[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.25' (ECDSA) to the list of known hosts. 2021/04/28 12:27:15 fuzzer started 2021/04/28 12:27:15 connecting to host at 10.128.0.169:38567 2021/04/28 12:27:15 checking machine... 2021/04/28 12:27:15 checking revisions... 2021/04/28 12:27:15 testing simple program... syzkaller login: [ 69.902634][ T8463] chnl_net:caif_netlink_parms(): no params data found [ 69.957393][ T8463] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.966457][ T8463] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.975417][ T8463] device bridge_slave_0 entered promiscuous mode [ 69.985600][ T8463] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.992761][ T8463] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.001264][ T8463] device bridge_slave_1 entered promiscuous mode [ 70.022769][ T8463] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 70.033890][ T8463] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.058811][ T8463] team0: Port device team_slave_0 added [ 70.067302][ T8463] team0: Port device team_slave_1 added [ 70.086374][ T8463] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 70.093334][ T8463] 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. [ 70.121691][ T8463] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 70.136729][ T8463] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 70.143843][ T8463] 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. [ 70.171922][ T8463] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 70.201203][ T8463] device hsr_slave_0 entered promiscuous mode [ 70.208129][ T8463] device hsr_slave_1 entered promiscuous mode [ 70.319015][ T8463] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 70.329847][ T8463] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 70.340425][ T8463] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 70.352298][ T8463] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 70.380329][ T8463] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.387557][ T8463] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.395956][ T8463] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.403065][ T8463] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.455360][ T8463] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.470701][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.482873][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.492511][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.500998][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 70.516847][ T8463] 8021q: adding VLAN 0 to HW filter on device team0 [ 70.530184][ T8682] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 70.539829][ T8682] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.547108][ T8682] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.560617][ T3740] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 70.569199][ T3740] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.576376][ T3740] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.601677][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 70.629329][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 70.639149][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 70.648288][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 70.658398][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 70.669851][ T8463] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 70.694469][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 70.702479][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 70.719299][ T8463] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 70.748814][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 70.777897][ T8682] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 70.789752][ T8682] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 70.799526][ T8682] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 70.813253][ T8463] device veth0_vlan entered promiscuous mode [ 70.838281][ T8463] device veth1_vlan entered promiscuous mode [ 70.878194][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 70.889160][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 70.899838][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 70.913078][ T8463] device veth0_macvtap entered promiscuous mode [ 70.931636][ T8463] device veth1_macvtap entered promiscuous mode [ 70.950621][ T8463] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 70.958362][ T8682] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 70.969388][ T8682] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 70.982899][ T8463] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 70.990955][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 71.000344][ T4863] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 71.015298][ T8463] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.025334][ T8463] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.034035][ T8463] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.043576][ T8463] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.153607][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 71.186279][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 