[ 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 '10.128.0.187' (ECDSA) to the list of known hosts. 2021/05/06 18:23:59 fuzzer started 2021/05/06 18:23:59 connecting to host at 10.128.0.169:42795 2021/05/06 18:23:59 checking machine... 2021/05/06 18:23:59 checking revisions... 2021/05/06 18:23:59 testing simple program... syzkaller login: [ 74.541011][ T8438] chnl_net:caif_netlink_parms(): no params data found [ 74.598401][ T8438] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.607777][ T8438] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.617045][ T8438] device bridge_slave_0 entered promiscuous mode [ 74.627725][ T8438] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.636141][ T8438] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.644040][ T8438] device bridge_slave_1 entered promiscuous mode [ 74.665968][ T8438] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.678153][ T8438] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.713745][ T8438] team0: Port device team_slave_0 added [ 74.723688][ T8438] team0: Port device team_slave_1 added [ 74.742008][ T8438] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.749465][ T8438] 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. [ 74.776354][ T8438] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.789658][ T8438] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.797089][ T8438] 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. [ 74.824042][ T8438] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.853679][ T8438] device hsr_slave_0 entered promiscuous mode [ 74.861546][ T8438] device hsr_slave_1 entered promiscuous mode [ 74.975732][ T8438] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 74.992175][ T8438] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 75.002954][ T8438] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 75.013768][ T8438] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 75.041241][ T8438] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.049845][ T8438] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.057855][ T8438] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.065572][ T8438] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.112169][ T8438] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.127338][ T3157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 75.139891][ T3157] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.149798][ T3157] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.158961][ T3157] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 75.172269][ T8438] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.186808][ T3157] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.196476][ T3157] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.203740][ T3157] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.228250][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.237559][ T4841] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.244806][ T4841] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.267642][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.277395][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 75.286658][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 75.295742][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.307770][ T8438] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.320792][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 75.340464][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 75.348409][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 75.363380][ T8438] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 75.384284][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.406765][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.415902][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.424070][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.436307][ T8438] device veth0_vlan entered promiscuous mode [ 75.450990][ T8438] device veth1_vlan entered promiscuous mode [ 75.473351][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.482154][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 75.491478][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.507096][ T8438] device veth0_macvtap entered promiscuous mode [ 75.516289][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 75.528760][ T8438] device veth1_macvtap entered promiscuous mode [ 75.546768][ T8438] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.554362][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 75.566889][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.580642][ T8438] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.588662][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 75.598534][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 75.610377][ T8438] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.620892][ T8438] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.630640][ T8438] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.648497][ T8438] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.734027][ T121] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.762428][ T121] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 