ip_local_out+0xaf/0x170 [ 107.417733] iptunnel_xmit+0x63b/0x9d0 [ 107.421602] ? erspan_changelink+0x150/0x220 [ 107.425996] geneve_xmit+0x120d/0x2e60 [ 107.429875] ? geneve_fill_metadata_dst+0x1580/0x1580 [ 107.435055] ? __lock_acquire+0x6de/0x3ff0 [ 107.439272] ? netif_skb_features+0x5c1/0xb30 [ 107.443750] ? check_preemption_disabled+0x41/0x280 [ 107.448752] dev_hard_start_xmit+0x1a8/0x920 [ 107.453145] __dev_queue_xmit+0x269d/0x2e00 [ 107.457451] ? netdev_pick_tx+0x2f0/0x2f0 [ 107.461582] ? ip6_finish_output2+0x113d/0x2290 [ 107.466243] ? memcpy+0x35/0x50 [ 107.469506] neigh_resolve_output+0x55a/0x910 [ 107.474064] ip6_finish_output2+0x113d/0x2290 [ 107.478568] ? ip6_forward_finish+0x4b0/0x4b0 [ 107.483389] ? lock_downgrade+0x720/0x720 [ 107.487520] ? lock_acquire+0x170/0x3c0 [ 107.491478] ? check_preemption_disabled+0x41/0x280 [ 107.496487] ip6_finish_output+0x89b/0x10f0 [ 107.500791] ip6_output+0x205/0x770 [ 107.504399] ? ip6_finish_output+0x10f0/0x10f0 [ 107.508963] ? ip6_fragment+0x34e0/0x34e0 [ 107.513093] ? check_preemption_disabled+0x41/0x280 [ 107.518093] ndisc_send_skb+0xa24/0x1720 [ 107.522153] ? ndisc_alloc_skb+0x320/0x320 [ 107.526368] ? ipv6_setsockopt+0x160/0x160 [ 107.530589] ? kmem_cache_alloc_node_trace+0x351/0x3b0 [ 107.535849] ? __alloc_skb+0x34f/0x560 [ 107.539730] ? skb_set_owner_w+0x1f6/0x330 [ 107.543952] ndisc_send_ns+0x51d/0x840 [ 107.547824] ? addrconf_dad_work+0xa48/0x10a0 [ 107.552299] ? pndisc_redo+0x20/0x20 [ 107.555995] ? mark_held_locks+0xa6/0xf0 [ 107.560035] ? __local_bh_enable_ip+0x159/0x270 [ 107.564687] addrconf_dad_work+0xb0e/0x10a0 [ 107.568993] ? addrconf_dad_completed+0xb60/0xb60 [ 107.573818] process_one_work+0x864/0x1570 [ 107.578037] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 107.583132] worker_thread+0x64c/0x1130 [ 107.587108] ? process_one_work+0x1570/0x1570 [ 107.591587] kthread+0x33f/0x460 [ 107.594940] ? kthread_park+0x180/0x180 [ 107.598910] ret_from_fork+0x24/0x30 [ 107.602615] Kernel panic - not syncing: softlockup: hung tasks [ 107.608572] CPU: 1 PID: 19 Comm: kworker/1:0 Tainted: G L 4.19.211-syzkaller #0 [ 107.617299] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 107.626645] Workqueue: ipv6_addrconf addrconf_dad_work [ 107.631900] Call Trace: [ 107.634462] [ 107.636597] dump_stack+0x1fc/0x2ef [ 107.640205] panic+0x26a/0x50e [ 107.643382] ? __warn_printk+0xf3/0xf3 [ 107.647257] ? watchdog_timer_fn.cold+0x5/0x25 [ 107.651818] ? watchdog_timer_fn+0x53e/0x580 [ 107.656211] watchdog_timer_fn.cold+0x16/0x25 [ 107.660690] __hrtimer_run_queues+0x3f6/0xe60 [ 107.665206] ? softlockup_fn+0xb0/0xb0 [ 107.669077] ? hrtimer_fixup_free+0xa0/0xa0 [ 107.673379] ? kvm_clock_get_cycles+0x14/0x30 [ 107.677855] ? ktime_get_update_offsets_now+0x2ec/0x460 [ 107.683635] hrtimer_interrupt+0x326/0x9e0 [ 107.687856] smp_apic_timer_interrupt+0x10c/0x550 [ 107.692683] apic_timer_interrupt+0xf/0x20 [ 107.696894] [ 107.699118] RIP: 0010:write_comp_data+0x23/0x70 [ 107.703768] Code: 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df 01 00 65 8b 05 7a 59 9f 7e a9 00 01 1f 00 75 4f 8b 86 60 13 00 00 <83> f8 03 75 44 48 8b 86 68 13 00 00 8b b6 64 13 00 00 48 8b 38 48 [ 107.722648] RSP: 0018:ffff8880b5ad6c38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 107.730346] RAX: 0000000000000000 RBX: ffff888098363ac0 RCX: