[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 '10.128.0.116' (ECDSA) to the list of known hosts. 2021/05/08 00:42:51 fuzzer started 2021/05/08 00:42:51 connecting to host at 10.128.0.169:39389 2021/05/08 00:42:51 checking machine... 2021/05/08 00:42:51 checking revisions... 2021/05/08 00:42:51 testing simple program... syzkaller login: [ 70.978039][ T8420] chnl_net:caif_netlink_parms(): no params data found [ 71.029879][ T8420] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.039180][ T8420] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.049384][ T8420] device bridge_slave_0 entered promiscuous mode [ 71.059493][ T8420] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.067476][ T8420] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.076201][ T8420] device bridge_slave_1 entered promiscuous mode [ 71.097709][ T8420] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 71.108728][ T8420] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 71.132766][ T8420] team0: Port device team_slave_0 added [ 71.140100][ T8420] team0: Port device team_slave_1 added [ 71.157611][ T8420] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 71.165050][ 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. [ 71.191701][ T8420] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 71.204956][ T8420] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 71.212005][ 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. [ 71.238344][ T8420] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 71.264813][ T8420] device hsr_slave_0 entered promiscuous mode [ 71.271538][ T8420] device hsr_slave_1 entered promiscuous mode [ 71.372715][ T8420] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 71.384602][ T8420] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 71.395120][ T8420] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 71.404380][ T8420] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 71.429591][ T8420] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.436892][ T8420] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.445170][ T8420] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.452352][ T8420] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.498474][ T8420] 8021q: adding VLAN 0 to HW filter on device bond0 [ 71.511983][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 71.525412][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.534717][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.542500][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 71.556605][ T8420] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.567892][ T4828] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 71.578317][ T4828] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.585627][ T4828] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.603728][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 71.612067][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.619278][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.631229][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 71.640582][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 71.660682][ T8420] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 71.674782][ T8420] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 71.687121][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 71.696221][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 71.705889][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 71.714926][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 71.733263][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 71.740839][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 71.755824][ T8420] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 71.784940][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 71.805443][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 71.815723][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 71.823946][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 71.836043][ T8420] device veth0_vlan entered promiscuous mode [ 71.848030][ T8420] device veth1_vlan entered promiscuous mode [ 71.870438][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 71.879344][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 71.887894][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 71.900219][ T8420] device veth0_macvtap entered promiscuous mode [ 71.910500][ T8420] device veth1_macvtap entered promiscuous mode [ 71.929631][ T8420] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 71.937283][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 71.947653][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 71.960342][ T8420] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 71.968556][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 71.977175][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 71.990247][ T8420] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.001468][ T8420] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.011184][ T8420] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.020425][ T8420] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.124490][ T248] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 72.132602][ T248] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 72.158203][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 72.176022][ T1383] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 72.186160][ T1383] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 72.199498][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/08 00:42:54 building call list... [ 72.895759][ T1383] ------------[ cut here ]------------ [ 72.901607][ T1383] hook not found, pf 3 num 0 [ 72.902225][ T1383] WARNING: CPU: 1 PID: 1383 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 72.920746][ T1383] Modules linked in: [ 72.926402][ T1383] CPU: 1 PID: 1383 Comm: kworker/u4:6 Not tainted 5.12.0-syzkaller #0 [ 72.936498][ T1383] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.947407][ T1383] Workqueue: netns cleanup_net [ 72.952227][ T1383] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 72.960971][ T1383] 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 d8 6d 8a e8 50 5b 8a 01 <0f> 0b e9 e5 00 00 00 e8 69 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 72.982809][ T1383] RSP: 0018:ffffc900056dfbc0 EFLAGS: 00010286 [ 72.989413][ T1383] RAX: 0000000000000000 RBX: ffff88814a355600 RCX: 0000000000000000 [ 72.999107][ T1383] RDX: ffff8880174d1c40 RSI: ffffffff815c8ba5 RDI: fffff52000adbf6a [ 73.007571][ T1383] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 73.023344][ T1383] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880303d8f20 [ 73.031679][ T1383] R13: 0000000000000000 R14: ffff888023ad2600 R15: 0000000000000001 [ 73.044198][ T1383] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 73.053789][ T1383] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.060597][ T1383] CR2: 00007f9487700000 CR3: 00000000237cd000 CR4: 00000000001506f0 [ 73.070841][ T1383] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.079798][ T1383] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.088976][ T1383] Call Trace: [ 73.092287][ T1383] nf_unregister_net_hooks+0x117/0x160 [ 73.099143][ T1383] arpt_unregister_table_pre_exit+0x67/0x80 [ 73.105712][ T1383] ? arptable_filter_net_exit+0x20/0x20 [ 73.111293][ T1383] cleanup_net+0x451/0xb10 [ 73.122059][ T1383] ? ops_free_list.part.0+0x3d0/0x3d0 [ 73.129152][ T1383] process_one_work+0x98d/0x1600 [ 73.134777][ T1383] ? pwq_dec_nr_in_flight+0x320/0x320 [ 73.140182][ T1383] ? rwlock_bug.part.0+0x90/0x90 [ 73.146822][ T1383] ? _raw_spin_lock_irq+0x41/0x50 [ 73.151908][ T1383] worker_thread+0x64c/0x1120 [ 73.158177][ T1383] ? __kthread_parkme+0x13f/0x1e0 [ 73.164223][ T1383] ? process_one_work+0x1600/0x1600 [ 73.169463][ T1383] kthread+0x3b1/0x4a0 [ 73.174948][ T1383] ? __kthread_bind_mask+0xc0/0xc0 [ 73.180092][ T1383] ret_from_fork+0x1f/0x30 [ 73.186265][ T1383] Kernel panic - not syncing: panic_on_warn set ... [ 73.192876][ T1383] CPU: 0 PID: 1383 Comm: kworker/u4:6 Not tainted 5.12.0-syzkaller #0 [ 73.201058][ T1383] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.211117][ T1383] Workqueue: netns cleanup_net [ 73.215902][ T1383] Call Trace: [ 73.219188][ T1383] dump_stack+0x141/0x1d7 [ 73.223535][ T1383] panic+0x306/0x73d [ 73.227441][ T1383] ? __warn_printk+0xf3/0xf3 [ 73.232159][ T1383] ? __warn.cold+0x1a/0x44 [ 73.236607][ T1383] ? __nf_unregister_net_hook+0x1eb/0x610 [ 73.242371][ T1383] __warn.cold+0x35/0x44 [ 73.246629][ T1383] ? __nf_unregister_net_hook+0x1eb/0x610 [ 73.252374][ T1383] report_bug+0x1bd/0x210 [ 73.256724][ T1383] handle_bug+0x3c/0x60 [ 73.260894][ T1383] exc_invalid_op+0x14/0x40 [ 73.265410][ T1383] asm_exc_invalid_op+0x12/0x20 [ 73.270281][ T1383] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 73.276725][ T1383] 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 d8 6d 8a e8 50 5b 8a 01 <0f> 0b e9 e5 00 00 00 e8 69 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 73.296345][ T1383] RSP: 0018:ffffc900056dfbc0 EFLAGS: 00010286 [ 73.302594][ T1383] RAX: 0000000000000000 RBX: ffff88814a355600 RCX: 0000000000000000 [ 73.310748][ T1383] RDX: ffff8880174d1c40 RSI: ffffffff815c8ba5 RDI: fffff52000adbf6a [ 73.318733][ T1383] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 73.326713][ T1383] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880303d8f20 [ 73.334694][ T1383] R13: 0000000000000000 R14: ffff888023ad2600 R15: 0000000000000001 [ 73.342683][ T1383] ? wake_up_klogd.part.0+0x8e/0xd0 [ 73.347911][ T1383] ? vprintk+0x95/0x260 [ 73.352098][ T1383] nf_unregister_net_hooks+0x117/0x160 [ 73.357582][ T1383] arpt_unregister_table_pre_exit+0x67/0x80 [ 73.363542][ T1383] ? arptable_filter_net_exit+0x20/0x20 [ 73.369281][ T1383] cleanup_net+0x451/0xb10 [ 73.373717][ T1383] ? ops_free_list.part.0+0x3d0/0x3d0 [ 73.379121][ T1383] process_one_work+0x98d/0x1600 [ 73.384088][ T1383] ? pwq_dec_nr_in_flight+0x320/0x320 [ 73.389579][ T1383] ? rwlock_bug.part.0+0x90/0x90 [ 73.394555][ T1383] ? _raw_spin_lock_irq+0x41/0x50 [ 73.399606][ T1383] worker_thread+0x64c/0x1120 [ 73.404310][ T1383] ? __kthread_parkme+0x13f/0x1e0 [ 73.409349][ T1383] ? process_one_work+0x1600/0x1600 [ 73.414569][ T1383] kthread+0x3b1/0x4a0 [ 73.418652][ T1383] ? __kthread_bind_mask+0xc0/0xc0 [ 73.423778][ T1383] ret_from_fork+0x1f/0x30 [ 73.429388][ T1383] Kernel Offset: disabled [ 73.433934][ T1383] Rebooting in 86400 seconds..