[ 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... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.126' (ECDSA) to the list of known hosts. 2021/05/01 00:10:51 fuzzer started 2021/05/01 00:10:51 connecting to host at 10.128.0.169:37315 2021/05/01 00:10:51 checking machine... 2021/05/01 00:10:51 checking revisions... 2021/05/01 00:10:51 testing simple program... syzkaller login: [ 85.331005][ T8420] chnl_net:caif_netlink_parms(): no params data found [ 85.385064][ T8420] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.395463][ T8420] bridge0: port 1(bridge_slave_0) entered disabled state [ 85.405345][ T8420] device bridge_slave_0 entered promiscuous mode [ 85.420503][ T8420] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.428010][ T8420] bridge0: port 2(bridge_slave_1) entered disabled state [ 85.439283][ T8420] device bridge_slave_1 entered promiscuous mode [ 85.462464][ T8420] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 85.475404][ T8420] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 85.502324][ T8420] team0: Port device team_slave_0 added [ 85.511658][ T8420] team0: Port device team_slave_1 added [ 85.531364][ T8420] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 85.540168][ 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. [ 85.570164][ T8420] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 85.584140][ T8420] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 85.593219][ 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. [ 85.623381][ T8420] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 85.651427][ T8420] device hsr_slave_0 entered promiscuous mode [ 85.662827][ T8420] device hsr_slave_1 entered promiscuous mode [ 85.770944][ T8420] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 85.782824][ T8420] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 85.794199][ T8420] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 85.805542][ T8420] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 85.834779][ T8420] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.842900][ T8420] bridge0: port 2(bridge_slave_1) entered forwarding state [ 85.851522][ T8420] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.860334][ T8420] bridge0: port 1(bridge_slave_0) entered forwarding state [ 85.910158][ T8420] 8021q: adding VLAN 0 to HW filter on device bond0 [ 85.926635][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 85.940821][ T27] bridge0: port 1(bridge_slave_0) entered disabled state [ 85.952457][ T27] bridge0: port 2(bridge_slave_1) entered disabled state [ 85.962282][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 85.977126][ T8420] 8021q: adding VLAN 0 to HW filter on device team0 [ 85.991944][ T3156] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 86.001426][ T3156] bridge0: port 1(bridge_slave_0) entered blocking state [ 86.011108][ T3156] bridge0: port 1(bridge_slave_0) entered forwarding state [ 86.024104][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 86.033895][ T8641] bridge0: port 2(bridge_slave_1) entered blocking state [ 86.041741][ T8641] bridge0: port 2(bridge_slave_1) entered forwarding state [ 86.064337][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 86.074680][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 86.088646][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 86.103391][ T3156] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 86.118815][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 86.132157][ T8420] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 86.153666][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 86.162697][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 86.177892][ T8420] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 86.208430][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 86.224679][ T3156] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 86.237021][ T3156] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 86.246803][ T3156] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 86.261294][ T8420] device veth0_vlan entered promiscuous mode [ 86.275223][ T8420] device veth1_vlan entered promiscuous mode [ 86.301477][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 86.312289][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 86.323357][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 86.338412][ T8420] device veth0_macvtap entered promiscuous mode [ 86.354524][ T8420] device veth1_macvtap entered promiscuous mode [ 86.375192][ T8420] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 86.385227][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 86.395769][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 86.410282][ T8420] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 86.418831][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 86.429216][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 86.443462][ T8420] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.453660][ T8420] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.466990][ T8420] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.480697][ T8420] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 86.585428][ T87] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 86.628197][ T87] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 86.638351][ T743] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 86.643790][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 86.649745][ T743] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 86.675754][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/01 00:10:55 building call list... [ 87.315349][ T87] ------------[ cut here ]------------ [ 87.326595][ T87] hook not found, pf 3 num 0 [ 87.327236][ T87] WARNING: CPU: 1 PID: 87 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 87.349181][ T87] Modules linked in: [ 87.353317][ T87] CPU: 1 PID: 87 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 87.363846][ T87] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.375612][ T87] Workqueue: netns cleanup_net [ 87.381498][ T87] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 87.393351][ T87] 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 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 87.416389][ T87] RSP: 0018:ffffc9000113fbc0 EFLAGS: 00010286 [ 87.424677][ T87] RAX: 0000000000000000 RBX: ffff888021c12100 RCX: 0000000000000000 [ 87.434155][ T87] RDX: ffff8880122ad4c0 RSI: ffffffff815c8ba5 RDI: fffff52000227f6a [ 87.443305][ T87] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 87.453739][ T87] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888019b38f20 [ 87.463464][ T87] R13: 0000000000000000 R14: ffff88801ceed800 R15: 0000000000000001 [ 87.476980][ T87] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 87.487686][ T87] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.495321][ T87] CR2: 0000562dd0830188 CR3: 000000001dec8000 CR4: 00000000001506e0 [ 87.505458][ T87] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.515559][ T87] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.524742][ T87] Call Trace: [ 87.530872][ T87] nf_unregister_net_hooks+0x117/0x160 [ 87.536858][ T87] arpt_unregister_table_pre_exit+0x67/0x80 [ 87.545687][ T87] ? arptable_filter_net_exit+0x20/0x20 [ 87.555310][ T87] cleanup_net+0x451/0xb10 [ 87.561719][ T87] ? ops_free_list.part.0+0x3d0/0x3d0 [ 87.569256][ T87] process_one_work+0x98d/0x1600 [ 87.574401][ T87] ? pwq_dec_nr_in_flight+0x320/0x320 [ 87.582325][ T87] ? rwlock_bug.part.0+0x90/0x90 [ 87.589364][ T87] ? _raw_spin_lock_irq+0x41/0x50 [ 87.595419][ T87] worker_thread+0x64c/0x1120 [ 87.602351][ T87] ? process_one_work+0x1600/0x1600 [ 87.610426][ T87] kthread+0x3b1/0x4a0 [ 87.614953][ T87] ? __kthread_bind_mask+0xc0/0xc0 [ 87.622187][ T87] ret_from_fork+0x1f/0x30 [ 87.626792][ T87] Kernel panic - not syncing: panic_on_warn set ... [ 87.634334][ T87] CPU: 1 PID: 87 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 87.643267][ T87] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.655659][ T87] Workqueue: netns cleanup_net [ 87.661270][ T87] Call Trace: [ 87.664958][ T87] dump_stack+0x141/0x1d7 [ 87.669927][ T87] panic+0x306/0x73d [ 87.674318][ T87] ? __warn_printk+0xf3/0xf3 [ 87.679913][ T87] ? __warn.cold+0x1a/0x44 [ 87.684998][ T87] ? __nf_unregister_net_hook+0x1eb/0x610 [ 87.691203][ T87] __warn.cold+0x35/0x44 [ 87.695811][ T87] ? __nf_unregister_net_hook+0x1eb/0x610 [ 87.701880][ T87] report_bug+0x1bd/0x210 [ 87.706229][ T87] handle_bug+0x3c/0x60 [ 87.710880][ T87] exc_invalid_op+0x14/0x40 [ 87.715732][ T87] asm_exc_invalid_op+0x12/0x20 [ 87.721525][ T87] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 87.728346][ T87] 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 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 87.751118][ T87] RSP: 0018:ffffc9000113fbc0 EFLAGS: 00010286 [ 87.757536][ T87] RAX: 0000000000000000 RBX: ffff888021c12100 RCX: 0000000000000000 [ 87.766480][ T87] RDX: ffff8880122ad4c0 RSI: ffffffff815c8ba5 RDI: fffff52000227f6a [ 87.774882][ T87] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 87.783553][ T87] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888019b38f20 [ 87.792387][ T87] R13: 0000000000000000 R14: ffff88801ceed800 R15: 0000000000000001 [ 87.801228][ T87] ? wake_up_klogd.part.0+0x8e/0xd0 [ 87.807241][ T87] ? vprintk+0x95/0x260 [ 87.812043][ T87] nf_unregister_net_hooks+0x117/0x160 [ 87.818077][ T87] arpt_unregister_table_pre_exit+0x67/0x80 [ 87.824342][ T87] ? arptable_filter_net_exit+0x20/0x20 [ 87.830110][ T87] cleanup_net+0x451/0xb10 [ 87.834614][ T87] ? ops_free_list.part.0+0x3d0/0x3d0 [ 87.840193][ T87] process_one_work+0x98d/0x1600 [ 87.845241][ T87] ? pwq_dec_nr_in_flight+0x320/0x320 [ 87.851164][ T87] ? rwlock_bug.part.0+0x90/0x90 [ 87.856451][ T87] ? _raw_spin_lock_irq+0x41/0x50 [ 87.861766][ T87] worker_thread+0x64c/0x1120 [ 87.866717][ T87] ? process_one_work+0x1600/0x1600 [ 87.872223][ T87] kthread+0x3b1/0x4a0 [ 87.876722][ T87] ? __kthread_bind_mask+0xc0/0xc0 [ 87.882554][ T87] ret_from_fork+0x1f/0x30 [ 87.889516][ T87] Kernel Offset: disabled [ 87.894475][ T87] Rebooting in 86400 seconds..