75.778678][ T693] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.787732][ T8650] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 75.797249][ T693] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.811599][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/06 18:24:02 building call list... [ 76.518751][ T693] ------------[ cut here ]------------ [ 76.524676][ T693] hook not found, pf 3 num 0 [ 76.525578][ T693] WARNING: CPU: 1 PID: 693 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 76.545543][ T693] Modules linked in: [ 76.549559][ T693] CPU: 1 PID: 693 Comm: kworker/u4:5 Not tainted 5.12.0-syzkaller #0 [ 76.562071][ T693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.574829][ T693] Workqueue: netns cleanup_net [ 76.584904][ T693] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.591394][ T693] 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 95 6e 8a e8 16 3f 8a 01 <0f> 0b e9 e5 00 00 00 e8 39 02 2b fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.618800][ T693] RSP: 0018:ffffc900033ffbc0 EFLAGS: 00010286 [ 76.625090][ T693] RAX: 0000000000000000 RBX: ffff88802812c800 RCX: 0000000000000000 [ 76.633242][ T693] RDX: ffff888016d1b880 RSI: ffffffff815cabb5 RDI: fffff5200067ff6a [ 76.642602][ T693] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.651617][ T693] R10: ffffffff815c4a1e R11: 0000000000000000 R12: ffff88802ccb8f20 [ 76.660976][ T693] R13: 0000000000000000 R14: ffff88801bd8c880 R15: 0000000000000001 [ 76.669944][ T693] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 76.690062][ T693] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.697643][ T693] CR2: 00007f5f68875000 CR3: 00000000145e2000 CR4: 00000000001506f0 [ 76.706408][ T693] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.716015][ T693] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.724288][ T693] Call Trace: [ 76.729933][ T693] nf_unregister_net_hooks+0x117/0x160 [ 76.736472][ T693] arpt_unregister_table_pre_exit+0x67/0x80 [ 76.742415][ T693] ? arptable_filter_net_exit+0x20/0x20 [ 76.750522][ T693] cleanup_net+0x451/0xb10 [ 76.758278][ T693] ? ops_free_list.part.0+0x3d0/0x3d0 [ 76.763827][ T693] process_one_work+0x98d/0x1600 [ 76.770206][ T693] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.776403][ T693] ? rwlock_bug.part.0+0x90/0x90 [ 76.781653][ T693] ? _raw_spin_lock_irq+0x41/0x50 [ 76.787770][ T693] worker_thread+0x64c/0x1120 [ 76.792686][ T693] ? __kthread_parkme+0x13f/0x1e0 [ 76.799152][ T693] ? process_one_work+0x1600/0x1600 [ 76.805389][ T693] kthread+0x3b1/0x4a0 [ 76.809685][ T693] ? __kthread_bind_mask+0xc0/0xc0 [ 76.816481][ T693] ret_from_fork+0x1f/0x30 [ 76.821313][ T693] Kernel panic - not syncing: panic_on_warn set ... [ 76.828119][ T693] CPU: 0 PID: 693 Comm: kworker/u4:5 Not tainted 5.12.0-syzkaller #0 [ 76.836637][ T693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.847085][ T693] Workqueue: netns cleanup_net [ 76.852069][ T693] Call Trace: [ 76.855467][ T693] dump_stack+0x141/0x1d7 [ 76.860319][ T693] panic+0x306/0x73d [ 76.864237][ T693] ? __warn_printk+0xf3/0xf3 [ 76.868969][ T693] ? __warn.cold+0x1a/0x44 [ 76.873752][ T693] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.879667][ T693] __warn.cold+0x35/0x44 [ 76.884024][ T693] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.889886][ T693] report_bug+0x1bd/0x210 [ 76.894433][ T693] handle_bug+0x3c/0x60 [ 76.898797][ T693] exc_invalid_op+0x14/0x40 [ 76.903444][ T693] asm_exc_invalid_op+0x12/0x20 [ 76.908934][ T693] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.915741][ T693] 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 95 6e 8a e8 16 3f 8a 01 <0f> 0b e9 e5 00 00 00 e8 39 02 2b fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.935817][ T693] RSP: 0018:ffffc900033ffbc0 EFLAGS: 00010286 [ 76.942430][ T693] RAX: 0000000000000000 RBX: ffff88802812c800 RCX: 0000000000000000 [ 76.950521][ T693] RDX: ffff888016d1b880 RSI: ffffffff815cabb5 RDI: fffff5200067ff6a [ 76.958772][ T693] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.967187][ T693] R10: ffffffff815c4a1e R11: 0000000000000000 R12: ffff88802ccb8f20 [ 76.975173][ T693] R13: 0000000000000000 R14: ffff88801bd8c880 R15: 0000000000000001 [ 76.983687][ T693] ? wake_up_klogd.part.0+0x8e/0xd0 [ 76.989174][ T693] ? vprintk+0x95/0x260 [ 76.993377][ T693] nf_unregister_net_hooks+0x117/0x160 [ 76.998858][ T693] arpt_unregister_table_pre_exit+0x67/0x80 [ 77.004976][ T693] ? arptable_filter_net_exit+0x20/0x20 [ 77.010748][ T693] cleanup_net+0x451/0xb10 [ 77.015493][ T693] ? ops_free_list.part.0+0x3d0/0x3d0 [ 77.021012][ T693] process_one_work+0x98d/0x1600 [ 77.026380][ T693] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.031793][ T693] ? rwlock_bug.part.0+0x90/0x90 [ 77.036772][ T693] ? _raw_spin_lock_irq+0x41/0x50 [ 77.041846][ T693] worker_thread+0x64c/0x1120 [ 77.046650][ T693] ? __kthread_parkme+0x13f/0x1e0 [ 77.051720][ T693] ? process_one_work+0x1600/0x1600 [ 77.057043][ T693] kthread+0x3b1/0x4a0 [ 77.061147][ T693] ? __kthread_bind_mask+0xc0/0xc0 [ 77.066291][ T693] ret_from_fork+0x1f/0x30 [ 77.072691][ T693] Kernel Offset: disabled [ 77.077518][ T693] Rebooting in 86400 seconds..