ffffffff868c94a9 [ 107.737622] RDX: 0000000000000000 RSI: ffff8880b5abc500 RDI: 0000000000000003 [ 107.744872] RBP: ffff88809b1a12c0 R08: 0000000000000001 R09: 0000000000000000 [ 107.752381] R10: 0000000000000003 R11: ffffffff8c66505b R12: 1ffff11016b5ad8d [ 107.759629] R13: ffff8880978a13c0 R14: ffff888098363b30 R15: 0000000000000001 [ 107.766892] ? tcf_police_act+0x119/0xe60 [ 107.771027] tcf_police_act+0x119/0xe60 [ 107.774983] ? tcf_police_dump+0x960/0x960 [ 107.779202] ? tcf_police_act+0x7b9/0xe60 [ 107.783332] tcf_action_exec+0x160/0x400 [ 107.787376] basic_classify+0x184/0x2b0 [ 107.791336] tcf_classify+0x120/0x3c0 [ 107.795121] prio_enqueue+0x3bb/0x7a0 [ 107.798903] ? prio_reset+0x160/0x160 [ 107.802683] ? __dev_queue_xmit+0x134e/0x2e00 [ 107.807164] __dev_queue_xmit+0x140a/0x2e00 [ 107.811903] ? netdev_pick_tx+0x2f0/0x2f0 [ 107.816038] ? mark_held_locks+0xa6/0xf0 [ 107.820080] ? ip_finish_output2+0xfbc/0x15a0 [ 107.824557] ip_finish_output2+0xb6d/0x15a0 [ 107.828863] ? ip_send_check+0xb0/0xb0 [ 107.832728] ? ip_output+0x3a5/0x5f0 [ 107.836424] ip_finish_output+0xae9/0x10b0 [ 107.840642] ip_output+0x203/0x5f0 [ 107.844166] ? ip_mc_output+0xec0/0xec0 [ 107.848122] ? ip_fragment.constprop.0+0x240/0x240 [ 107.853034] ? prandom_u32+0x171/0x1f0 [ 107.856900] ip_local_out+0xaf/0x170 [ 107.860596] iptunnel_xmit+0x63b/0x9d0 [ 107.864464] ? erspan_changelink+0x150/0x220 [ 107.868853] geneve_xmit+0x120d/0x2e60 [ 107.872728] ? geneve_fill_metadata_dst+0x1580/0x1580 [ 107.877902] ? __lock_acquire+0x6de/0x3ff0 [ 107.882119] ? netif_skb_features+0x5c1/0xb30 [ 107.886598] ? check_preemption_disabled+0x41/0x280 [ 107.891599] dev_hard_start_xmit+0x1a8/0x920 [ 107.895992] __dev_queue_xmit+0x269d/0x2e00 [ 107.900300] ? netdev_pick_tx+0x2f0/0x2f0 [ 107.904429] ? ip6_finish_output2+0x113d/0x2290 [ 107.909083] ? memcpy+0x35/0x50 [ 107.912345] neigh_resolve_output+0x55a/0x910 [ 107.916822] ip6_finish_output2+0x113d/0x2290 [ 107.921304] ? ip6_forward_finish+0x4b0/0x4b0 [ 107.925782] ? lock_downgrade+0x720/0x720 [ 107.929911] ? lock_acquire+0x170/0x3c0 [ 107.933870] ? check_preemption_disabled+0x41/0x280 [ 107.938868] ip6_finish_output+0x89b/0x10f0 [ 107.943198] ip6_output+0x205/0x770 [ 107.946891] ? ip6_finish_output+0x10f0/0x10f0 [ 107.951543] ? ip6_fragment+0x34e0/0x34e0 [ 107.955672] ? check_preemption_disabled+0x41/0x280 [ 107.960698] ndisc_send_skb+0xa24/0x1720 [ 107.964744] ? ndisc_alloc_skb+0x320/0x320 [ 107.968959] ? ipv6_setsockopt+0x160/0x160 [ 107.973176] ? kmem_cache_alloc_node_trace+0x351/0x3b0 [ 107.978435] ? __alloc_skb+0x34f/0x560 [ 107.982306] ? skb_set_owner_w+0x1f6/0x330 [ 107.986526] ndisc_send_ns+0x51d/0x840 [ 107.990412] ? addrconf_dad_work+0xa48/0x10a0 [ 107.994888] ? pndisc_redo+0x20/0x20 [ 107.998583] ? mark_held_locks+0xa6/0xf0 [ 108.002627] ? __local_bh_enable_ip+0x159/0x270 [ 108.007279] addrconf_dad_work+0xb0e/0x10a0 [ 108.011589] ? addrconf_dad_completed+0xb60/0xb60 [ 108.016414] process_one_work+0x864/0x1570 [ 108.020635] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 108.025290] worker_thread+0x64c/0x1130 [ 108.029249] ? process_one_work+0x1570/0x1570 [ 108.033722] kthread+0x33f/0x460 [ 108.037067] ? kthread_park+0x180/0x180 [ 108.041024] ret_from_fork+0x24/0x30 [ 108.045008] Kernel Offset: disabled [ 108.048673] Rebooting in 86400 seconds..