[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.122' (ECDSA) to the list of known hosts. 2021/04/28 21:02:22 fuzzer started 2021/04/28 21:02:22 connecting to host at 10.128.0.169:45973 2021/04/28 21:02:22 checking machine... 2021/04/28 21:02:22 checking revisions... 2021/04/28 21:02:22 testing simple program... syzkaller login: [ 73.776413][ T8421] chnl_net:caif_netlink_parms(): no params data found [ 73.838039][ T8421] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.849354][ T8421] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.859040][ T8421] device bridge_slave_0 entered promiscuous mode [ 73.870251][ T8421] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.878121][ T8421] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.886056][ T8421] device bridge_slave_1 entered promiscuous mode [ 73.910187][ T8421] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.921793][ T8421] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.947284][ T8421] team0: Port device team_slave_0 added [ 73.955575][ T8421] team0: Port device team_slave_1 added [ 73.973797][ T8421] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.980928][ T8421] 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. [ 74.007982][ T8421] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.021672][ T8421] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.030219][ T8421] 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. [ 74.058271][ T8421] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.086646][ T8421] device hsr_slave_0 entered promiscuous mode [ 74.094913][ T8421] device hsr_slave_1 entered promiscuous mode [ 74.209414][ T8421] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 74.223075][ T8421] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 74.232617][ T8421] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 74.243917][ T8421] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 74.273518][ T8421] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.280818][ T8421] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.289336][ T8421] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.296714][ T8421] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.350701][ T8421] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.364335][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.378336][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.389430][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.398210][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.415100][ T8421] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.429281][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.438348][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.445419][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.460537][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.470780][ T20] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.477997][ T20] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.503305][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.526147][ T8421] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 74.539562][ T8421] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 74.554261][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.563002][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.572448][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.582095][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.591180][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.611025][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.618784][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.635969][ T8421] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.658380][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.681745][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.692327][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.701064][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.714797][ T8421] device veth0_vlan entered promiscuous mode [ 74.728702][ T8421] device veth1_vlan entered promiscuous mode [ 74.747873][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 74.756763][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 74.779289][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 74.788525][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.802848][ T8421] device veth0_macvtap entered promiscuous mode [ 74.814555][ T8421] device veth1_macvtap entered promiscuous mode [ 74.835223][ T8421] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.843982][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 74.853778][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 74.865533][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 74.874875][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 74.889945][ T8421] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 74.897741][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 74.906621][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 74.923629][ T8421] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.933327][ T8421] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.942545][ T8421] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.952243][ T8421] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 