[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.0.234' (ECDSA) to the list of known hosts. 2021/05/04 06:39:54 fuzzer started 2021/05/04 06:39:54 connecting to host at 10.128.0.169:41143 2021/05/04 06:39:54 checking machine... 2021/05/04 06:39:54 checking revisions... 2021/05/04 06:39:54 testing simple program... syzkaller login: [ 74.812503][ T8420] chnl_net:caif_netlink_parms(): no params data found [ 74.862618][ T8420] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.870663][ T8420] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.879769][ T8420] device bridge_slave_0 entered promiscuous mode [ 74.890171][ T8420] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.898556][ T8420] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.907111][ T8420] device bridge_slave_1 entered promiscuous mode [ 74.927647][ T8420] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.939852][ T8420] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.963765][ T8420] team0: Port device team_slave_0 added [ 74.971897][ T8420] team0: Port device team_slave_1 added [ 74.990128][ T8420] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.997370][ T8420] 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. [ 75.023450][ T8420] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 75.037072][ T8420] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 75.044699][ T8420] 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. [ 75.073330][ T8420] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 75.102225][ T8420] device hsr_slave_0 entered promiscuous mode [ 75.109487][ T8420] device hsr_slave_1 entered promiscuous mode [ 75.220200][ T8420] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 75.232434][ T8420] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 75.243314][ T8420] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 75.255950][ T8420] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 75.282894][ T8420] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.290327][ T8420] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.299136][ T8420] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.306321][ T8420] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.353607][ T8420] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.369669][ T3745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 75.381902][ T3745] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.391657][ T3745] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.401243][ T3745] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 75.415692][ T8420] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.428144][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.437706][ T2941] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.444951][ T2941] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.456969][ T3745] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.467113][ T3745] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.474217][ T3745] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.497785][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.515350][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 75.523291][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 75.533733][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 75.543465][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.558287][ T8420] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.580158][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 75.589198][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 75.602925][ T8420] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 75.622980][ T3745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.646244][ T3745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.656051][ T3745] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.664170][ T3745] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.673214][ T8420] device veth0_vlan entered promiscuous mode [ 75.688818][ T8420] device veth1_vlan entered promiscuous mode [ 75.713301][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.722439][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 75.731759][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.744801][ T8420] device veth0_macvtap entered promiscuous mode [ 75.756982][ T8420] device veth1_macvtap entered promiscuous mode [ 75.776832][ T8420] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.784410][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.797795][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 75.810515][ T8420] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.819793][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 75.829701][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 75.843475][ T8420] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.855933][ T8420] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.865636][ T8420] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.876911][ T8420] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.981999][ T158] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.999438][ T158] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 76.012129][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 76.044716][ T232] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 76.052888][ T232] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 76.063945][ T8640] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/04 06:39:57 building call list... [ 76.754896][ T158] ------------[ cut here ]------------ [ 76.761040][ T158] hook not found, pf 3 num 0 [ 76.761395][ T158] WARNING: CPU: 0 PID: 158 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 76.805036][ T158] Modules linked in: [ 76.809135][ T158] CPU: 1 PID: 158 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0 [ 76.830755][ T158] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.844277][ T158] Workqueue: netns cleanup_net [ 76.850188][ T158] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.876779][ T158] 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 60 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 79 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.914548][ T158] RSP: 0018:ffffc9000151fbc0 EFLAGS: 00010286 [ 76.920808][ T158] RAX: 0000000000000000 RBX: ffff8881476eb300 RCX: 0000000000000000 [ 76.930894][ T158] RDX: ffff88801267d4c0 RSI: ffffffff815c8ba5 RDI: fffff520002a3f6a [ 76.940368][ T158] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.949555][ T158] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888018da8f20 [ 76.960401][ T158] R13: 0000000000000000 R14: ffff888014642d00 R15: 0000000000000001 [ 76.969787][ T158] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 76.980071][ T158] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.988633][ T158] CR2: 00007fad2237d000 CR3: 0000000023adc000 CR4: 00000000001506e0 [ 76.998164][ T158] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.007352][ T158] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.016533][ T158] Call Trace: [ 77.019900][ T158] nf_unregister_net_hooks+0x117/0x160 [ 77.027389][ T158] arpt_unregister_table_pre_exit+0x67/0x80 [ 77.033416][ T158] ? arptable_filter_net_exit+0x20/0x20 [ 77.043541][ T158] cleanup_net+0x451/0xb10 [ 77.049172][ T158] ? ops_free_list.part.0+0x3d0/0x3d0 [ 77.055747][ T158] process_one_work+0x98d/0x1600 [ 77.060918][ T158] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.068039][ T158] ? rwlock_bug.part.0+0x90/0x90 [ 77.073233][ T158] ? _raw_spin_lock_irq+0x41/0x50 [ 77.080413][ T158] worker_thread+0x64c/0x1120 [ 77.086612][ T158] ? process_one_work+0x1600/0x1600 [ 77.092386][ T158] kthread+0x3b1/0x4a0 [ 77.098167][ T158] ? __kthread_bind_mask+0xc0/0xc0 [ 77.103608][ T158] ret_from_fork+0x1f/0x30 [ 77.110458][ T158] Kernel panic - not syncing: panic_on_warn set ... [ 77.117262][ T158] CPU: 1 PID: 158 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0 [ 77.125572][ T158] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.136627][ T158] Workqueue: netns cleanup_net [ 77.141616][ T158] Call Trace: [ 77.144900][ T158] dump_stack+0x141/0x1d7 [ 77.149348][ T158] panic+0x306/0x73d [ 77.153295][ T158] ? __warn_printk+0xf3/0xf3 [ 77.158016][ T158] ? __warn.cold+0x1a/0x44 [ 77.162462][ T158] ? __nf_unregister_net_hook+0x1eb/0x610 [ 77.168196][ T158] __warn.cold+0x35/0x44 [ 77.172456][ T158] ? __nf_unregister_net_hook+0x1eb/0x610 [ 77.178186][ T158] report_bug+0x1bd/0x210 [ 77.182516][ T158] handle_bug+0x3c/0x60 [ 77.186670][ T158] exc_invalid_op+0x14/0x40 [ 77.191434][ T158] asm_exc_invalid_op+0x12/0x20 [ 77.196392][ T158] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 77.203194][ T158] 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 60 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 79 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 77.223174][ T158] RSP: 0018:ffffc9000151fbc0 EFLAGS: 00010286 [ 77.229521][ T158] RAX: 0000000000000000 RBX: ffff8881476eb300 RCX: 0000000000000000 [ 77.238050][ T158] RDX: ffff88801267d4c0 RSI: ffffffff815c8ba5 RDI: fffff520002a3f6a [ 77.246290][ T158] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 77.254519][ T158] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888018da8f20 [ 77.263981][ T158] R13: 0000000000000000 R14: ffff888014642d00 R15: 0000000000000001 [ 77.272406][ T158] ? wake_up_klogd.part.0+0x8e/0xd0 [ 77.278242][ T158] ? vprintk+0x95/0x260 [ 77.282414][ T158] nf_unregister_net_hooks+0x117/0x160 [ 77.288456][ T158] arpt_unregister_table_pre_exit+0x67/0x80 [ 77.296039][ T158] ? arptable_filter_net_exit+0x20/0x20 [ 77.302361][ T158] cleanup_net+0x451/0xb10 [ 77.307416][ T158] ? ops_free_list.part.0+0x3d0/0x3d0 [ 77.312896][ T158] process_one_work+0x98d/0x1600 [ 77.318130][ T158] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.323615][ T158] ? rwlock_bug.part.0+0x90/0x90 [ 77.329637][ T158] ? _raw_spin_lock_irq+0x41/0x50 [ 77.334805][ T158] worker_thread+0x64c/0x1120 [ 77.339625][ T158] ? process_one_work+0x1600/0x1600 [ 77.345393][ T158] kthread+0x3b1/0x4a0 [ 77.350591][ T158] ? __kthread_bind_mask+0xc0/0xc0 [ 77.355845][ T158] ret_from_fork+0x1f/0x30 [ 77.362038][ T158] Kernel Offset: disabled [ 77.366584][ T158] Rebooting in 86400 seconds..