[ 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 '10.128.0.143' (ECDSA) to the list of known hosts. 2021/05/07 19:27:23 fuzzer started 2021/05/07 19:27:23 connecting to host at 10.128.0.169:41619 2021/05/07 19:27:23 checking machine... 2021/05/07 19:27:23 checking revisions... 2021/05/07 19:27:23 testing simple program... syzkaller login: [ 58.872611][ T8435] chnl_net:caif_netlink_parms(): no params data found [ 58.913651][ T8435] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.923148][ T8435] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.931442][ T8435] device bridge_slave_0 entered promiscuous mode [ 58.939929][ T8435] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.947882][ T8435] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.955365][ T8435] device bridge_slave_1 entered promiscuous mode [ 58.972719][ T8435] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.983433][ T8435] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.003379][ T8435] team0: Port device team_slave_0 added [ 59.011639][ T8435] team0: Port device team_slave_1 added [ 59.027354][ T8435] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 59.034684][ T8435] 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. [ 59.062211][ T8435] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 59.074644][ T8435] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 59.082547][ T8435] 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. [ 59.109139][ T8435] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 59.133662][ T8435] device hsr_slave_0 entered promiscuous mode [ 59.141195][ T8435] device hsr_slave_1 entered promiscuous mode [ 59.222908][ T8435] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 59.234810][ T8435] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 59.244073][ T8435] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 59.253705][ T8435] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 59.273315][ T8435] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.280657][ T8435] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.288284][ T8435] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.295324][ T8435] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.333838][ T8435] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.347137][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.357871][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.365717][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.374398][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 59.387061][ T8435] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.398204][ T3153] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.406694][ T3153] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.413948][ T3153] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.424979][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.433806][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.440880][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.459023][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.468053][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 59.483387][ T8435] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 59.495047][ T8435] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 59.508576][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 59.516980][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 59.525254][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 59.544749][ T8435] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 59.554789][ T8656] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 59.562523][ T8656] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 59.570219][ T8656] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 59.587690][ T3153] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 59.605190][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 59.613588][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 59.621555][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 59.632167][ T8435] device veth0_vlan entered promiscuous mode [ 59.643029][ T8435] device veth1_vlan entered promiscuous mode [ 59.661760][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 59.669976][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 59.678944][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 59.690423][ T8435] device veth0_macvtap entered promiscuous mode [ 59.699979][ T8435] device veth1_macvtap entered promiscuous mode [ 59.715372][ T8435] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 59.723707][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 59.733172][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 59.743894][ T8435] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 59.752310][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 59.763558][ T8435] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.774199][ T8435] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.783445][ T8435] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.792241][ T8435] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.855138][ T26] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 59.866688][ T26] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 59.878523][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 59.915521][ T26] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 59.923739][ T26] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 59.932803][ T24] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/07 19:27:26 building call list... executing program [ 60.466195][ T26] ------------[ cut here ]------------ [ 60.472227][ T26] hook not found, pf 3 num 0 [ 60.472735][ T26] WARNING: CPU: 1 PID: 26 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 60.488976][ T26] Modules linked in: [ 60.492939][ T26] CPU: 1 PID: 26 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 60.507123][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.535884][ T26] Workqueue: netns cleanup_net [ 60.541069][ T26] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 60.548492][ T26] 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 a1 6e 8a e8 d8 67 8a 01 <0f> 0b e9 e5 00 00 00 e8 b9 8a 2a fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 60.568867][ T26] RSP: 0018:ffffc90000e0fbc0 EFLAGS: 00010286 [ 60.575132][ T26] RAX: 0000000000000000 RBX: ffff888027e49500 RCX: 0000000000000000 [ 60.584065][ T26] RDX: ffff88801246d4c0 RSI: ffffffff815cc9a5 RDI: fffff520001c1f6a [ 60.592818][ T26] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 60.603004][ T26] R10: ffffffff815c680e R11: 0000000000000000 R12: ffff888037230f20 [ 60.611707][ T26] R13: 0000000000000000 R14: ffff888017781f80 R15: 0000000000000001 [ 60.620464][ T26] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 60.630164][ T26] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.637801][ T26] CR2: 00007fbbd94cb010 CR3: 0000000013599000 CR4: 0000000000350ee0 [ 60.646472][ T26] Call Trace: [ 60.649807][ T26] nf_unregister_net_hooks+0x117/0x160 [ 60.655347][ T26] arpt_unregister_table_pre_exit+0x67/0x80 [ 60.662755][ T26] ? arptable_filter_net_exit+0x20/0x20 [ 60.669092][ T26] cleanup_net+0x451/0xb10 [ 60.673601][ T26] ? ops_free_list.part.0+0x3d0/0x3d0 [ 60.680756][ T26] process_one_work+0x98d/0x1600 [ 60.686472][ T26] ? pwq_dec_nr_in_flight+0x320/0x320 [ 60.691913][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 60.698296][ T26] ? _raw_spin_lock_irq+0x41/0x50 [ 60.703476][ T26] worker_thread+0x64c/0x1120 [ 60.709211][ T26] ? process_one_work+0x1600/0x1600 [ 60.714667][ T26] kthread+0x3b1/0x4a0 [ 60.720208][ T26] ? __kthread_bind_mask+0xc0/0xc0 [ 60.725395][ T26] ret_from_fork+0x1f/0x30 [ 60.730888][ T26] Kernel panic - not syncing: panic_on_warn set ... [ 60.737473][ T26] CPU: 1 PID: 26 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 60.745447][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.755520][ T26] Workqueue: netns cleanup_net [ 60.760289][ T26] Call Trace: [ 60.763561][ T26] dump_stack+0x141/0x1d7 [ 60.767894][ T26] panic+0x306/0x73d [ 60.771789][ T26] ? __warn_printk+0xf3/0xf3 [ 60.776385][ T26] ? __warn.cold+0x1a/0x44 [ 60.780802][ T26] ? __nf_unregister_net_hook+0x1eb/0x610 [ 60.786528][ T26] __warn.cold+0x35/0x44 [ 60.790774][ T26] ? __nf_unregister_net_hook+0x1eb/0x610 [ 60.796498][ T26] report_bug+0x1bd/0x210 [ 60.800832][ T26] handle_bug+0x3c/0x60 [ 60.804983][ T26] exc_invalid_op+0x14/0x40 [ 60.809507][ T26] asm_exc_invalid_op+0x12/0x20 [ 60.814350][ T26] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 60.820671][ T26] 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 a1 6e 8a e8 d8 67 8a 01 <0f> 0b e9 e5 00 00 00 e8 b9 8a 2a fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 60.840353][ T26] RSP: 0018:ffffc90000e0fbc0 EFLAGS: 00010286 [ 60.846410][ T26] RAX: 0000000000000000 RBX: ffff888027e49500 RCX: 0000000000000000 [ 60.854455][ T26] RDX: ffff88801246d4c0 RSI: ffffffff815cc9a5 RDI: fffff520001c1f6a [ 60.862413][ T26] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 60.870721][ T26] R10: ffffffff815c680e R11: 0000000000000000 R12: ffff888037230f20 [ 60.878768][ T26] R13: 0000000000000000 R14: ffff888017781f80 R15: 0000000000000001 [ 60.886735][ T26] ? wake_up_klogd.part.0+0x8e/0xd0 [ 60.891932][ T26] ? vprintk+0x95/0x260 [ 60.896112][ T26] nf_unregister_net_hooks+0x117/0x160 [ 60.901567][ T26] arpt_unregister_table_pre_exit+0x67/0x80 [ 60.907470][ T26] ? arptable_filter_net_exit+0x20/0x20 [ 60.913011][ T26] cleanup_net+0x451/0xb10 [ 60.917421][ T26] ? ops_free_list.part.0+0x3d0/0x3d0 [ 60.922900][ T26] process_one_work+0x98d/0x1600 [ 60.927838][ T26] ? pwq_dec_nr_in_flight+0x320/0x320 [ 60.933206][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 60.938132][ T26] ? _raw_spin_lock_irq+0x41/0x50 [ 60.943154][ T26] worker_thread+0x64c/0x1120 [ 60.947986][ T26] ? process_one_work+0x1600/0x1600 [ 60.953197][ T26] kthread+0x3b1/0x4a0 [ 60.957256][ T26] ? __kthread_bind_mask+0xc0/0xc0 [ 60.962379][ T26] ret_from_fork+0x1f/0x30 [ 60.970699][ T26] Kernel Offset: disabled [ 60.975404][ T26] Rebooting in 86400 seconds..