Starting Load/Save RF Kill Switch Status... [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.59' (ECDSA) to the list of known hosts. 2021/05/05 00:30:26 fuzzer started 2021/05/05 00:30:26 connecting to host at 10.128.0.169:44577 2021/05/05 00:30:26 checking machine... 2021/05/05 00:30:26 checking revisions... 2021/05/05 00:30:26 testing simple program... syzkaller login: [ 76.077647][ T8442] chnl_net:caif_netlink_parms(): no params data found [ 76.163668][ T8442] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.171568][ T8442] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.182279][ T8442] device bridge_slave_0 entered promiscuous mode [ 76.193956][ T8442] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.201432][ T8442] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.210440][ T8442] device bridge_slave_1 entered promiscuous mode [ 76.232763][ T8442] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.244730][ T8442] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.270206][ T8442] team0: Port device team_slave_0 added [ 76.277965][ T8442] team0: Port device team_slave_1 added [ 76.297718][ T8442] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.305527][ T8442] 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. [ 76.333602][ T8442] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.347168][ T8442] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.355337][ T8442] 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. [ 76.383669][ T8442] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.412422][ T8442] device hsr_slave_0 entered promiscuous mode [ 76.419343][ T8442] device hsr_slave_1 entered promiscuous mode [ 76.526261][ T8442] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.537701][ T8442] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.549656][ T8442] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.560749][ T8442] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.586366][ T8442] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.594194][ T8442] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.602866][ T8442] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.610240][ T8442] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.658070][ T8442] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.674513][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.686336][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.696728][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.706028][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.720497][ T8442] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.733074][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.742958][ T3319] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.750262][ T3319] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.764323][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.773390][ T3319] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.780496][ T3319] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.803378][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.812494][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.825821][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.843067][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.851437][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.861331][ T8442] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.881854][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 76.889918][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 76.904377][ T8442] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.925400][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 76.948371][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 76.957389][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 76.966594][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 76.979486][ T8442] device veth0_vlan entered promiscuous mode [ 76.992737][ T8442] device veth1_vlan entered promiscuous mode [ 77.016147][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 77.025249][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 77.034512][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.047221][ T8442] device veth0_macvtap entered promiscuous mode [ 77.060443][ T8442] device veth1_macvtap entered promiscuous mode [ 77.078126][ T8442] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.088287][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.099992][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.114136][ T8442] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.122642][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.131308][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.145272][ T8442] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.155448][ T8442] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.164538][ T8442] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.174765][ T8442] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 77.266899][ T121] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.282050][ T121] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.294403][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 77.334905][ T121] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.343715][ T121] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.353966][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/05 00:30:29 building call list... [ 78.039412][ T121] ------------[ cut here ]------------ [ 78.047879][ T121] hook not found, pf 3 num 0 [ 78.048543][ T121] WARNING: CPU: 0 PID: 121 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 78.068772][ T121] Modules linked in: [ 78.074435][ T121] CPU: 0 PID: 121 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0 [ 78.083103][ T121] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.095005][ T121] Workqueue: netns cleanup_net [ 78.099973][ T121] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.110335][ T121] 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 d8 6d 8a e8 70 4b 8a 01 <0f> 0b e9 e5 00 00 00 e8 89 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.133811][ T121] RSP: 0018:ffffc9000130fbc0 EFLAGS: 00010286 [ 78.140712][ T121] RAX: 0000000000000000 RBX: ffff888149fa1900 RCX: 0000000000000000 [ 78.149208][ T121] RDX: ffff88801274b880 RSI: ffffffff815c8ba5 RDI: fffff52000261f6a [ 78.159948][ T121] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.169282][ T121] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88801b798f20 [ 78.179628][ T121] R13: 0000000000000000 R14: ffff888024e1c780 R15: 0000000000000001 [ 78.188571][ T121] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 78.200272][ T121] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.208017][ T121] CR2: 00007f8d97acf000 CR3: 000000001fdb2000 CR4: 00000000001506f0 [ 78.221100][ T121] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.230493][ T121] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.242373][ T121] Call Trace: [ 78.245868][ T121] nf_unregister_net_hooks+0x117/0x160 [ 78.253653][ T121] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.259657][ T121] ? arptable_filter_net_exit+0x20/0x20 [ 78.267295][ T121] cleanup_net+0x451/0xb10 [ 78.274191][ T121] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.279933][ T121] process_one_work+0x98d/0x1600 [ 78.285954][ T121] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.296097][ T121] ? rwlock_bug.part.0+0x90/0x90 [ 78.302054][ T121] ? _raw_spin_lock_irq+0x41/0x50 [ 78.307515][ T121] worker_thread+0x64c/0x1120 [ 78.315168][ T121] ? process_one_work+0x1600/0x1600 [ 78.320635][ T121] kthread+0x3b1/0x4a0 [ 78.325605][ T121] ? __kthread_bind_mask+0xc0/0xc0 [ 78.331226][ T121] ret_from_fork+0x1f/0x30 [ 78.339973][ T121] Kernel panic - not syncing: panic_on_warn set ... [ 78.346806][ T121] CPU: 0 PID: 121 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0 [ 78.355248][ T121] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.365667][ T121] Workqueue: netns cleanup_net [ 78.370659][ T121] Call Trace: [ 78.373951][ T121] dump_stack+0x141/0x1d7 [ 78.378308][ T121] panic+0x306/0x73d [ 78.382390][ T121] ? __warn_printk+0xf3/0xf3 [ 78.387123][ T121] ? __warn.cold+0x1a/0x44 [ 78.391553][ T121] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.397612][ T121] __warn.cold+0x35/0x44 [ 78.401961][ T121] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.407787][ T121] report_bug+0x1bd/0x210 [ 78.412133][ T121] handle_bug+0x3c/0x60 [ 78.416300][ T121] exc_invalid_op+0x14/0x40 [ 78.421073][ T121] asm_exc_invalid_op+0x12/0x20 [ 78.426110][ T121] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.432451][ T121] 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 d8 6d 8a e8 70 4b 8a 01 <0f> 0b e9 e5 00 00 00 e8 89 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.452577][ T121] RSP: 0018:ffffc9000130fbc0 EFLAGS: 00010286 [ 78.458660][ T121] RAX: 0000000000000000 RBX: ffff888149fa1900 RCX: 0000000000000000 [ 78.466760][ T121] RDX: ffff88801274b880 RSI: ffffffff815c8ba5 RDI: fffff52000261f6a [ 78.474751][ T121] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.482857][ T121] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88801b798f20 [ 78.491133][ T121] R13: 0000000000000000 R14: ffff888024e1c780 R15: 0000000000000001 [ 78.501469][ T121] ? wake_up_klogd.part.0+0x8e/0xd0 [ 78.506706][ T121] ? vprintk+0x95/0x260 [ 78.511294][ T121] nf_unregister_net_hooks+0x117/0x160 [ 78.517094][ T121] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.523203][ T121] ? arptable_filter_net_exit+0x20/0x20 [ 78.528930][ T121] cleanup_net+0x451/0xb10 [ 78.533640][ T121] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.539135][ T121] process_one_work+0x98d/0x1600 [ 78.544114][ T121] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.549524][ T121] ? rwlock_bug.part.0+0x90/0x90 [ 78.554579][ T121] ? _raw_spin_lock_irq+0x41/0x50 [ 78.559719][ T121] worker_thread+0x64c/0x1120 [ 78.564431][ T121] ? process_one_work+0x1600/0x1600 [ 78.569911][ T121] kthread+0x3b1/0x4a0 [ 78.574011][ T121] ? __kthread_bind_mask+0xc0/0xc0 [ 78.579222][ T121] ret_from_fork+0x1f/0x30 [ 78.585124][ T121] Kernel Offset: disabled [ 78.589854][ T121] Rebooting in 86400 seconds..