[ OK ] Started Getty on tty4. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ 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. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.181' (ECDSA) to the list of known hosts. 2021/05/04 11:16:20 fuzzer started 2021/05/04 11:16:20 connecting to host at 10.128.0.169:46469 2021/05/04 11:16:20 checking machine... 2021/05/04 11:16:20 checking revisions... 2021/05/04 11:16:20 testing simple program... syzkaller login: [ 74.004075][ T8418] chnl_net:caif_netlink_parms(): no params data found [ 74.104667][ T8418] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.113059][ T8418] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.122724][ T8418] device bridge_slave_0 entered promiscuous mode [ 74.132691][ T8418] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.141049][ T8418] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.152115][ T8418] device bridge_slave_1 entered promiscuous mode [ 74.173957][ T8418] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.185400][ T8418] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.210980][ T8418] team0: Port device team_slave_0 added [ 74.220419][ T8418] team0: Port device team_slave_1 added [ 74.238281][ T8418] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.245861][ T8418] 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. [ 74.273389][ T8418] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.287341][ T8418] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.294505][ T8418] 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. [ 74.323063][ T8418] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.353082][ T8418] device hsr_slave_0 entered promiscuous mode [ 74.360113][ T8418] device hsr_slave_1 entered promiscuous mode [ 74.471491][ T8418] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 74.484045][ T8418] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 74.494497][ T8418] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 74.504835][ T8418] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 74.530900][ T8418] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.538538][ T8418] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.547599][ T8418] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.555312][ T8418] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.598407][ T8418] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.615755][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.629102][ T36] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.638152][ T36] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.648056][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.662503][ T8418] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.675307][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.684421][ T8638] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.692513][ T8638] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.709647][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.720891][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.728365][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.745997][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.755086][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.768256][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.786619][ T8418] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 74.798823][ T8418] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 74.811473][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.821845][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.831312][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.852185][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.861171][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.874630][ T8418] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.896320][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.916910][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.926205][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.935410][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.948555][ T8418] device veth0_vlan entered promiscuous mode [ 74.966308][ T8418] device veth1_vlan entered promiscuous mode [ 74.975671][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.000683][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 75.011850][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.022873][ T8418] device veth0_macvtap entered promiscuous mode [ 75.035869][ T8418] device veth1_macvtap entered promiscuous mode [ 75.055050][ T8418] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.063765][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 75.073018][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 75.083441][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 75.093258][ T8638] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.106283][ T8418] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.114801][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 75.123916][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 75.136935][ T8418] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.146462][ T8418] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.156058][ T8418] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.165802][ T8418] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 