[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ 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 '10.128.0.15' (ECDSA) to the list of known hosts. 2021/05/03 15:19:23 fuzzer started 2021/05/03 15:19:24 connecting to host at 10.128.0.169:44305 2021/05/03 15:19:24 checking machine... 2021/05/03 15:19:24 checking revisions... 2021/05/03 15:19:24 testing simple program... syzkaller login: [ 84.474490][ T8433] chnl_net:caif_netlink_parms(): no params data found [ 84.539220][ T8433] bridge0: port 1(bridge_slave_0) entered blocking state [ 84.548479][ T8433] bridge0: port 1(bridge_slave_0) entered disabled state [ 84.558975][ T8433] device bridge_slave_0 entered promiscuous mode [ 84.569336][ T8433] bridge0: port 2(bridge_slave_1) entered blocking state [ 84.578021][ T8433] bridge0: port 2(bridge_slave_1) entered disabled state [ 84.587520][ T8433] device bridge_slave_1 entered promiscuous mode [ 84.609591][ T8433] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 84.621255][ T8433] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 84.645597][ T8433] team0: Port device team_slave_0 added [ 84.653760][ T8433] team0: Port device team_slave_1 added [ 84.670738][ T8433] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 84.678177][ T8433] 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. [ 84.707105][ T8433] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 84.720075][ T8433] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 84.727283][ T8433] 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. [ 84.754232][ T8433] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 84.782985][ T8433] device hsr_slave_0 entered promiscuous mode [ 84.791648][ T8433] device hsr_slave_1 entered promiscuous mode [ 84.918642][ T8433] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 84.939743][ T8433] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 84.956494][ T8433] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 84.968810][ T8433] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 85.008891][ T8433] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.016880][ T8433] bridge0: port 2(bridge_slave_1) entered forwarding state [ 85.026344][ T8433] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.033742][ T8433] bridge0: port 1(bridge_slave_0) entered forwarding state [ 85.086137][ T8433] 8021q: adding VLAN 0 to HW filter on device bond0 [ 85.102564][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 85.117548][ T20] bridge0: port 1(bridge_slave_0) entered disabled state [ 85.128051][ T20] bridge0: port 2(bridge_slave_1) entered disabled state [ 85.138330][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 85.154966][ T8433] 8021q: adding VLAN 0 to HW filter on device team0 [ 85.169461][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 85.178942][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.186547][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 85.204195][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 85.213538][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.221061][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 85.245457][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 85.254797][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 85.263931][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 85.277637][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 85.285993][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 85.299172][ T8433] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 85.319284][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 85.327628][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 85.344577][ T8433] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 85.367881][ T8652] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 85.391409][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 85.401097][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 85.410614][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 85.424201][ T8433] device veth0_vlan entered promiscuous mode [ 85.439251][ T8433] device veth1_vlan entered promiscuous mode [ 85.466849][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 85.475938][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 85.486333][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 85.501670][ T8433] device veth0_macvtap entered promiscuous mode [ 85.514657][ T8433] device veth1_macvtap entered promiscuous mode [ 85.536454][ T8433] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 85.544808][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 85.556641][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 85.569671][ T8433] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 85.580277][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 85.590257][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 85.601559][ T8433] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.610870][ T8433] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.620584][ T8433] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.630006][ T8433] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 85.728997][ T1307] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 85.745293][ T1307] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 85.778507][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 85.796898][ T29] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 85.807961][ T29] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 85.824324][ T3825] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/03 15:19:27 building call list... [ 86.503638][ T9] ------------[ cut here ]------------ [ 86.509610][ T9] hook not found, pf 3 num 0 [ 86.510876][ T9] WARNING: CPU: 1 PID: 9 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 86.530169][ T9] Modules linked in: [ 86.537558][ T9] CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 86.550325][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 86.562518][ T9] Workqueue: netns cleanup_net [ 86.570302][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 86.585599][ T9] 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 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 86.608809][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 86.624232][ T9] RAX: 0000000000000000 RBX: ffff8881474f6900 RCX: 0000000000000000 [ 86.632556][ T9] RDX: ffff888011d50000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 86.645779][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 86.655928][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888028a68f20 [ 86.665735][ T9] R13: 0000000000000000 R14: ffff8880144d9100 R15: 0000000000000001 [ 86.675302][ T9] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 86.685784][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 86.697637][ T9] CR2: 00007f41d41cb000 CR3: 0000000021c10000 CR4: 00000000001506f0 [ 86.708280][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 86.717766][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 86.727389][ T9] Call Trace: [ 86.730823][ T9] nf_unregister_net_hooks+0x117/0x160 [ 86.739215][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 86.747874][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 86.754703][ T9] cleanup_net+0x451/0xb10 [ 86.759177][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 86.766331][ T9] process_one_work+0x98d/0x1600 [ 86.771424][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 86.779677][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 86.786386][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 86.792093][ T9] worker_thread+0x64c/0x1120 [ 86.798809][ T9] ? process_one_work+0x1600/0x1600 [ 86.806803][ T9] kthread+0x3b1/0x4a0 [ 86.811379][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 86.818657][ T9] ret_from_fork+0x1f/0x30 [ 86.824208][ T9] Kernel panic - not syncing: panic_on_warn set ... [ 86.831186][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 86.839205][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 86.849676][ T9] Workqueue: netns cleanup_net [ 86.854720][ T9] Call Trace: [ 86.858113][ T9] dump_stack+0x141/0x1d7 [ 86.862610][ T9] panic+0x306/0x73d [ 86.866757][ T9] ? __warn_printk+0xf3/0xf3 [ 86.871851][ T9] ? __warn.cold+0x1a/0x44 [ 86.876300][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 86.882047][ T9] __warn.cold+0x35/0x44 [ 86.886640][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 86.892663][ T9] report_bug+0x1bd/0x210 [ 86.897036][ T9] handle_bug+0x3c/0x60 [ 86.901309][ T9] exc_invalid_op+0x14/0x40 [ 86.906077][ T9] asm_exc_invalid_op+0x12/0x20 [ 86.911053][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 86.918023][ T9] 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 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 86.944699][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 86.953557][ T9] RAX: 0000000000000000 RBX: ffff8881474f6900 RCX: 0000000000000000 [ 86.965275][ T9] RDX: ffff888011d50000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 86.974249][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 86.982865][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888028a68f20 [ 86.991230][ T9] R13: 0000000000000000 R14: ffff8880144d9100 R15: 0000000000000001 [ 86.999621][ T9] ? wake_up_klogd.part.0+0x8e/0xd0 [ 87.005453][ T9] ? vprintk+0x95/0x260 [ 87.009856][ T9] nf_unregister_net_hooks+0x117/0x160 [ 87.015556][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 87.021708][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 87.027414][ T9] cleanup_net+0x451/0xb10 [ 87.031863][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 87.037480][ T9] process_one_work+0x98d/0x1600 [ 87.042589][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 87.048416][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 87.053932][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 87.059187][ T9] worker_thread+0x64c/0x1120 [ 87.063918][ T9] ? process_one_work+0x1600/0x1600 [ 87.069709][ T9] kthread+0x3b1/0x4a0 [ 87.073948][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 87.079681][ T9] ret_from_fork+0x1f/0x30 [ 87.086082][ T9] Kernel Offset: disabled [ 87.091078][ T9] Rebooting in 86400 seconds..