71.197381][ T81] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 71.207145][ T81] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 71.218637][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 71.232432][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/28 12:27:18 building call list... [ 71.908227][ T123] ------------[ cut here ]------------ [ 71.913943][ T123] hook not found, pf 3 num 0 [ 71.916521][ T123] WARNING: CPU: 0 PID: 123 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 71.931397][ T123] Modules linked in: [ 71.937267][ T123] CPU: 0 PID: 123 Comm: kworker/u4:3 Not tainted 5.12.0-next-20210428-syzkaller #0 [ 71.947574][ T123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.963369][ T123] Workqueue: netns cleanup_net [ 71.969295][ T123] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 71.977354][ 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 c0 4d 6e 8a e8 c8 62 8a 01 <0f> 0b e9 e5 00 00 00 e8 79 04 2d fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 72.010645][ T123] RSP: 0018:ffffc9000109fbc0 EFLAGS: 00010286 [ 72.016940][ T123] RAX: 0000000000000000 RBX: ffff8880240bb900 RCX: 0000000000000000 [ 72.026770][ T123] RDX: ffff888012a51c80 RSI: ffffffff815cc9f5 RDI: fffff52000213f6a [ 72.045090][ T123] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 72.058795][ T123] R10: ffffffff815c685e R11: 0000000000000000 R12: ffff88802b688f20 [ 72.068174][ T123] R13: 0000000000000000 R14: ffff8880127d2a00 R15: 0000000000000001 [ 72.079300][ T123] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 72.089489][ T123] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.099743][ T123] CR2: 000000c000c00000 CR3: 000000002a59b000 CR4: 00000000001506e0 [ 72.108957][ T123] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.124728][ T123] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.132809][ T123] Call Trace: [ 72.138048][ T123] nf_unregister_net_hooks+0x117/0x160 [ 72.143564][ T123] arpt_unregister_table_pre_exit+0x67/0x80 [ 72.153238][ T123] ? arptable_filter_net_exit+0x20/0x20 [ 72.159920][ T123] cleanup_net+0x451/0xb10 [ 72.166969][ T123] ? ops_free_list.part.0+0x3d0/0x3d0 [ 72.172407][ T123] process_one_work+0x98d/0x1600 [ 72.179629][ T123] ? pwq_dec_nr_in_flight+0x320/0x320 [ 72.187669][ T123] ? rwlock_bug.part.0+0x90/0x90 [ 72.192652][ T123] ? _raw_spin_lock_irq+0x41/0x50 [ 72.200940][ T123] worker_thread+0x64c/0x1120 [ 72.208286][ T123] ? __kthread_parkme+0x13f/0x1e0 [ 72.213363][ T123] ? process_one_work+0x1600/0x1600 [ 72.220648][ T123] kthread+0x3b1/0x4a0 [ 72.227222][ T123] ? __kthread_bind_mask+0xc0/0xc0 [ 72.237797][ T123] ret_from_fork+0x1f/0x30 [ 72.242293][ T123] Kernel panic - not syncing: panic_on_warn set ... [ 72.248889][ T123] CPU: 1 PID: 123 Comm: kworker/u4:3 Not tainted 5.12.0-next-20210428-syzkaller #0 [ 72.258171][ T123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.268225][ T123] Workqueue: netns cleanup_net [ 72.272998][ T123] Call Trace: [ 72.276282][ T123] dump_stack+0x141/0x1d7 [ 72.280651][ T123] panic+0x306/0x73d [ 72.284551][ T123] ? __warn_printk+0xf3/0xf3 [ 72.289261][ T123] ? __warn.cold+0x1a/0x44 [ 72.293868][ T123] ? __nf_unregister_net_hook+0x1eb/0x610 [ 72.299608][ T123] __warn.cold+0x35/0x44 [ 72.303871][ T123] ? __nf_unregister_net_hook+0x1eb/0x610 [ 72.309586][ T123] report_bug+0x1bd/0x210 [ 72.313922][ T123] handle_bug+0x3c/0x60 [ 72.318078][ T123] exc_invalid_op+0x14/0x40 [ 72.322582][ T123] asm_exc_invalid_op+0x12/0x20 [ 72.327429][ T123] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 72.333768][ 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 c0 4d 6e 8a e8 c8 62 8a 01 <0f> 0b e9 e5 00 00 00 e8 79 04 2d fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 72.353456][ T123] RSP: 0018:ffffc9000109fbc0 EFLAGS: 00010286 [ 72.359525][ T123] RAX: 0000000000000000 RBX: ffff8880240bb900 RCX: 0000000000000000 [ 72.367488][ T123] RDX: ffff888012a51c80 RSI: ffffffff815cc9f5 RDI: fffff52000213f6a [ 72.375458][ T123] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 72.383435][ T123] R10: ffffffff815c685e R11: 0000000000000000 R12: ffff88802b688f20 [ 72.391419][ T123] R13: 0000000000000000 R14: ffff8880127d2a00 R15: 0000000000000001 [ 72.399390][ T123] ? wake_up_klogd.part.0+0x8e/0xd0 [ 72.404596][ T123] ? vprintk+0x95/0x260 [ 72.408778][ T123] nf_unregister_net_hooks+0x117/0x160 [ 72.414238][ T123] arpt_unregister_table_pre_exit+0x67/0x80 [ 72.420135][ T123] ? arptable_filter_net_exit+0x20/0x20 [ 72.425849][ T123] cleanup_net+0x451/0xb10 [ 72.430264][ T123] ? ops_free_list.part.0+0x3d0/0x3d0 [ 72.435644][ T123] process_one_work+0x98d/0x1600 [ 72.440677][ T123] ? pwq_dec_nr_in_flight+0x320/0x320 [ 72.446065][ T123] ? rwlock_bug.part.0+0x90/0x90 [ 72.450998][ T123] ? _raw_spin_lock_irq+0x41/0x50 [ 72.456049][ T123] worker_thread+0x64c/0x1120 [ 72.460733][ T123] ? __kthread_parkme+0x13f/0x1e0 [ 72.465766][ T123] ? process_one_work+0x1600/0x1600 [ 72.471022][ T123] kthread+0x3b1/0x4a0 [ 72.475085][ T123] ? __kthread_bind_mask+0xc0/0xc0 [ 72.480219][ T123] ret_from_fork+0x1f/0x30 [ 72.484972][ T123] Kernel Offset: disabled [ 72.489428][ T123] Rebooting in 86400 seconds..