75.059824][ T123] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.075047][ T123] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.116256][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 75.132106][ T123] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.141269][ T123] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.153212][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/28 21:02:25 building call list... [ 75.830799][ T123] ------------[ cut here ]------------ [ 75.836595][ T123] hook not found, pf 3 num 0 [ 75.839564][ T123] WARNING: CPU: 1 PID: 123 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 75.855838][ T123] Modules linked in: [ 75.862989][ T123] CPU: 1 PID: 123 Comm: kworker/u4:3 Not tainted 5.12.0-rc7-syzkaller #0 [ 75.871712][ T123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.883409][ T123] Workqueue: netns cleanup_net [ 75.888553][ T123] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 75.894933][ T123] 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 00 6c 6c 8a e8 8e 38 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 36 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 75.919590][ T123] RSP: 0018:ffffc9000131fbc0 EFLAGS: 00010286 [ 75.926261][ T123] RAX: 0000000000000000 RBX: ffff888148000700 RCX: 0000000000000000 [ 75.934678][ T123] RDX: ffff888011c39c40 RSI: ffffffff815c5205 RDI: fffff52000263f6a [ 75.944852][ T123] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.953745][ T123] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff888024740f20 [ 75.963823][ T123] R13: 0000000000000000 R14: ffff88801238ff00 R15: 0000000000000001 [ 75.972589][ T123] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 75.985884][ T123] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.993125][ T123] CR2: 00007f8d6447b580 CR3: 00000000182a2000 CR4: 00000000001506e0 [ 76.003157][ T123] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.012652][ T123] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.021297][ T123] Call Trace: [ 76.024621][ T123] nf_unregister_net_hooks+0x117/0x160 [ 76.030714][ T123] arpt_unregister_table_pre_exit+0x67/0x80 [ 76.036664][ T123] ? arptable_filter_net_exit+0x20/0x20 [ 76.043029][ T123] cleanup_net+0x451/0xb10 [ 76.048050][ T123] ? ops_free_list.part.0+0x3d0/0x3d0 [ 76.053486][ T123] process_one_work+0x98d/0x1600 [ 76.060774][ T123] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.066215][ T123] ? rwlock_bug.part.0+0x90/0x90 [ 76.072998][ T123] ? _raw_spin_lock_irq+0x41/0x50 [ 76.079038][ T123] worker_thread+0x64c/0x1120 [ 76.083830][ T123] ? process_one_work+0x1600/0x1600 [ 76.089765][ T123] kthread+0x3b1/0x4a0 [ 76.093983][ T123] ? __kthread_bind_mask+0xc0/0xc0 [ 76.099699][ T123] ret_from_fork+0x1f/0x30 [ 76.104318][ T123] Kernel panic - not syncing: panic_on_warn set ... [ 76.110924][ T123] CPU: 1 PID: 123 Comm: kworker/u4:3 Not tainted 5.12.0-rc7-syzkaller #0 [ 76.119630][ T123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.130049][ T123] Workqueue: netns cleanup_net [ 76.135431][ T123] Call Trace: [ 76.138709][ T123] dump_stack+0x141/0x1d7 [ 76.143082][ T123] panic+0x306/0x73d [ 76.146975][ T123] ? __warn_printk+0xf3/0xf3 [ 76.151588][ T123] ? __warn.cold+0x1a/0x44 [ 76.156373][ T123] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.162125][ T123] __warn.cold+0x35/0x44 [ 76.166370][ T123] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.172735][ T123] report_bug+0x1bd/0x210 [ 76.177439][ T123] handle_bug+0x3c/0x60 [ 76.182121][ T123] exc_invalid_op+0x14/0x40 [ 76.186832][ T123] asm_exc_invalid_op+0x12/0x20 [ 76.191948][ T123] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.198395][ T123] 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 00 6c 6c 8a e8 8e 38 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 36 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.218709][ T123] RSP: 0018:ffffc9000131fbc0 EFLAGS: 00010286 [ 76.224913][ T123] RAX: 0000000000000000 RBX: ffff888148000700 RCX: 0000000000000000 [ 76.233382][ T123] RDX: ffff888011c39c40 RSI: ffffffff815c5205 RDI: fffff52000263f6a [ 76.241612][ T123] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.249676][ T123] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff888024740f20 [ 76.258035][ T123] R13: 0000000000000000 R14: ffff88801238ff00 R15: 0000000000000001 [ 76.266215][ T123] ? wake_up_klogd.part.0+0x8e/0xd0 [ 76.271586][ T123] ? vprintk_func+0x95/0x1e0 [ 76.276802][ T123] nf_unregister_net_hooks+0x117/0x160 [ 76.282898][ T123] arpt_unregister_table_pre_exit+0x67/0x80 [ 76.289489][ T123] ? arptable_filter_net_exit+0x20/0x20 [ 76.295313][ T123] cleanup_net+0x451/0xb10 [ 76.300291][ T123] ? ops_free_list.part.0+0x3d0/0x3d0 [ 76.305780][ T123] process_one_work+0x98d/0x1600 [ 76.311358][ T123] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.317171][ T123] ? rwlock_bug.part.0+0x90/0x90 [ 76.322214][ T123] ? _raw_spin_lock_irq+0x41/0x50 [ 76.327446][ T123] worker_thread+0x64c/0x1120 [ 76.332483][ T123] ? process_one_work+0x1600/0x1600 [ 76.337685][ T123] kthread+0x3b1/0x4a0 [ 76.341940][ T123] ? __kthread_bind_mask+0xc0/0xc0 [ 76.347978][ T123] ret_from_fork+0x1f/0x30 [ 76.354428][ T123] Kernel Offset: disabled [ 76.360375][ T123] Rebooting in 86400 seconds..