75.263442][ T213] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.282084][ T213] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.305314][ T3147] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 75.316857][ T213] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.326335][ T213] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.341443][ T4838] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/04 11:16:23 building call list... [ 76.003280][ T258] ------------[ cut here ]------------ [ 76.011359][ T258] hook not found, pf 3 num 0 [ 76.012238][ T258] WARNING: CPU: 0 PID: 258 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 76.033064][ T258] Modules linked in: [ 76.037058][ T258] CPU: 0 PID: 258 Comm: kworker/u4:5 Not tainted 5.12.0-syzkaller #0 [ 76.049073][ T258] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.062681][ T258] Workqueue: netns cleanup_net [ 76.067769][ T258] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.077778][ T258] Code: 0f b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 11 04 00 00 8b 53 1c 89 ee 48 c7 c7 c0 78 6d 8a e8 90 4a 8a 01 <0f> 0b e9 e5 00 00 00 e8 a9 46 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.100617][ T258] RSP: 0018:ffffc90001b1fbc0 EFLAGS: 00010286 [ 76.108019][ T258] RAX: 0000000000000000 RBX: ffff888021b2e300 RCX: 0000000000000000 [ 76.118763][ T258] RDX: ffff888012a4b880 RSI: ffffffff815c8ba5 RDI: fffff52000363f6a [ 76.139467][ T258] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.147770][ T258] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888019ec0f20 [ 76.157393][ T258] R13: 0000000000000000 R14: ffff8880156e3680 R15: 0000000000000001 [ 76.166384][ T258] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 76.176142][ T258] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.184091][ T258] CR2: 00007f59a3212010 CR3: 0000000022dff000 CR4: 00000000001506f0 [ 76.192988][ T258] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.203174][ T258] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.212229][ T258] Call Trace: [ 76.215560][ T258] nf_unregister_net_hooks+0x117/0x160 [ 76.222161][ T258] arpt_unregister_table_pre_exit+0x67/0x80 [ 76.228108][ T258] ? arptable_filter_net_exit+0x20/0x20 [ 76.235070][ T258] cleanup_net+0x451/0xb10 [ 76.241312][ T258] ? ops_free_list.part.0+0x3d0/0x3d0 [ 76.246918][ T258] process_one_work+0x98d/0x1600 [ 76.253273][ T258] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.258963][ T258] ? rwlock_bug.part.0+0x90/0x90 [ 76.265270][ T258] ? _raw_spin_lock_irq+0x41/0x50 [ 76.271542][ T258] worker_thread+0x64c/0x1120 [ 76.276470][ T258] ? process_one_work+0x1600/0x1600 [ 76.284815][ T258] kthread+0x3b1/0x4a0 [ 76.288939][ T258] ? __kthread_bind_mask+0xc0/0xc0 [ 76.295339][ T258] ret_from_fork+0x1f/0x30 [ 76.300688][ T258] Kernel panic - not syncing: panic_on_warn set ... [ 76.307385][ T258] CPU: 0 PID: 258 Comm: kworker/u4:5 Not tainted 5.12.0-syzkaller #0 [ 76.315474][ T258] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.325807][ T258] Workqueue: netns cleanup_net [ 76.330796][ T258] Call Trace: [ 76.334094][ T258] dump_stack+0x141/0x1d7 [ 76.338538][ T258] panic+0x306/0x73d [ 76.342455][ T258] ? __warn_printk+0xf3/0xf3 [ 76.347076][ T258] ? __warn.cold+0x1a/0x44 [ 76.351523][ T258] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.357886][ T258] __warn.cold+0x35/0x44 [ 76.362289][ T258] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.368291][ T258] report_bug+0x1bd/0x210 [ 76.372838][ T258] handle_bug+0x3c/0x60 [ 76.377284][ T258] exc_invalid_op+0x14/0x40 [ 76.382154][ T258] asm_exc_invalid_op+0x12/0x20 [ 76.387020][ T258] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.393546][ T258] Code: 0f b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 11 04 00 00 8b 53 1c 89 ee 48 c7 c7 c0 78 6d 8a e8 90 4a 8a 01 <0f> 0b e9 e5 00 00 00 e8 a9 46 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.413620][ T258] RSP: 0018:ffffc90001b1fbc0 EFLAGS: 00010286 [ 76.419705][ T258] RAX: 0000000000000000 RBX: ffff888021b2e300 RCX: 0000000000000000 [ 76.427879][ T258] RDX: ffff888012a4b880 RSI: ffffffff815c8ba5 RDI: fffff52000363f6a [ 76.436203][ T258] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.444751][ T258] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888019ec0f20 [ 76.453017][ T258] R13: 0000000000000000 R14: ffff8880156e3680 R15: 0000000000000001 [ 76.461097][ T258] ? wake_up_klogd.part.0+0x8e/0xd0 [ 76.466417][ T258] ? vprintk+0x95/0x260 [ 76.470614][ T258] nf_unregister_net_hooks+0x117/0x160 [ 76.476381][ T258] arpt_unregister_table_pre_exit+0x67/0x80 [ 76.482308][ T258] ? arptable_filter_net_exit+0x20/0x20 [ 76.488235][ T258] cleanup_net+0x451/0xb10 [ 76.492939][ T258] ? ops_free_list.part.0+0x3d0/0x3d0 [ 76.498342][ T258] process_one_work+0x98d/0x1600 [ 76.503488][ T258] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.508894][ T258] ? rwlock_bug.part.0+0x90/0x90 [ 76.513882][ T258] ? _raw_spin_lock_irq+0x41/0x50 [ 76.519035][ T258] worker_thread+0x64c/0x1120 [ 76.523877][ T258] ? process_one_work+0x1600/0x1600 [ 76.529253][ T258] kthread+0x3b1/0x4a0 [ 76.533587][ T258] ? __kthread_bind_mask+0xc0/0xc0 [ 76.538828][ T258] ret_from_fork+0x1f/0x30 [ 76.545321][ T258] Kernel Offset: disabled [ 76.550356][ T258] Rebooting in 86400 seconds..